# Configure.ac script for Libgcrypt
# Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2006,
#               2007, 2008, 2009, 2011 Free Software Foundation, Inc.
# Copyright (C) 2012, 2013  g10 Code GmbH
#
# This file is part of Libgcrypt.
#
# Libgcrypt is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of
# the License, or (at your option) any later version.
#
# Libgcrypt is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this program; if not, see <http://www.gnu.org/licenses/>.

# (Process this file with autoconf to produce a configure script.)
AC_REVISION($Revision$)
AC_PREREQ(2.60)
min_automake_version="1.14"

# To build a release you need to create a tag with the version number
# (git tag -s libgcrypt-n.m.k) and run "./autogen.sh --force".  Please
# bump the version number immediately after the release and do another
# commit and push so that the git magic is able to work.  See below
# for the LT versions.
m4_define(mym4_version_major, [1])
m4_define(mym4_version_minor, [6])
m4_define(mym4_version_micro, [3])

# Below is m4 magic to extract and compute the revision number, the
# decimalized short revision number, a beta version string, and a flag
# indicating a development version (mym4_isgit). Note that the m4
# processing is done by autoconf and not during the configure run.
m4_define(mym4_version,
          [mym4_version_major.mym4_version_minor.mym4_version_micro])
m4_define([mym4_revision],
          m4_esyscmd([git rev-parse --short HEAD | tr -d '\n\r']))
m4_define([mym4_revision_dec],
          m4_esyscmd_s([echo $((0x$(echo ]mym4_revision[|head -c 4)))]))
m4_define([mym4_betastring],
          m4_esyscmd_s([git describe --match 'libgcrypt-[0-9].*[0-9]' --long|\
                        awk -F- '$3!=0{print"-beta"$3}']))
m4_define([mym4_isgit],m4_if(mym4_betastring,[],[no],[yes]))
m4_define([mym4_full_version],[mym4_version[]mym4_betastring])

AC_INIT([libgcrypt],[mym4_full_version],[http://bugs.gnupg.org])

# LT Version numbers, remember to change them just *before* a release.
#   (Interfaces removed:    CURRENT++, AGE=0, REVISION=0)
#   (Interfaces added:      CURRENT++, AGE++, REVISION=0)
#   (No interfaces changed:                   REVISION++)
LIBGCRYPT_LT_CURRENT=20
LIBGCRYPT_LT_AGE=0
LIBGCRYPT_LT_REVISION=3


# If the API is changed in an incompatible way: increment the next counter.
#
# 1.6: ABI and API change but the change is to most users irrelevant
#      and thus the API version number has not been incremented.
LIBGCRYPT_CONFIG_API_VERSION=1

# If you change the required gpg-error version, please remove
# unnecessary error code defines in src/gcrypt-int.h.
NEED_GPG_ERROR_VERSION=1.11

PACKAGE=$PACKAGE_NAME
VERSION=$PACKAGE_VERSION

AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_SRCDIR([src/libgcrypt.vers])
AM_INIT_AUTOMAKE([serial-tests dist-bzip2])
AC_CONFIG_HEADER(config.h)
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_LIBOBJ_DIR([compat])
AC_CANONICAL_HOST
AM_MAINTAINER_MODE
AM_SILENT_RULES

AH_TOP([
#ifndef _GCRYPT_CONFIG_H_INCLUDED
#define _GCRYPT_CONFIG_H_INCLUDED

/* Enable gpg-error's strerror macro for W32CE.  */
#define GPG_ERR_ENABLE_ERRNO_MACROS 1
])

AH_BOTTOM([
#define _GCRYPT_IN_LIBGCRYPT 1

/* If the configure check for endianness has been disabled, get it from
   OS macros.  This is intended for making fat binary builds on OS X.  */
#ifdef DISABLED_ENDIAN_CHECK
# if defined(__BIG_ENDIAN__)
#  define WORDS_BIGENDIAN 1
# elif defined(__LITTLE_ENDIAN__)
#  undef WORDS_BIGENDIAN
# else
#  error "No endianness found"
# endif
#endif /*DISABLED_ENDIAN_CHECK*/

/* We basically use the original Camellia source.  Make sure the symbols
   properly prefixed.  */
#define CAMELLIA_EXT_SYM_PREFIX _gcry_

#endif /*_GCRYPT_CONFIG_H_INCLUDED*/
])

AH_VERBATIM([_REENTRANT],
[/* To allow the use of Libgcrypt in multithreaded programs we have to use
    special features from the library. */
#ifndef _REENTRANT
# define _REENTRANT 1
#endif
])


AC_SUBST(LIBGCRYPT_LT_CURRENT)
AC_SUBST(LIBGCRYPT_LT_AGE)
AC_SUBST(LIBGCRYPT_LT_REVISION)
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version of this package])
VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x%02x" mym4_version_major \
                          mym4_version_minor mym4_version_micro)
AC_SUBST(VERSION_NUMBER)


######################
##  Basic checks.  ### (we need some results later on (e.g. $GCC)
######################

AC_PROG_MAKE_SET
missing_dir=`cd $ac_aux_dir && pwd`
AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
# AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
AC_PROG_CC
AC_PROG_CPP
AM_PROG_CC_C_O
AM_PROG_AS
AC_ISC_POSIX
AC_PROG_INSTALL
AC_PROG_AWK

AC_GNU_SOURCE

# We need to compile and run a program on the build machine.  A
# comment in libgpg-error says that the AC_PROG_CC_FOR_BUILD macro in
# the AC archive is broken for autoconf 2.57.  Given that there is no
# newer version of that macro, we assume that it is also broken for
# autoconf 2.61 and thus we use a simple but usually sufficient
# approach.
AC_MSG_CHECKING(for cc for build)
if test "$cross_compiling" = "yes"; then
  CC_FOR_BUILD="${CC_FOR_BUILD-cc}"
else
  CC_FOR_BUILD="${CC_FOR_BUILD-$CC}"
fi
AC_MSG_RESULT($CC_FOR_BUILD)
AC_ARG_VAR(CC_FOR_BUILD,[build system C compiler])


LT_PREREQ([2.2.6])
LT_INIT([win32-dll disable-static])
LT_LANG([Windows Resource])


##########################
## General definitions. ##
##########################

# Used by libgcrypt-config
LIBGCRYPT_CONFIG_LIBS="-lgcrypt"
LIBGCRYPT_CONFIG_CFLAGS=""
LIBGCRYPT_CONFIG_HOST="$host"

# Definitions for symmetric ciphers.
available_ciphers="arcfour blowfish cast5 des aes twofish serpent rfc2268 seed"
available_ciphers="$available_ciphers camellia idea salsa20 gost28147"
enabled_ciphers=""

# Definitions for public-key ciphers.
available_pubkey_ciphers="dsa elgamal rsa ecc"
enabled_pubkey_ciphers=""

# Definitions for message digests.
available_digests="crc gostr3411-94 md4 md5 rmd160 sha1 sha256"
available_digests_64="sha512 tiger whirlpool stribog"
enabled_digests=""

# Definitions for kdfs (optional ones)
available_kdfs="s2k pkdf2"
available_kdfs_64="scrypt"
enabled_kdfs=""

# Definitions for random modules.
available_random_modules="linux egd unix"
auto_random_modules="$available_random_modules"

# Supported thread backends.
LIBGCRYPT_THREAD_MODULES=""

# Other definitions.
print_egd_notice=no
have_w32_system=no
have_w32ce_system=no
have_pthread=no


# Setup some stuff depending on host.
case "${host}" in
    *-*-mingw32*)
      ac_cv_have_dev_random=no
      have_w32_system=yes
      case "${host}" in
        *-mingw32ce*)
            have_w32ce_system=yes
            available_random_modules="w32ce"
            ;;
        *)
            available_random_modules="w32"
            ;;
      esac
      AC_DEFINE(USE_ONLY_8DOT3,1,
                [set this to limit filenames to the 8.3 format])
      AC_DEFINE(HAVE_DRIVE_LETTERS,1,
                [defined if we must run on a stupid file system])
      AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
                [defined if we run on some of the PCDOS like systems
                 (DOS, Windoze. OS/2) with special properties like
                  no file modes])
      ;;

    i?86-emx-os2 | i?86-*-os2*emx)
        # OS/2 with the EMX environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        AC_DEFINE(HAVE_DOSISH_SYSTEM)
        ;;

    i?86-*-msdosdjgpp*)
        # DOS with the DJGPP environment
        ac_cv_have_dev_random=no
        AC_DEFINE(HAVE_DRIVE_LETTERS)
        AC_DEFINE(HAVE_DOSISH_SYSTEM)
        ;;

    *-*-hpux*)
        if test -z "$GCC" ; then
            CFLAGS="$CFLAGS -Ae -D_HPUX_SOURCE"
        fi
        ;;
    *-dec-osf4*)
        if test -z "$GCC" ; then
            # Suppress all warnings
            # to get rid of the unsigned/signed char mismatch warnings.
            CFLAGS="$CFLAGS -w"
        fi
        ;;
    m68k-atari-mint)
        ;;
    *)
      ;;
esac

if test "$have_w32_system" = yes; then
   AC_DEFINE(HAVE_W32_SYSTEM,1, [Defined if we run on a W32 API based system])
   if test "$have_w32ce_system" = yes; then
     AC_DEFINE(HAVE_W32CE_SYSTEM,1,[Defined if we run on WindowsCE])
   fi
fi
AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)
AM_CONDITIONAL(HAVE_W32CE_SYSTEM, test "$have_w32ce_system" = yes)



# A printable OS Name is sometimes useful.
case "${host}" in
    *-*-mingw32ce*)
        PRINTABLE_OS_NAME="W32CE"
        ;;

    *-*-mingw32*)
        PRINTABLE_OS_NAME="W32"
        ;;

    i?86-emx-os2 | i?86-*-os2*emx )
        PRINTABLE_OS_NAME="OS/2"
        ;;

    i?86-*-msdosdjgpp*)
        PRINTABLE_OS_NAME="MSDOS/DJGPP"
        ;;

    *-linux*)
        PRINTABLE_OS_NAME="GNU/Linux"
        ;;

    *)
        PRINTABLE_OS_NAME=`uname -s || echo "Unknown"`
        ;;
esac

#
# Figure out the name of the random device
#
case "${host}" in
    *-openbsd*)
        NAME_OF_DEV_RANDOM="/dev/srandom"
        NAME_OF_DEV_URANDOM="/dev/urandom"
        ;;

    *)
        NAME_OF_DEV_RANDOM="/dev/random"
        NAME_OF_DEV_URANDOM="/dev/urandom"
        ;;
esac


AC_ARG_ENABLE(endian-check,
              AC_HELP_STRING([--disable-endian-check],
	      [disable the endian check and trust the OS provided macros]),
	      endiancheck=$enableval,endiancheck=yes)
if test x"$endiancheck" = xyes ; then
  AC_C_BIGENDIAN
else
  AC_DEFINE(DISABLED_ENDIAN_CHECK,1,[configure did not test for endianess])
fi

AC_CHECK_SIZEOF(unsigned short, 2)
AC_CHECK_SIZEOF(unsigned int, 4)
AC_CHECK_SIZEOF(unsigned long, 4)
AC_CHECK_SIZEOF(unsigned long long, 0)

AC_TYPE_UINTPTR_T

if test "$ac_cv_sizeof_unsigned_short" = "0" \
   || test "$ac_cv_sizeof_unsigned_int" = "0" \
   || test "$ac_cv_sizeof_unsigned_long" = "0"; then
    AC_MSG_WARN([Hmmm, something is wrong with the sizes - using defaults]);
fi

# Do we have any 64-bit data types?
if test "$ac_cv_sizeof_unsigned_int" != "8" \
   && test "$ac_cv_sizeof_unsigned_long" != "8" \
   && test "$ac_cv_sizeof_unsigned_long_long" != "8" \
   && test "$ac_cv_sizeof_uint64_t" != "8"; then
    AC_MSG_WARN([No 64-bit types.  Disabling TIGER/192, SCRYPT, SHA-384, \
 SHA-512 and GOST R 34.11-12])
else
  available_digests="$available_digests $available_digests_64"
  available_kdfs="$available_kdfs $available_kdfs_64"
fi

# If not specified otherwise, all available algorithms will be
# included.
default_ciphers="$available_ciphers"
default_pubkey_ciphers="$available_pubkey_ciphers"
default_digests="$available_digests"
default_kdfs="$available_kdfs"

# Substitutions to set generated files in a Emacs buffer to read-only.
AC_SUBST(emacs_local_vars_begin, ['Local Variables:'])
AC_SUBST(emacs_local_vars_read_only, ['buffer-read-only: t'])
AC_SUBST(emacs_local_vars_end, ['End:'])

############################
## Command line switches. ##
############################

# Implementation of the --enable-ciphers switch.
AC_ARG_ENABLE(ciphers,
	      AC_HELP_STRING([--enable-ciphers=ciphers],
			     [select the symmetric ciphers to include]),
	      [enabled_ciphers=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_ciphers=""])
if test "x$enabled_ciphers" = "x" \
   -o "$enabled_ciphers" = "yes"  \
   -o "$enabled_ciphers" = "no"; then
   enabled_ciphers=$default_ciphers
fi
AC_MSG_CHECKING([which symmetric ciphers to include])
for cipher in $enabled_ciphers; do
    LIST_MEMBER($cipher, $available_ciphers)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported cipher "$cipher" specified])
    fi
done
AC_MSG_RESULT([$enabled_ciphers])

# Implementation of the --enable-pubkey-ciphers switch.
AC_ARG_ENABLE(pubkey-ciphers,
	      AC_HELP_STRING([--enable-pubkey-ciphers=ciphers],
			     [select the public-key ciphers to include]),
	      [enabled_pubkey_ciphers=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_pubkey_ciphers=""])
if test "x$enabled_pubkey_ciphers" = "x" \
   -o "$enabled_pubkey_ciphers" = "yes"  \
   -o "$enabled_pubkey_ciphers" = "no"; then
   enabled_pubkey_ciphers=$default_pubkey_ciphers
fi
AC_MSG_CHECKING([which public-key ciphers to include])
for cipher in $enabled_pubkey_ciphers; do
    LIST_MEMBER($cipher, $available_pubkey_ciphers)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported public-key cipher specified])
    fi
done
AC_MSG_RESULT([$enabled_pubkey_ciphers])

# Implementation of the --enable-digests switch.
AC_ARG_ENABLE(digests,
	      AC_HELP_STRING([--enable-digests=digests],
			     [select the message digests to include]),
	      [enabled_digests=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
	      [enabled_digests=""])
if test "x$enabled_digests" = "x" \
   -o "$enabled_digests" = "yes"  \
   -o "$enabled_digests" = "no"; then
   enabled_digests=$default_digests
fi
AC_MSG_CHECKING([which message digests to include])
for digest in $enabled_digests; do
    LIST_MEMBER($digest, $available_digests)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported message digest specified])
    fi
done
AC_MSG_RESULT([$enabled_digests])

# Implementation of the --enable-kdfs switch.
AC_ARG_ENABLE(kdfs,
      AC_HELP_STRING([--enable-kdfs=kdfs],
		     [select the KDFs to include]),
      [enabled_kdfs=`echo $enableval | tr ',:' '  ' | tr '[A-Z]' '[a-z]'`],
      [enabled_kdfs=""])
if test "x$enabled_kdfs" = "x" \
   -o "$enabled_kdfs" = "yes"  \
   -o "$enabled_kdfs" = "no"; then
   enabled_kdfs=$default_kdfs
fi
AC_MSG_CHECKING([which key derivation functions to include])
for kdf in $enabled_kdfs; do
    LIST_MEMBER($kdf, $available_kdfs)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported key derivation function specified])
    fi
done
AC_MSG_RESULT([$enabled_kdfs])

# Implementation of the --enable-random switch.
AC_ARG_ENABLE(random,
	      AC_HELP_STRING([--enable-random=name],
	                     [select which random number generator to use]),
	      [random=`echo $enableval | tr '[A-Z]' '[a-z]'`],
	      [])
if test "x$random" = "x" -o "$random" = "yes" -o "$random" = "no"; then
    random=default
fi
AC_MSG_CHECKING([which random module to use])
if test "$random" != "default" -a "$random" != "auto"; then
    LIST_MEMBER($random, $available_random_modules)
    if test "$found" = "0"; then
       AC_MSG_ERROR([unsupported random module specified])
    fi
fi
AC_MSG_RESULT($random)

# Implementation of the --disable-dev-random switch.
AC_MSG_CHECKING([whether use of /dev/random is requested])
AC_ARG_ENABLE(dev-random,
[  --disable-dev-random    disable the use of dev random],
    try_dev_random=$enableval, try_dev_random=yes)
AC_MSG_RESULT($try_dev_random)

# Implementation of the --with-egd-socket switch.
AC_ARG_WITH(egd-socket,
    [  --with-egd-socket=NAME  Use NAME for the EGD socket)],
            egd_socket_name="$withval", egd_socket_name="" )
AC_DEFINE_UNQUOTED(EGD_SOCKET_NAME, "$egd_socket_name",
                   [Define if you don't want the default EGD socket name.
                    For details see cipher/rndegd.c])

# Implementation of the --enable-random-daemon
AC_MSG_CHECKING([whether the experimental random daemon is requested])
AC_ARG_ENABLE([random-daemon],
              AC_HELP_STRING([--enable-random-daemon],
                             [Build and support the experimental gcryptrnd]),
              [use_random_daemon=$enableval],
              [use_random_daemon=no])
AC_MSG_RESULT($use_random_daemon)
if test x$use_random_daemon = xyes ; then
    AC_DEFINE(USE_RANDOM_DAEMON,1,
              [Define to support the experimental random daemon])
fi
AM_CONDITIONAL(USE_RANDOM_DAEMON, test x$use_random_daemon = xyes)


# Implementation of --disable-asm.
AC_MSG_CHECKING([whether MPI assembler modules are requested])
AC_ARG_ENABLE([asm],
              AC_HELP_STRING([--disable-asm],
	                     [Disable MPI assembler modules]),
              [try_asm_modules=$enableval],
              [try_asm_modules=yes])
AC_MSG_RESULT($try_asm_modules)

# Implementation of the --enable-m-guard switch.
AC_MSG_CHECKING([whether memory guard is requested])
AC_ARG_ENABLE(m-guard,
              AC_HELP_STRING([--enable-m-guard],
                             [Enable memory guard facility]),
              [use_m_guard=$enableval], [use_m_guard=no])
AC_MSG_RESULT($use_m_guard)
if test "$use_m_guard" = yes ; then
    AC_DEFINE(M_GUARD,1,[Define to use the (obsolete) malloc guarding feature])
fi

# Implementation of the --enable-large-data-tests switch.
AC_MSG_CHECKING([whether to run large data tests])
AC_ARG_ENABLE(large-data-tests,
              AC_HELP_STRING([--enable-large-data-tests],
                 [Enable the real long ruinning large data tests]),
	      large_data_tests=$enableval,large_data_tests=no)
AC_MSG_RESULT($large_data_tests)
AC_SUBST(RUN_LARGE_DATA_TESTS, $large_data_tests)


# Implementation of the --with-capabilities switch.
# Check whether we want to use Linux capabilities
AC_MSG_CHECKING([whether use of capabilities is requested])
AC_ARG_WITH(capabilities,
            AC_HELP_STRING([--with-capabilities],
                           [Use linux capabilities [default=no]]),
            [use_capabilities="$withval"],[use_capabilities=no])
AC_MSG_RESULT($use_capabilities)

# Implementation of the --enable-hmac-binary-check.
AC_MSG_CHECKING([whether a HMAC binary check is requested])
AC_ARG_ENABLE(hmac-binary-check,
              AC_HELP_STRING([--enable-hmac-binary-check],
                             [Enable library integrity check]),
              [use_hmac_binary_check=$enableval],
              [use_hmac_binary_check=no])
AC_MSG_RESULT($use_hmac_binary_check)
if test "$use_hmac_binary_check" = yes ; then
    AC_DEFINE(ENABLE_HMAC_BINARY_CHECK,1,
              [Define to support an HMAC based integrity check])
fi


# Implementation of the --disable-padlock-support switch.
AC_MSG_CHECKING([whether padlock support is requested])
AC_ARG_ENABLE(padlock-support,
              AC_HELP_STRING([--disable-padlock-support],
       	         [Disable support for the PadLock Engine of VIA processors]),
	      padlocksupport=$enableval,padlocksupport=yes)
AC_MSG_RESULT($padlocksupport)

# Implementation of the --disable-aesni-support switch.
AC_MSG_CHECKING([whether AESNI support is requested])
AC_ARG_ENABLE(aesni-support,
              AC_HELP_STRING([--disable-aesni-support],
                 [Disable support for the Intel AES-NI instructions]),
	      aesnisupport=$enableval,aesnisupport=yes)
AC_MSG_RESULT($aesnisupport)

# Implementation of the --disable-pclmul-support switch.
AC_MSG_CHECKING([whether PCLMUL support is requested])
AC_ARG_ENABLE(pclmul-support,
              AC_HELP_STRING([--disable-pclmul-support],
                 [Disable support for the Intel PCLMUL instructions]),
	      pclmulsupport=$enableval,pclmulsupport=yes)
AC_MSG_RESULT($pclmulsupport)

# Implementation of the --disable-drng-support switch.
AC_MSG_CHECKING([whether DRNG support is requested])
AC_ARG_ENABLE(drng-support,
              AC_HELP_STRING([--disable-drng-support],
                 [Disable support for the Intel DRNG (RDRAND instruction)]),
	      drngsupport=$enableval,drngsupport=yes)
AC_MSG_RESULT($drngsupport)

# Implementation of the --disable-avx-support switch.
AC_MSG_CHECKING([whether AVX support is requested])
AC_ARG_ENABLE(avx-support,
              AC_HELP_STRING([--disable-avx-support],
                 [Disable support for the Intel AVX instructions]),
	      avxsupport=$enableval,avxsupport=yes)
AC_MSG_RESULT($avxsupport)

# Implementation of the --disable-avx2-support switch.
AC_MSG_CHECKING([whether AVX2 support is requested])
AC_ARG_ENABLE(avx2-support,
              AC_HELP_STRING([--disable-avx2-support],
                 [Disable support for the Intel AVX2 instructions]),
	      avx2support=$enableval,avx2support=yes)
AC_MSG_RESULT($avx2support)

# Implementation of the --disable-neon-support switch.
AC_MSG_CHECKING([whether NEON support is requested])
AC_ARG_ENABLE(neon-support,
              AC_HELP_STRING([--disable-neon-support],
                 [Disable support for the ARM NEON instructions]),
	      neonsupport=$enableval,neonsupport=yes)
AC_MSG_RESULT($neonsupport)

# Implementation of the --disable-O-flag-munging switch.
AC_MSG_CHECKING([whether a -O flag munging is requested])
AC_ARG_ENABLE([O-flag-munging],
              AC_HELP_STRING([--disable-O-flag-munging],
                 [Disable modification of the cc -O flag]),
              [enable_o_flag_munging=$enableval],
              [enable_o_flag_munging=yes])
AC_MSG_RESULT($enable_o_flag_munging)
AM_CONDITIONAL(ENABLE_O_FLAG_MUNGING, test "$enable_o_flag_munging" = "yes")

# Implementation of the --disable-amd64-as-feature-detection switch.
AC_MSG_CHECKING([whether to enable AMD64 as(1) feature detection])
AC_ARG_ENABLE(amd64-as-feature-detection,
              AC_HELP_STRING([--disable-amd64-as-feature-detection],
                 [Disable the auto-detection of AMD64 as(1) features]),
	      amd64_as_feature_detection=$enableval,
              amd64_as_feature_detection=yes)
AC_MSG_RESULT($amd64_as_feature_detection)


AC_DEFINE_UNQUOTED(PRINTABLE_OS_NAME, "$PRINTABLE_OS_NAME",
                   [A human readable text with the name of the OS])

# For some systems we know that we have ld_version scripts.
# Use it then as default.
have_ld_version_script=no
case "${host}" in
    *-*-linux*)
	have_ld_version_script=yes
        ;;
    *-*-gnu*)
	have_ld_version_script=yes
        ;;
esac
AC_ARG_ENABLE([ld-version-script],
              AC_HELP_STRING([--enable-ld-version-script],
                             [enable/disable use of linker version script.
                              (default is system dependent)]),
              [have_ld_version_script=$enableval],
              [ : ] )
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

AC_DEFINE_UNQUOTED(NAME_OF_DEV_RANDOM, "$NAME_OF_DEV_RANDOM",
                   [defined to the name of the strong random device])
AC_DEFINE_UNQUOTED(NAME_OF_DEV_URANDOM, "$NAME_OF_DEV_URANDOM",
                   [defined to the name of the weaker random device])


###############################
#### Checks for libraries. ####
###############################

#
# gpg-error is required.
#
AM_PATH_GPG_ERROR("$NEED_GPG_ERROR_VERSION")
if test "x$GPG_ERROR_LIBS" = "x"; then
  AC_MSG_ERROR([libgpg-error is needed.
                See ftp://ftp.gnupg.org/gcrypt/libgpg-error/ .])
fi

AC_DEFINE(GPG_ERR_SOURCE_DEFAULT, GPG_ERR_SOURCE_GCRYPT,
          [The default error source for libgcrypt.])

#
# Check whether the GNU Pth library is available.  We require this
# to build the optional gcryptrnd program.
#
AC_ARG_WITH(pth-prefix,
            AC_HELP_STRING([--with-pth-prefix=PFX],
                           [prefix where GNU Pth is installed (optional)]),
     pth_config_prefix="$withval", pth_config_prefix="")
if test x$pth_config_prefix != x ; then
   PTH_CONFIG="$pth_config_prefix/bin/pth-config"
fi
if test "$use_random_daemon" = "yes"; then
  AC_PATH_PROG(PTH_CONFIG, pth-config, no)
  if test "$PTH_CONFIG" = "no"; then
    AC_MSG_WARN([[
***
*** To build the Libgcrypt's random number daemon
*** we need the support of the GNU Portable Threads Library.
*** Download it from ftp://ftp.gnu.org/gnu/pth/
*** On a Debian GNU/Linux system you might want to try
***   apt-get install libpth-dev
***]])
  else
    GNUPG_PTH_VERSION_CHECK([1.3.7])
    if test $have_pth = yes; then
       PTH_CFLAGS=`$PTH_CONFIG --cflags`
       PTH_LIBS=`$PTH_CONFIG --ldflags`
       PTH_LIBS="$PTH_LIBS `$PTH_CONFIG --libs --all`"
       AC_DEFINE(USE_GNU_PTH, 1,
                [Defined if the GNU Portable Thread Library should be used])
       AC_DEFINE(HAVE_PTH, 1,
                [Defined if the GNU Pth is available])
    fi
  fi
fi
AC_SUBST(PTH_CFLAGS)
AC_SUBST(PTH_LIBS)


#
# See which thread system we have
#
# Windows has always thread support; thus we don't bother to test for
# it as it may lead to false results when cross building.
if test "$have_w32_system" = yes; then
  AC_DEFINE([USE_WINDOWS_THREADS], [1])
  LIBTHREAD=
  LTLIBTHREAD=
  LIBMULTITHREAD=
  LTLIBMULTITHREAD=
  THREADLIB_CPPFLAGS=""
  AC_SUBST([LIBTHREAD])
  AC_SUBST([LTLIBTHREAD])
  AC_SUBST([LIBMULTITHREAD])
  AC_SUBST([LTLIBMULTITHREAD])
else
  gl_LOCK
fi


# Solaris needs -lsocket and -lnsl. Unisys system includes
# gethostbyname in libsocket but needs libnsl for socket.
AC_SEARCH_LIBS(setsockopt, [socket], ,
	[AC_SEARCH_LIBS(setsockopt, [socket], , , [-lnsl])])
AC_SEARCH_LIBS(setsockopt, [nsl])

##################################
#### Checks for header files. ####
##################################

AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h sys/select.h sys/msg.h)
INSERT_SYS_SELECT_H=
if test x"$ac_cv_header_sys_select_h" = xyes; then
  INSERT_SYS_SELECT_H=" include <sys/select.h>"
fi
AC_SUBST(INSERT_SYS_SELECT_H)


##########################################
#### Checks for typedefs, structures, ####
####  and compiler characteristics.   ####
##########################################

AC_C_CONST
AC_C_INLINE
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_DECL_SYS_SIGLIST
AC_TYPE_PID_T

GNUPG_CHECK_TYPEDEF(byte, HAVE_BYTE_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ushort, HAVE_USHORT_TYPEDEF)
GNUPG_CHECK_TYPEDEF(ulong, HAVE_ULONG_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u16, HAVE_U16_TYPEDEF)
GNUPG_CHECK_TYPEDEF(u32, HAVE_U32_TYPEDEF)

gl_TYPE_SOCKLEN_T
case "${host}" in
  *-*-mingw32*)
    # socklen_t may or may not be defined depending on what headers
    # are included.  To be safe we use int as this is the actual type.
    FALLBACK_SOCKLEN_T="typedef int gcry_socklen_t;"
    ;;
  *)
    if test ".$gl_cv_socklen_t_equiv" = "."; then
      FALLBACK_SOCKLEN_T="typedef socklen_t gcry_socklen_t;"
    else
      FALLBACK_SOCKLEN_T="typedef ${gl_cv_socklen_t_equiv} gcry_socklen_t;"
    fi
esac
AC_SUBST(FALLBACK_SOCKLEN_T)


#
# Check for __builtin_bswap32 intrinsic.
#
AC_CACHE_CHECK(for __builtin_bswap32,
       [gcry_cv_have_builtin_bswap32],
       [gcry_cv_have_builtin_bswap32=no
        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
          [int x = 0; int y = __builtin_bswap32(x); return y;])],
          [gcry_cv_have_builtin_bswap32=yes])])
if test "$gcry_cv_have_builtin_bswap32" = "yes" ; then
   AC_DEFINE(HAVE_BUILTIN_BSWAP32,1,
             [Defined if compiler has '__builtin_bswap32' intrinsic])
fi


#
# Check for __builtin_bswap64 intrinsic.
#
AC_CACHE_CHECK(for __builtin_bswap64,
       [gcry_cv_have_builtin_bswap64],
       [gcry_cv_have_builtin_bswap64=no
        AC_LINK_IFELSE([AC_LANG_PROGRAM([],
          [long long x = 0; long long y = __builtin_bswap64(x); return y;])],
          [gcry_cv_have_builtin_bswap64=yes])])
if test "$gcry_cv_have_builtin_bswap64" = "yes" ; then
   AC_DEFINE(HAVE_BUILTIN_BSWAP64,1,
             [Defined if compiler has '__builtin_bswap64' intrinsic])
fi


#
# Check for VLA support (variable length arrays).
#
AC_CACHE_CHECK(whether the variable length arrays are supported,
       [gcry_cv_have_vla],
       [gcry_cv_have_vla=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void f1(char *, int);
            char foo(int i) {
              char b[(i < 0 ? 0 : i) + 1];
              f1(b, sizeof b); return b[0];}]])],
          [gcry_cv_have_vla=yes])])
if test "$gcry_cv_have_vla" = "yes" ; then
   AC_DEFINE(HAVE_VLA,1, [Defined if variable length arrays are supported])
fi


#
# Check for ELF visibility support.
#
AC_CACHE_CHECK(whether the visibility attribute is supported,
       gcry_cv_visibility_attribute,
       [gcry_cv_visibility_attribute=no
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[int foo __attribute__ ((visibility ("hidden"))) = 1;
            int bar __attribute__ ((visibility ("protected"))) = 1;
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
            if grep '\.hidden.*foo' conftest.s >/dev/null 2>&1 ; then
                if grep '\.protected.*bar' conftest.s >/dev/null 2>&1; then
                    gcry_cv_visibility_attribute=yes
                fi
            fi
        fi
       ])
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(for broken visibility attribute,
       gcry_cv_broken_visibility_attribute,
       [gcry_cv_broken_visibility_attribute=yes
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[int foo (int x);
            int bar (int x) __asm__ ("foo")
                            __attribute__ ((visibility ("hidden")));
            int bar (int x) { return x; }
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
           if grep '\.hidden@<:@ 	_@:>@foo' conftest.s >/dev/null 2>&1;
            then
               gcry_cv_broken_visibility_attribute=no
           fi
        fi
       ])
fi
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(for broken alias attribute,
       gcry_cv_broken_alias_attribute,
       [gcry_cv_broken_alias_attribute=yes
        AC_LANG_CONFTEST([AC_LANG_SOURCE(
          [[extern int foo (int x) __asm ("xyzzy");
            int bar (int x) { return x; }
            extern __typeof (bar) foo __attribute ((weak, alias ("bar")));
            extern int dfoo;
            extern __typeof (dfoo) dfoo __asm ("abccb");
            int dfoo = 1;
          ]])])

        if ${CC-cc} -Werror -S conftest.c -o conftest.s \
                  1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then
           if grep 'xyzzy' conftest.s >/dev/null 2>&1 && \
              grep 'abccb' conftest.s >/dev/null 2>&1; then
              gcry_cv_broken_alias_attribute=no
           fi
        fi
        ])
fi
if test "$gcry_cv_visibility_attribute" = "yes"; then
    AC_CACHE_CHECK(if gcc supports -fvisibility=hidden,
       gcry_cv_gcc_has_f_visibility,
       [gcry_cv_gcc_has_f_visibility=no
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-fvisibility=hidden"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],
                          gcry_cv_gcc_has_f_visibility=yes)
        CFLAGS=$_gcc_cflags_save;
       ])
fi
if test "$gcry_cv_visibility_attribute" = "yes" \
   && test "$gcry_cv_broken_visibility_attribute" != "yes" \
   && test "$gcry_cv_broken_alias_attribute" != "yes" \
   && test "$gcry_cv_gcc_has_f_visibility" = "yes"
 then
   AC_DEFINE(GCRY_USE_VISIBILITY, 1,
               [Define to use the GNU C visibility attribute.])
   CFLAGS="$CFLAGS -fvisibility=hidden"
fi


#
# Check whether the compiler supports the GCC style aligned attribute
#
AC_CACHE_CHECK([whether the GCC style aligned attribute is supported],
       [gcry_cv_gcc_attribute_aligned],
       [gcry_cv_gcc_attribute_aligned=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[struct { int a; } foo __attribute__ ((aligned (16)));]])],
          [gcry_cv_gcc_attribute_aligned=yes])])
if test "$gcry_cv_gcc_attribute_aligned" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ATTRIBUTE_ALIGNED,1,
     [Defined if a GCC style "__attribute__ ((aligned (n))" is supported])
fi


#
# Check whether the compiler supports 'asm' or '__asm__' keyword for
# assembler blocks.
#
AC_CACHE_CHECK([whether 'asm' assembler keyword is supported],
       [gcry_cv_have_asm],
       [gcry_cv_have_asm=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { asm("":::"memory"); }]])],
          [gcry_cv_have_asm=yes])])
AC_CACHE_CHECK([whether '__asm__' assembler keyword is supported],
       [gcry_cv_have___asm__],
       [gcry_cv_have___asm__=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { __asm__("":::"memory"); }]])],
          [gcry_cv_have___asm__=yes])])
if test "$gcry_cv_have_asm" = "no" ; then
   if test "$gcry_cv_have___asm__" = "yes" ; then
      AC_DEFINE(asm,__asm__,
        [Define to supported assembler block keyword, if plain 'asm' was not
         supported])
   fi
fi


#
# Check whether the compiler supports inline assembly memory barrier.
#
if test "$gcry_cv_have_asm" = "no" ; then
   if test "$gcry_cv_have___asm__" = "yes" ; then
      AC_CACHE_CHECK([whether inline assembly memory barrier is supported],
          [gcry_cv_have_asm_volatile_memory],
          [gcry_cv_have_asm_volatile_memory=no
           AC_COMPILE_IFELSE([AC_LANG_SOURCE(
             [[void a(void) { __asm__ volatile("":::"memory"); }]])],
             [gcry_cv_have_asm_volatile_memory=yes])])
   fi
else
   AC_CACHE_CHECK([whether inline assembly memory barrier is supported],
       [gcry_cv_have_asm_volatile_memory],
       [gcry_cv_have_asm_volatile_memory=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) { asm volatile("":::"memory"); }]])],
          [gcry_cv_have_asm_volatile_memory=yes])])
fi
if test "$gcry_cv_have_asm_volatile_memory" = "yes" ; then
   AC_DEFINE(HAVE_GCC_ASM_VOLATILE_MEMORY,1,
     [Define if inline asm memory barrier is supported])
fi


#
# Check whether GCC assembler supports features needed for our ARM
# implementations.  This needs to be done before setting up the
# assembler stuff.
#
AC_CACHE_CHECK([whether GCC assembler is compatible for ARM assembly implementations],
       [gcry_cv_gcc_arm_platform_as_ok],
       [gcry_cv_gcc_arm_platform_as_ok=no
        AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                /* Test if assembler supports UAL syntax.  */
                ".syntax unified\n\t"
                ".arm\n\t" /* our assembly code is in ARM mode  */
                /* Following causes error if assembler ignored '.syntax unified'.  */
                "asmfunc:\n\t"
                "add %r0, %r0, %r4, ror #12;\n\t"

                /* Test if '.type' and '.size' are supported.  */
                ".size asmfunc,.-asmfunc;\n\t"
                ".type asmfunc,%function;\n\t"
            );]])],
          [gcry_cv_gcc_arm_platform_as_ok=yes])])
if test "$gcry_cv_gcc_arm_platform_as_ok" = "yes" ; then
   AC_DEFINE(HAVE_COMPATIBLE_GCC_ARM_PLATFORM_AS,1,
     [Defined if underlying assembler is compatible with ARM assembly implementations])
fi


#
# Check whether underscores in symbols are required.  This needs to be
# done before setting up the assembler stuff.
#
GNUPG_SYS_SYMBOL_UNDERSCORE()


#################################
####                         ####
#### Setup assembler stuff.  ####
#### Define mpi_cpu_arch.    ####
####                         ####
#################################
AC_ARG_ENABLE(mpi-path,
              AC_HELP_STRING([--enable-mpi-path=EXTRA_PATH],
	      [prepend EXTRA_PATH to list of CPU specific optimizations]),
	      mpi_extra_path="$enableval",mpi_extra_path="")
AC_MSG_CHECKING(architecture and mpi assembler functions)
if test -f $srcdir/mpi/config.links ; then
    . $srcdir/mpi/config.links
    AC_CONFIG_LINKS("$mpi_ln_list")
    ac_cv_mpi_sflags="$mpi_sflags"
    AC_MSG_RESULT($mpi_cpu_arch)
else
    AC_MSG_RESULT(failed)
    AC_MSG_ERROR([mpi/config.links missing!])
fi
MPI_SFLAGS="$ac_cv_mpi_sflags"
AC_SUBST(MPI_SFLAGS)

AM_CONDITIONAL(MPI_MOD_ASM_MPIH_ADD1, test "$mpi_mod_asm_mpih_add1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_SUB1, test "$mpi_mod_asm_mpih_sub1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL1, test "$mpi_mod_asm_mpih_mul1" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL2, test "$mpi_mod_asm_mpih_mul2" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_MUL3, test "$mpi_mod_asm_mpih_mul3" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_LSHIFT, test "$mpi_mod_asm_mpih_lshift" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_MPIH_RSHIFT, test "$mpi_mod_asm_mpih_rshift" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_UDIV, test "$mpi_mod_asm_udiv" = yes)
AM_CONDITIONAL(MPI_MOD_ASM_UDIV_QRNND, test "$mpi_mod_asm_udiv_qrnnd" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_ADD1, test "$mpi_mod_c_mpih_add1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_SUB1, test "$mpi_mod_c_mpih_sub1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL1, test "$mpi_mod_c_mpih_mul1" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL2, test "$mpi_mod_c_mpih_mul2" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_MUL3, test "$mpi_mod_c_mpih_mul3" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_LSHIFT, test "$mpi_mod_c_mpih_lshift" = yes)
AM_CONDITIONAL(MPI_MOD_C_MPIH_RSHIFT, test "$mpi_mod_c_mpih_rshift" = yes)
AM_CONDITIONAL(MPI_MOD_C_UDIV, test "$mpi_mod_c_udiv" = yes)
AM_CONDITIONAL(MPI_MOD_C_UDIV_QRNND, test "$mpi_mod_c_udiv_qrnnd" = yes)

# Reset non applicable feature flags.
if test "$mpi_cpu_arch" != "x86" ; then
   aesnisupport="n/a"
   pclmulsupport="n/a"
   avxsupport="n/a"
   avx2support="n/a"
   padlocksupport="n/a"
   drngsupport="n/a"
fi

if test "$mpi_cpu_arch" != "arm" ; then
   neonsupport="n/a"
fi


#############################################
####                                     ####
#### Platform specific compiler checks.  ####
####                                     ####
#############################################

#
# Check whether GCC inline assembler supports SSSE3 instructions
# This is required for the AES-NI instructions.
#
AC_CACHE_CHECK([whether GCC inline assembler supports SSSE3 instructions],
       [gcry_cv_gcc_inline_asm_ssse3],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_ssse3="n/a"
        else
          gcry_cv_gcc_inline_asm_ssse3=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[static unsigned char be_mask[16] __attribute__ ((aligned (16))) =
              { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 };
            void a(void) {
              __asm__("pshufb %[mask], %%xmm2\n\t"::[mask]"m"(*be_mask):);
            }]])],
          [gcry_cv_gcc_inline_asm_ssse3=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_ssse3" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_SSSE3,1,
     [Defined if inline assembler supports SSSE3 instructions])
fi


#
# Check whether GCC inline assembler supports PCLMUL instructions.
#
AC_CACHE_CHECK([whether GCC inline assembler supports PCLMUL instructions],
       [gcry_cv_gcc_inline_asm_pclmul],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_pclmul="n/a"
        else
          gcry_cv_gcc_inline_asm_pclmul=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("pclmulqdq \$0, %%xmm1, %%xmm3\n\t":::"cc");
            }]])],
          [gcry_cv_gcc_inline_asm_pclmul=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_pclmul" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_PCLMUL,1,
     [Defined if inline assembler supports PCLMUL instructions])
fi


#
# Check whether GCC inline assembler supports AVX instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AVX instructions],
       [gcry_cv_gcc_inline_asm_avx],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_avx="n/a"
        else
          gcry_cv_gcc_inline_asm_avx=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("xgetbv; vaesdeclast (%[mem]),%%xmm0,%%xmm7\n\t"::[mem]"r"(0):);
            }]])],
          [gcry_cv_gcc_inline_asm_avx=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_avx" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AVX,1,
     [Defined if inline assembler supports AVX instructions])
fi


#
# Check whether GCC inline assembler supports AVX2 instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports AVX2 instructions],
       [gcry_cv_gcc_inline_asm_avx2],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_avx2="n/a"
        else
          gcry_cv_gcc_inline_asm_avx2=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("xgetbv; vpbroadcastb %%xmm7,%%ymm1\n\t":::"cc");
            }]])],
          [gcry_cv_gcc_inline_asm_avx2=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_avx2" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_AVX2,1,
     [Defined if inline assembler supports AVX2 instructions])
fi


#
# Check whether GCC inline assembler supports BMI2 instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports BMI2 instructions],
       [gcry_cv_gcc_inline_asm_bmi2],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_inline_asm_bmi2="n/a"
        else
          gcry_cv_gcc_inline_asm_bmi2=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[void a(void) {
              __asm__("rorxl \$23, %%eax, %%edx\\n\\t":::"memory");
            }]])],
          [gcry_cv_gcc_inline_asm_bmi2=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_bmi2" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_BMI2,1,
     [Defined if inline assembler supports BMI2 instructions])
fi


#
# Check whether GCC assembler supports features needed for our amd64
# implementations
#
if test $amd64_as_feature_detection = yes; then
    AC_CACHE_CHECK([whether GCC assembler is compatible for amd64 assembly implementations],
       [gcry_cv_gcc_amd64_platform_as_ok],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_amd64_platform_as_ok="n/a"
        else
          gcry_cv_gcc_amd64_platform_as_ok=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                /* Test if '.type' and '.size' are supported.  */
                /* These work only on ELF targets. */
		/* TODO: add COFF (mingw64, cygwin64) support to assembly
                 * implementations.  Mingw64/cygwin64 also require additional
                 * work because they use different calling convention. */
		"asmfunc:\n\t"
                ".size asmfunc,.-asmfunc;\n\t"
                ".type asmfunc,@function;\n\t"
            );]])],
          [gcry_cv_gcc_amd64_platform_as_ok=yes])
        fi])
  if test "$gcry_cv_gcc_amd64_platform_as_ok" = "yes" ; then
     AC_DEFINE(HAVE_COMPATIBLE_GCC_AMD64_PLATFORM_AS,1,
              [Defined if underlying assembler is compatible with amd64 assembly implementations])
  fi
fi


#
# Check whether GCC assembler supports features needed for assembly
# implementations that use Intel syntax
#
AC_CACHE_CHECK([whether GCC assembler is compatible for Intel syntax assembly implementations],
       [gcry_cv_gcc_platform_as_ok_for_intel_syntax],
       [if test "$mpi_cpu_arch" != "x86" ; then
          gcry_cv_gcc_platform_as_ok_for_intel_syntax="n/a"
        else
          gcry_cv_gcc_platform_as_ok_for_intel_syntax=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".intel_syntax noprefix\n\t"
                "pxor xmm1, xmm7;\n\t"
                /* Intel syntax implementation also use GAS macros, so check
                 * for them here. */
                "VAL_A = xmm4\n\t"
                "VAL_B = xmm2\n\t"
                ".macro SET_VAL_A p1\n\t"
                "  VAL_A = \\\\p1 \n\t"
                ".endm\n\t"
                ".macro SET_VAL_B p1\n\t"
                "  VAL_B = \\\\p1 \n\t"
                ".endm\n\t"
                "vmovdqa VAL_A, VAL_B;\n\t"
                "SET_VAL_A eax\n\t"
                "SET_VAL_B ebp\n\t"
                "add VAL_A, VAL_B;\n\t"
                "add VAL_B, 0b10101;\n\t"
            );]])],
          [gcry_cv_gcc_platform_as_ok_for_intel_syntax=yes])
        fi])
if test "$gcry_cv_gcc_platform_as_ok_for_intel_syntax" = "yes" ; then
  AC_DEFINE(HAVE_INTEL_SYNTAX_PLATFORM_AS,1,
            [Defined if underlying assembler is compatible with Intel syntax assembly implementations])
fi


#
# Check whether compiler is configured for ARMv6 or newer architecture
#
AC_CACHE_CHECK([whether compiler is configured for ARMv6 or newer architecture],
       [gcry_cv_cc_arm_arch_is_v6],
       [if test "$mpi_cpu_arch" != "arm" ; then
          gcry_cv_cc_arm_arch_is_v6="n/a"
        else
          gcry_cv_cc_arm_arch_is_v6=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[
           #if defined(__arm__) && \
             ((defined(__ARM_ARCH) && __ARM_ARCH >= 6) \
             || defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
             || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \
             || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) \
             || defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
             || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
             || defined(__ARM_ARCH_7EM__))
             /* empty */
           #else
             /* fail compile if not ARMv6. */
             not_armv6 not_armv6 = (not_armv6)not_armv6;
           #endif
          ]])],
          [gcry_cv_cc_arm_arch_is_v6=yes])
        fi])
if test "$gcry_cv_cc_arm_arch_is_v6" = "yes" ; then
   AC_DEFINE(HAVE_ARM_ARCH_V6,1,
     [Defined if ARM architecture is v6 or newer])
fi


#
# Check whether GCC inline assembler supports NEON instructions
#
AC_CACHE_CHECK([whether GCC inline assembler supports NEON instructions],
       [gcry_cv_gcc_inline_asm_neon],
       [if test "$mpi_cpu_arch" != "arm" ; then
          gcry_cv_gcc_inline_asm_neon="n/a"
        else
          gcry_cv_gcc_inline_asm_neon=no
          AC_COMPILE_IFELSE([AC_LANG_SOURCE(
          [[__asm__(
                ".syntax unified\n\t"
                ".thumb\n\t"
                ".fpu neon\n\t"
                "vld1.64 {%q0-%q1}, [%r0]!;\n\t"
                "vrev64.8 %q0, %q3;\n\t"
                "vadd.u64 %q0, %q1;\n\t"
                "vadd.s64 %d3, %d2, %d3;\n\t"
                );
            ]])],
          [gcry_cv_gcc_inline_asm_neon=yes])
        fi])
if test "$gcry_cv_gcc_inline_asm_neon" = "yes" ; then
   AC_DEFINE(HAVE_GCC_INLINE_ASM_NEON,1,
     [Defined if inline assembler supports NEON instructions])
fi


#######################################
#### Checks for library functions. ####
#######################################

AC_FUNC_VPRINTF
# We have replacements for these in src/missing-string.c
AC_CHECK_FUNCS(stpcpy strcasecmp)
# We have replacements for these in src/g10lib.h
AC_CHECK_FUNCS(strtoul memmove stricmp atexit raise)
# Other checks
AC_CHECK_FUNCS(strerror rand mmap getpagesize sysconf waitpid wait4)
AC_CHECK_FUNCS(gettimeofday getrusage gethrtime clock_gettime syslog)
AC_CHECK_FUNCS(fcntl ftruncate flockfile)

GNUPG_CHECK_MLOCK

#
# Replacement functions.
#
AC_REPLACE_FUNCS([getpid clock])


#
# Check wether it is necessary to link against libdl.
#
DL_LIBS=""
if test "$use_hmac_binary_check" = yes ; then
  _gcry_save_libs="$LIBS"
  LIBS=""
  AC_SEARCH_LIBS(dlopen, c dl,,,)
  DL_LIBS=$LIBS
  LIBS="$_gcry_save_libs"
  LIBGCRYPT_CONFIG_LIBS="${LIBGCRYPT_CONFIG_LIBS} ${DL_LIBS}"
fi
AC_SUBST(DL_LIBS)

#
# Check whether we need to link with a pthreads library.
#
if test "x$LIBTHREAD" != x; then
  LIBGCRYPT_CONFIG_LIBS="${LIBGCRYPT_CONFIG_LIBS} ${LIBTHREAD}"
fi


#
# Check whether we can use Linux capabilities as requested.
#
if test "$use_capabilities" = "yes" ; then
use_capabilities=no
AC_CHECK_HEADERS(sys/capability.h)
if test "$ac_cv_header_sys_capability_h" = "yes" ; then
  AC_CHECK_LIB(cap, cap_init, ac_need_libcap=1)
  if test "$ac_cv_lib_cap_cap_init" = "yes"; then
     AC_DEFINE(USE_CAPABILITIES,1,
               [define if capabilities should be used])
     LIBS="$LIBS -lcap"
     use_capabilities=yes
  fi
fi
if test "$use_capabilities" = "no" ; then
    AC_MSG_WARN([[
***
*** The use of capabilities on this system is not possible.
*** You need a recent Linux kernel and some patches:
***   fcaps-2.2.9-990610.patch      (kernel patch for 2.2.9)
***   fcap-module-990613.tar.gz     (kernel module)
***   libcap-1.92.tar.gz            (user mode library and utilities)
*** And you have to configure the kernel with CONFIG_VFS_CAP_PLUGIN
*** set (filesystems menu). Be warned: This code is *really* ALPHA.
***]])
fi
fi

# Check whether a random device is available.
if test "$try_dev_random" = yes ; then
    AC_CACHE_CHECK(for random device, ac_cv_have_dev_random,
    [if test -r "$NAME_OF_DEV_RANDOM" && test -r "$NAME_OF_DEV_URANDOM" ; then
      ac_cv_have_dev_random=yes; else ac_cv_have_dev_random=no; fi])
    if test "$ac_cv_have_dev_random" = yes; then
        AC_DEFINE(HAVE_DEV_RANDOM,1,
                 [defined if the system supports a random device] )
    fi
else
    AC_MSG_CHECKING(for random device)
    ac_cv_have_dev_random=no
    AC_MSG_RESULT(has been disabled)
fi

# Figure out the random modules for this configuration.
if test "$random" = "default"; then

    # Select default value.
    if test "$ac_cv_have_dev_random" = yes; then
        # Try Linuxish random device.
        random_modules="linux"
    else
        case "${host}" in
        *-*-mingw32ce*)
          # WindowsCE random device.
          random_modules="w32ce"
          ;;
        *-*-mingw32*|*-*-cygwin*)
          # Windows random device.
          random_modules="w32"
          ;;
        *)
          # Build everything, allow to select at runtime.
          random_modules="$auto_random_modules"
          ;;
        esac
    fi
else
    if test "$random" = "auto"; then
        # Build everything, allow to select at runtime.
        random_modules="$auto_random_modules"
    else
        random_modules="$random"
    fi
fi


#
# Other defines
#
if test mym4_isgit = "yes"; then
    AC_DEFINE(IS_DEVELOPMENT_VERSION,1,
              [Defined if this is not a regular release])
fi


AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)


# This is handy for debugging so the compiler doesn't rearrange
# things and eliminate variables.
AC_ARG_ENABLE(optimization,
       AC_HELP_STRING([--disable-optimization],
		      [disable compiler optimization]),
                      [if test $enableval = no ; then
                         CFLAGS=`echo $CFLAGS | sed 's/-O[[0-9]]//'`
                       fi])

# CFLAGS mangling when using gcc.
if test "$GCC" = yes; then
    CFLAGS="$CFLAGS -Wall"
    if test "$USE_MAINTAINER_MODE" = "yes"; then
        CFLAGS="$CFLAGS -Wcast-align -Wshadow -Wstrict-prototypes"
        CFLAGS="$CFLAGS -Wformat -Wno-format-y2k -Wformat-security"

        # If -Wno-missing-field-initializers is supported we can enable a
        # a bunch of really useful warnings.
        AC_MSG_CHECKING([if gcc supports -Wno-missing-field-initializers])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wno-missing-field-initializers"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
        AC_MSG_RESULT($_gcc_wopt)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -W -Wextra -Wbad-function-cast"
          CFLAGS="$CFLAGS -Wwrite-strings"
          CFLAGS="$CFLAGS -Wdeclaration-after-statement"
          CFLAGS="$CFLAGS -Wno-missing-field-initializers"
          CFLAGS="$CFLAGS -Wno-sign-compare"
        fi

        AC_MSG_CHECKING([if gcc supports -Wpointer-arith])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wpointer-arith"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
        AC_MSG_RESULT($_gcc_wopt)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -Wpointer-arith"
        fi
    fi

fi

# Check whether as(1) supports a noeexecstack feature.  This test
# includes an override option.
CL_AS_NOEXECSTACK


AC_SUBST(LIBGCRYPT_CONFIG_API_VERSION)
AC_SUBST(LIBGCRYPT_CONFIG_LIBS)
AC_SUBST(LIBGCRYPT_CONFIG_CFLAGS)
AC_SUBST(LIBGCRYPT_CONFIG_HOST)
AC_SUBST(LIBGCRYPT_THREAD_MODULES)

AC_CONFIG_COMMANDS([gcrypt-conf],[[
chmod +x src/libgcrypt-config
]],[[
prefix=$prefix
exec_prefix=$exec_prefix
libdir=$libdir
datadir=$datadir
DATADIRNAME=$DATADIRNAME
]])

#####################
#### Conclusion. ####
#####################

# Check that requested feature can actually be used and define
# ENABLE_foo_SUPPORT macros.

if test x"$aesnisupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_ssse3" != "yes" ; then
    aesnisupport="no (unsupported by compiler)"
  fi
fi
if test x"$pclmulsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_pclmul" != "yes" ; then
    pclmulsupport="no (unsupported by compiler)"
  fi
fi
if test x"$avxsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_avx" != "yes" ; then
    avxsupport="no (unsupported by compiler)"
  fi
fi
if test x"$avx2support" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_avx2" != "yes" ; then
    avx2support="no (unsupported by compiler)"
  fi
fi
if test x"$neonsupport" = xyes ; then
  if test "$gcry_cv_gcc_inline_asm_neon" != "yes" ; then
    neonsupport="no (unsupported by compiler)"
  fi
fi

if test x"$aesnisupport" = xyes ; then
  AC_DEFINE(ENABLE_AESNI_SUPPORT, 1,
            [Enable support for Intel AES-NI instructions.])
fi
if test x"$pclmulsupport" = xyes ; then
  AC_DEFINE(ENABLE_PCLMUL_SUPPORT, 1,
            [Enable support for Intel PCLMUL instructions.])
fi
if test x"$avxsupport" = xyes ; then
  AC_DEFINE(ENABLE_AVX_SUPPORT,1,
            [Enable support for Intel AVX instructions.])
fi
if test x"$avx2support" = xyes ; then
  AC_DEFINE(ENABLE_AVX2_SUPPORT,1,
            [Enable support for Intel AVX2 instructions.])
fi
if test x"$neonsupport" = xyes ; then
  AC_DEFINE(ENABLE_NEON_SUPPORT,1,
            [Enable support for ARM NEON instructions.])
fi
if test x"$padlocksupport" = xyes ; then
  AC_DEFINE(ENABLE_PADLOCK_SUPPORT, 1,
            [Enable support for the PadLock engine.])
fi
if test x"$drngsupport" = xyes ; then
  AC_DEFINE(ENABLE_DRNG_SUPPORT, 1,
            [Enable support for Intel DRNG (RDRAND instruction).])
fi


# Define conditional sources and config.h symbols depending on the
# selected ciphers, pubkey-ciphers, digests, kdfs, and random modules.

LIST_MEMBER(arcfour, $enabled_ciphers)
if test "$found" = "1"; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS arcfour.lo"
   AC_DEFINE(USE_ARCFOUR, 1, [Defined if this module should be included])
fi

LIST_MEMBER(blowfish, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish.lo"
   AC_DEFINE(USE_BLOWFISH, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS blowfish-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(cast5, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5.lo"
   AC_DEFINE(USE_CAST5, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS cast5-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(des, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS des.lo"
   AC_DEFINE(USE_DES, 1, [Defined if this module should be included])
fi

LIST_MEMBER(aes, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael.lo"
   AC_DEFINE(USE_AES, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS rijndael-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(twofish, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish.lo"
   AC_DEFINE(USE_TWOFISH, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-amd64.lo"
      ;;
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS twofish-arm.lo"
      ;;
   esac
fi

LIST_MEMBER(serpent, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent.lo"
   AC_DEFINE(USE_SERPENT, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the SSE2 implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-sse2-amd64.lo"
      ;;
   esac

   if test x"$avx2support" = xyes ; then
      # Build with the AVX2 implementation
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-avx2-amd64.lo"
   fi

   if test x"$neonsupport" = xyes ; then
      # Build with the NEON implementation
      GCRYPT_CIPHERS="$GCRYPT_CIPHERS serpent-armv7-neon.lo"
   fi
fi

LIST_MEMBER(rfc2268, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS rfc2268.lo"
   AC_DEFINE(USE_RFC2268, 1, [Defined if this module should be included])
fi

LIST_MEMBER(seed, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS seed.lo"
   AC_DEFINE(USE_SEED, 1, [Defined if this module should be included])
fi

LIST_MEMBER(camellia, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia.lo camellia-glue.lo"
   AC_DEFINE(USE_CAMELLIA, 1, [Defined if this module should be included])

   case "${host}" in
      arm*-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-arm.lo"
      ;;
   esac

   if test x"$avxsupport" = xyes ; then
      if test x"$aesnisupport" = xyes ; then
        # Build with the AES-NI/AVX implementation
        GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-aesni-avx-amd64.lo"
      fi
   fi

   if test x"$avx2support" = xyes ; then
      if test x"$aesnisupport" = xyes ; then
        # Build with the AES-NI/AVX2 implementation
        GCRYPT_CIPHERS="$GCRYPT_CIPHERS camellia-aesni-avx2-amd64.lo"
      fi
   fi
fi

LIST_MEMBER(idea, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS idea.lo"
   AC_DEFINE(USE_IDEA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(salsa20, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20.lo"
   AC_DEFINE(USE_SALSA20, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20-amd64.lo"
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_CIPHERS="$GCRYPT_CIPHERS salsa20-armv7-neon.lo"
   fi
fi

LIST_MEMBER(gost28147, $enabled_ciphers)
if test "$found" = "1" ; then
   GCRYPT_CIPHERS="$GCRYPT_CIPHERS gost28147.lo"
   AC_DEFINE(USE_GOST28147, 1, [Defined if this module should be included])
fi

LIST_MEMBER(dsa, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS dsa.lo"
   AC_DEFINE(USE_DSA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(rsa, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS rsa.lo"
   AC_DEFINE(USE_RSA, 1, [Defined if this module should be included])
fi

LIST_MEMBER(elgamal, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS elgamal.lo"
   AC_DEFINE(USE_ELGAMAL, 1, [Defined if this module should be included])
fi

LIST_MEMBER(ecc, $enabled_pubkey_ciphers)
if test "$found" = "1" ; then
   GCRYPT_PUBKEY_CIPHERS="$GCRYPT_PUBKEY_CIPHERS \
                          ecc.lo ecc-curves.lo ecc-misc.lo \
                          ecc-ecdsa.lo ecc-eddsa.lo ecc-gost.lo"
   AC_DEFINE(USE_ECC, 1, [Defined if this module should be included])
fi

LIST_MEMBER(crc, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS crc.lo"
   AC_DEFINE(USE_CRC, 1, [Defined if this module should be included])
fi

LIST_MEMBER(gostr3411-94, $enabled_digests)
if test "$found" = "1" ; then
   # GOST R 34.11-94 internally uses GOST 28147-89
   LIST_MEMBER(gost28147, $enabled_ciphers)
   if test "$found" = "1" ; then
      GCRYPT_DIGESTS="$GCRYPT_DIGESTS gostr3411-94.lo"
      AC_DEFINE(USE_GOST_R_3411_94, 1, [Defined if this module should be included])
   fi
fi

LIST_MEMBER(stribog, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS stribog.lo"
   AC_DEFINE(USE_GOST_R_3411_12, 1, [Defined if this module should be included])
fi

LIST_MEMBER(md4, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS md4.lo"
   AC_DEFINE(USE_MD4, 1, [Defined if this module should be included])
fi

LIST_MEMBER(md5, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS md5.lo"
   AC_DEFINE(USE_MD5, 1, [Defined if this module should be included])
fi

LIST_MEMBER(sha256, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256.lo"
   AC_DEFINE(USE_SHA256, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha256-ssse3-amd64.lo"
      ;;
   esac
fi

LIST_MEMBER(sha512, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512.lo"
   AC_DEFINE(USE_SHA512, 1, [Defined if this module should be included])

   case "${host}" in
      x86_64-*-*)
         # Build with the assembly implementation
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-ssse3-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx-amd64.lo"
         GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-avx2-bmi2-amd64.lo"
      ;;
   esac

   if test x"$neonsupport" = xyes ; then
     # Build with the NEON implementation
     GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha512-armv7-neon.lo"
   fi
fi

LIST_MEMBER(tiger, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS tiger.lo"
   AC_DEFINE(USE_TIGER, 1, [Defined if this module should be included])
fi

LIST_MEMBER(whirlpool, $enabled_digests)
if test "$found" = "1" ; then
   GCRYPT_DIGESTS="$GCRYPT_DIGESTS whirlpool.lo"
   AC_DEFINE(USE_WHIRLPOOL, 1, [Defined if this module should be included])
fi

# rmd160 and sha1 should be included always.
GCRYPT_DIGESTS="$GCRYPT_DIGESTS rmd160.lo sha1.lo"
AC_DEFINE(USE_RMD160, 1, [Defined if this module should be included])
AC_DEFINE(USE_SHA1, 1,   [Defined if this module should be included])

case "${host}" in
  x86_64-*-*)
    # Build with the assembly implementation
    GCRYPT_DIGESTS="$GCRYPT_DIGESTS sha1-ssse3-amd64.lo"
  ;;
esac

LIST_MEMBER(scrypt, $enabled_kdfs)
if test "$found" = "1" ; then
   GCRYPT_KDFS="$GCRYPT_KDFS scrypt.lo"
   AC_DEFINE(USE_SCRYPT, 1, [Defined if this module should be included])
fi

LIST_MEMBER(linux, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndlinux.lo"
   AC_DEFINE(USE_RNDLINUX, 1, [Defined if the /dev/random RNG should be used.])
fi

LIST_MEMBER(unix, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndunix.lo"
   AC_DEFINE(USE_RNDUNIX, 1, [Defined if the default Unix RNG should be used.])
   print_egd_notice=yes
fi

LIST_MEMBER(egd, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndegd.lo"
   AC_DEFINE(USE_RNDEGD, 1, [Defined if the EGD based RNG should be used.])
fi

LIST_MEMBER(w32, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndw32.lo"
   AC_DEFINE(USE_RNDW32, 1,
             [Defined if the Windows specific RNG should be used.])
fi

LIST_MEMBER(w32ce, $random_modules)
if test "$found" = "1" ; then
   GCRYPT_RANDOM="$GCRYPT_RANDOM rndw32ce.lo"
   AC_DEFINE(USE_RNDW32CE, 1,
             [Defined if the WindowsCE specific RNG should be used.])
fi

AC_SUBST([GCRYPT_CIPHERS])
AC_SUBST([GCRYPT_PUBKEY_CIPHERS])
AC_SUBST([GCRYPT_DIGESTS])
AC_SUBST([GCRYPT_KDFS])
AC_SUBST([GCRYPT_RANDOM])

AC_SUBST(LIBGCRYPT_CIPHERS, $enabled_ciphers)
AC_SUBST(LIBGCRYPT_PUBKEY_CIPHERS, $enabled_pubkey_ciphers)
AC_SUBST(LIBGCRYPT_DIGESTS, $enabled_digests)

# For printing the configuration we need a colon separated list of
# algorithm names.
tmp=`echo "$enabled_ciphers" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_CIPHERS, "$tmp",
                   [List of available cipher algorithms])
tmp=`echo "$enabled_pubkey_ciphers" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_PUBKEY_CIPHERS, "$tmp",
                   [List of available public key cipher algorithms])
tmp=`echo "$enabled_digests" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_DIGESTS, "$tmp",
                   [List of available digest algorithms])
tmp=`echo "$enabled_kdfs" | tr ' ' : `
AC_DEFINE_UNQUOTED(LIBGCRYPT_KDFS, "$tmp",
                   [List of available KDF algorithms])


#
# Define conditional sources depending on the used hardware platform.
# Note that all possible modules must also be listed in
# src/Makefile.am (EXTRA_libgcrypt_la_SOURCES).
#
GCRYPT_HWF_MODULES=
case "$mpi_cpu_arch" in
     x86)
        AC_DEFINE(HAVE_CPU_ARCH_X86, 1,   [Defined for the x86 platforms])
        GCRYPT_HWF_MODULES="hwf-x86.lo"
        ;;
     alpha)
        AC_DEFINE(HAVE_CPU_ARCH_ALPHA, 1, [Defined for Alpha platforms])
        ;;
     sparc)
        AC_DEFINE(HAVE_CPU_ARCH_SPARC, 1, [Defined for SPARC platforms])
        ;;
     mips)
        AC_DEFINE(HAVE_CPU_ARCH_MIPS, 1,  [Defined for MIPS platforms])
        ;;
     m68k)
        AC_DEFINE(HAVE_CPU_ARCH_M68K, 1,  [Defined for M68k platforms])
        ;;
     ppc)
        AC_DEFINE(HAVE_CPU_ARCH_PPC, 1,   [Defined for PPC platforms])
        ;;
     arm)
        AC_DEFINE(HAVE_CPU_ARCH_ARM, 1,   [Defined for ARM platforms])
        GCRYPT_HWF_MODULES="hwf-arm.lo"
        ;;
esac
AC_SUBST([GCRYPT_HWF_MODULES])


#
# Provide information about the build.
#
BUILD_REVISION="mym4_revision"
AC_SUBST(BUILD_REVISION)
AC_DEFINE_UNQUOTED(BUILD_REVISION, "$BUILD_REVISION",
                   [GIT commit id revision used to build this package])

changequote(,)dnl
BUILD_FILEVERSION=`echo "$VERSION" | sed 's/\([0-9.]*\).*/\1./;s/\./,/g'`
changequote([,])dnl
BUILD_FILEVERSION="${BUILD_FILEVERSION}mym4_revision_dec"
AC_SUBST(BUILD_FILEVERSION)

BUILD_TIMESTAMP=`date -u +%Y-%m-%dT%H:%M+0000 2>/dev/null || date`
AC_SUBST(BUILD_TIMESTAMP)
AC_DEFINE_UNQUOTED(BUILD_TIMESTAMP, "$BUILD_TIMESTAMP",
                   [The time this package was configured for a build])


# And create the files.
AC_CONFIG_FILES([
Makefile
m4/Makefile
compat/Makefile
mpi/Makefile
cipher/Makefile
random/Makefile
doc/Makefile
src/Makefile
src/gcrypt.h
src/libgcrypt-config
src/versioninfo.rc
tests/Makefile
])
AC_CONFIG_FILES([tests/hashtest-256g], [chmod +x tests/hashtest-256g])
AC_OUTPUT


detection_module="${GCRYPT_HWF_MODULES%.lo}"
test -n "$detection_module" || detection_module="none"

# Give some feedback
GCRY_MSG_SHOW([],[])
GCRY_MSG_SHOW([Libgcrypt],[v${VERSION} has been configured as follows:])
GCRY_MSG_SHOW([],[])
GCRY_MSG_SHOW([Platform:                 ],[$PRINTABLE_OS_NAME ($host)])
GCRY_MSG_SHOW([Hardware detection module:],[$detection_module])
GCRY_MSG_WRAP([Enabled cipher algorithms:],[$enabled_ciphers])
GCRY_MSG_WRAP([Enabled digest algorithms:],[$enabled_digests])
GCRY_MSG_WRAP([Enabled kdf algorithms:   ],[$enabled_kdfs])
GCRY_MSG_WRAP([Enabled pubkey algorithms:],[$enabled_pubkey_ciphers])
GCRY_MSG_SHOW([Random number generator:  ],[$random])
GCRY_MSG_SHOW([Using linux capabilities: ],[$use_capabilities])
GCRY_MSG_SHOW([Try using Padlock crypto: ],[$padlocksupport])
GCRY_MSG_SHOW([Try using AES-NI crypto:  ],[$aesnisupport])
GCRY_MSG_SHOW([Try using Intel PCLMUL:   ],[$pclmulsupport])
GCRY_MSG_SHOW([Try using DRNG (RDRAND):  ],[$drngsupport])
GCRY_MSG_SHOW([Try using Intel AVX:      ],[$avxsupport])
GCRY_MSG_SHOW([Try using Intel AVX2:     ],[$avx2support])
GCRY_MSG_SHOW([Try using ARM NEON:       ],[$neonsupport])
GCRY_MSG_SHOW([],[])

if test "$print_egd_notice" = "yes"; then
cat <<G10EOF

   The performance of the Unix random gatherer module (rndunix) is not
   very good and it does not keep the entropy pool over multiple
   invocations of Libgcrypt base applications.  The suggested way to
   overcome this problem is to use the

                 Entropy Gathering Daemon (EGD)

   which provides a entropy source for the whole system.  It is written
   in Perl and available at the GnuPG FTP servers.  To enable EGD you
   should rerun configure with the option "--enable-static-rnd=egd".
   For more information consult the GnuPG webpages:

             http://www.gnupg.org/download.html#egd

G10EOF
fi

if test "$gcry_cv_gcc_attribute_aligned" != "yes" ; then
cat <<G10EOF

   Please not that your compiler does not support the GCC style
   aligned attribute. Using this software may evoke bus errors.

G10EOF
fi

if test -n "$gpl"; then
  echo "Please note that you are building a version of Libgcrypt with"
  echo "  $gpl"
  echo "included.  These parts are licensed under the GPL and thus the"
  echo "use of this library has to comply with the conditions of the GPL."
fi
