# configure.ac for libgpg-error
# Copyright (C) 2003, 2004, 2006, 2010, 2013, 2014, 2015 g10 Code GmbH
#
# This file is part of libgpg-error.
#
# libgpg-error 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.
#
# libgpg-error 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 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.)
# The following lines are used by ./autogen.sh.
AC_PREREQ(2.59)
min_automake_version="1.14"

# To build a release you need to create a tag with the version number
# (git tag -s libgpg-error-n.m) and run "./autogen.sh --force".
# Please bump the version number immediately after the release, do
# another commit, and a 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], [19])

# 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])
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 'libgpg-error-[0-9].*[0-9]' --long|\
                        awk -F- '$4!=0{print"-beta"$4}']))
m4_define([mym4_isgit],m4_if(mym4_betastring,[],[no],[yes]))
m4_define([mym4_full_version],[mym4_version[]mym4_betastring])

AC_INIT([libgpg-error],[mym4_full_version],[http://bugs.gnupg.org])
# LT Version numbers, remember to change them just *before* a release.
#   (Code changed:			REVISION++)
#   (Interfaces added/removed/changed:	CURRENT++, REVISION=0)
#   (Interfaces added:			AGE++)
#   (Interfaces removed:		AGE=0)
# Note that added error codes don't constitute an interface change.
LIBGPG_ERROR_LT_CURRENT=15
LIBGPG_ERROR_LT_AGE=15
LIBGPG_ERROR_LT_REVISION=0
################################################

AC_SUBST(LIBGPG_ERROR_LT_CURRENT)
AC_SUBST(LIBGPG_ERROR_LT_AGE)
AC_SUBST(LIBGPG_ERROR_LT_REVISION)

VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x00" mym4_version_major \
                          mym4_version_minor)
AC_SUBST(VERSION_NUMBER)

AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([serial-tests dist-bzip2])
AM_MAINTAINER_MODE
AC_CONFIG_SRCDIR([src/err-sources.h.in])
AC_CONFIG_HEADER([config.h])
AC_CONFIG_MACRO_DIR([m4])
AM_SILENT_RULES

# We need to know about the host architecture to avoid spurious
# warnings.
AC_CANONICAL_HOST
AB_INIT

# Checks for programs.
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_AWK
AC_CHECK_TOOL(AR, ar, :)
AC_GNU_SOURCE

# Set some internal variables depending on the platform for later use.
have_w32_system=no
have_w64_system=no
have_w32ce_system=no
case "${host}" in
    x86_64-*mingw32*)
        have_w32_system=yes
        have_w64_system=yes
        ;;
    *-mingw32ce*)
        have_w32_system=yes
        have_w32ce_system=yes
        ;;
    *-mingw32*)
        have_w32_system=yes
        ;;
    *)
       ;;
esac


if test "$have_w32_system" != yes; then
  gl_THREADLIB_EARLY
fi

# We build libgpg-error with large file support so that we have a 64
# bit off_t.  Our external interface uses the gpgrt_off_t which is
# anyway specified as 64 bit.  Thus the same libgpg-error can be used
# by software which is not build with large file support.
AC_SYS_LARGEFILE


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


# We need to compile and run a program on the build machine.
dnl The AC_PROG_CC_FOR_BUILD macro in the AC archive is broken for
dnl autoconf 2.57.
dnl AC_PROG_CC_FOR_BUILD
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])


AH_BOTTOM([
/* Force using of NLS for W32 even if no libintl has been found.  This is
   okay because we have our own gettext implementation for W32.  */
#if defined(HAVE_W32_SYSTEM) && !defined(ENABLE_NLS)
#define ENABLE_NLS 1
#endif

/* Connect the generic estream-printf.c to our framework.  */
#define _ESTREAM_PRINTF_REALLOC _gpgrt_realloc
#define _ESTREAM_PRINTF_EXTRA_INCLUDE "gpgrt-int.h"

/* For building we need to define these macro.  */
#define GPG_ERR_ENABLE_GETTEXT_MACROS 1
#define GPG_ERR_ENABLE_ERRNO_MACROS 1
#define GPGRT_ENABLE_ES_MACROS 1
])


# Note, that autogen.sh greps for the next line.
AM_GNU_GETTEXT_VERSION([0.19.3])
AM_GNU_GETTEXT([external])

# Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS([stdlib.h locale.h stdint.h])
AC_FUNC_STRERROR_R
case "${host_os}" in
     solaris*)
     # All versions of Solaris from 2.4 have a thread-safe strerror().
     # Since Solaris 10, in addition strerror_r() exists.
     ;;
     *)
     AC_CHECK_FUNC([strerror_r], [],
AC_MSG_WARN([[Without strerror_r, gpg_strerror_r might not be thread-safe]]))
     ;;
esac

AC_CHECK_FUNCS([flockfile vasprintf])


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

AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)

# Find a 64 bit integer type to be used instead of off_t.  We prefer
# the standard integer types over int64_t and finally try long long.
if test "$ac_cv_sizeof_int" = "8"; then
   replacement_for_off_t="int"
elif test "$ac_cv_sizeof_long" = "8"; then
   replacement_for_off_t="long"
elif test "$ac_cv_header_stdint_h" = yes; then
   replacement_for_off_t="int64_t"
elif test "$ac_cv_sizeof_long_long" = "8"; then
   replacement_for_off_t="long long"
else
   AC_MSG_ERROR([[
***
*** No 64 bit signed integer type found.  Can't build this library.
***]])
fi
AC_DEFINE_UNQUOTED(REPLACEMENT_FOR_OFF_T, "$replacement_for_off_t",
                   [Used by mkheader to insert the replacement type.])



#
# Setup gcc specific options
#
AC_MSG_NOTICE([checking for cc features])
if test "$GCC" = yes; then
    # Check whether gcc does not emit a diagnostic for unknown -Wno-*
    # options.  This is the case for gcc >= 4.6
    AC_MSG_CHECKING([if gcc ignores unknown -Wno-* options])
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6 )
#kickerror
#endif]],[])],[_gcc_silent_wno=yes],[_gcc_silent_wno=no])
    AC_MSG_RESULT($_gcc_silent_wno)

    # Note that it is okay to use CFLAGS here because these are just
    # warning options and the user should have a chance of overriding
    # them.
    if test "$USE_MAINTAINER_MODE" = "yes"; then
        CFLAGS="$CFLAGS -O3 -Wall -Wcast-align -Wshadow -Wstrict-prototypes"
        CFLAGS="$CFLAGS -Wformat -Wno-format-y2k -Wformat-security"
        if test x"$_gcc_silent_wno" = xyes ; then
          _gcc_wopt=yes
        else
          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=$_gcc_cflags_save;
        fi
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -W -Wno-sign-compare -Wno-missing-field-initializers"
        fi

        AC_MSG_CHECKING([if gcc supports -Wdeclaration-after-statement])
        _gcc_cflags_save=$CFLAGS
        CFLAGS="-Wdeclaration-after-statement"
        AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
        AC_MSG_RESULT($_gcc_wopt)
        CFLAGS=$_gcc_cflags_save;
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -Wdeclaration-after-statement"
        fi
    else
        CFLAGS="$CFLAGS -Wall"
    fi

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

    # The undocumented option -Wno-psabi suppresses the annoying
    #   "the ABI of passing union with long double has changed in GCC 4.4"
    # which is emitted in estream-printf.c but entirely irrelvant
    # because that union is local to the file.
    if test x"$_gcc_silent_wno" = xyes ; then
       CFLAGS="$CFLAGS -Wno-psabi"
    fi
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 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(GPGRT_USE_VISIBILITY, 1,
             [Define to use the GNU C visibility attribute.])
   CFLAGS="$CFLAGS -fvisibility=hidden"
fi

#
# Check whether ld supports a version script.
# (Actually not a check but a list of systems which are known to support it.)
#
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")


#
# Check for thread library.
#
# 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 "$have_w32_system" = yes; then
  AC_DEFINE([USE_WINDOWS_THREADS], [1])
  LIBTHREAD=
  LTLIBTHREAD=
  LIBMULTITHREAD=
  LTLIBMULTITHREAD=
  THREADLIB_CPPFLAGS=""
  AC_SUBST([LIBTHREAD])
  AC_SUBST([LTLIBTHREAD])
  AC_SUBST([LIBMULTITHREAD])
  AC_SUBST([LTLIBMULTITHREAD])
else
  gl_LOCK
  if test "$gl_threads_api" = posix; then
    AC_CHECK_SIZEOF(pthread_mutex_t,,[AC_INCLUDES_DEFAULT
                                      #include <pthread.h>])
  fi
fi

#
# Prepare building of estream
#
estream_INIT

#
# Substitution used for gpg-error-config
#
GPG_ERROR_CONFIG_LIBS="-lgpg-error"
if test "x$LIBTHREAD" != x; then
  GPG_ERROR_CONFIG_LIBS="${GPG_ERROR_CONFIG_LIBS} ${LIBTHREAD}"
fi
if test "x$LIBMULTITHREAD" != x; then
  GPG_ERROR_CONFIG_MT_LIBS="${LIBMULTITHREAD}"
else
  GPG_ERROR_CONFIG_MT_LIBS=""
fi
GPG_ERROR_CONFIG_CFLAGS=""
if test "x$THREADLIB_CPPFLAGS" != x; then
  GPG_ERROR_CONFIG_MT_CFLAGS="${THREADLIB_CPPFLAGS}"
else
  GPG_ERROR_CONFIG_MT_CFLAGS=""
fi
GPG_ERROR_CONFIG_ISUBDIRAFTER=""
GPG_ERROR_CONFIG_HOST="$host"
AC_SUBST(GPG_ERROR_CONFIG_LIBS)
AC_SUBST(GPG_ERROR_CONFIG_CFLAGS)
AC_SUBST(GPG_ERROR_CONFIG_MT_LIBS)
AC_SUBST(GPG_ERROR_CONFIG_MT_CFLAGS)
AC_SUBST(GPG_ERROR_CONFIG_ISUBDIRAFTER)
AC_SUBST(GPG_ERROR_CONFIG_HOST)


#
# Special defines for certain platforms
#
force_use_syscfg=no
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_w64_system" = yes; then
      AC_DEFINE(HAVE_W64_SYSTEM,1,[Defined if we run on 64 bit W32 API system])
    fi
    if test "$have_w32ce_system" = yes; then
      AC_DEFINE(HAVE_W32CE_SYSTEM,1,[Defined if we run on WindowsCE])
      GPG_ERROR_CONFIG_ISUBDIRAFTER="gpg-extra"
    fi
    force_use_syscfg=yes
fi
if test x$cross_compiling = xyes; then
    force_use_syscfg=yes
fi

AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)
AM_CONDITIONAL(HAVE_W64_SYSTEM, test "$have_w64_system" = yes)
AM_CONDITIONAL(HAVE_W32CE_SYSTEM, test "$have_w32ce_system" = yes)
AM_CONDITIONAL(CROSS_COMPILING, test x$cross_compiling = xyes)
AM_CONDITIONAL(FORCE_USE_SYSCFG, test x$force_use_syscfg = xyes)

AC_DEFINE_UNQUOTED(HOST_TRIPLET_STRING, "$host", [The host triplet])


#
# 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_VERSION=`echo "$PACKAGE_VERSION"|sed 's/\([0-9.]*\).*/\1./'`
changequote([,])dnl
BUILD_VERSION="${BUILD_VERSION}0.mym4_revision_dec"
BUILD_FILEVERSION=`echo "${BUILD_VERSION}" | tr . ,`
AC_SUBST(BUILD_VERSION)
AC_SUBST(BUILD_FILEVERSION)

AC_ARG_ENABLE([build-timestamp],
              AC_HELP_STRING([--enable-build-timestamp],
                [set an explicit build timestamp for reproducibility.
                 (default is the current time in ISO-8601 format)]),
                [if test "$enableval" = "no"; then
                    BUILD_TIMESTAMP="<none>"
                 else
                    BUILD_TIMESTAMP="$enableval"
                 fi],
        [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])



AC_ARG_ENABLE(languages, AC_HELP_STRING([--disable-languages],
                        [do not build support for other languages than C]))
AM_CONDITIONAL([LANGUAGES_SOME], [test "x$enable_languages" != xno])

build_doc=yes
AC_ARG_ENABLE([doc], AC_HELP_STRING([--disable-doc],
                                    [do not build the documentation]),
                     build_doc=$enableval, build_doc=yes)
AM_CONDITIONAL([BUILD_DOC], [test "x$build_doc" != xno])


#
# Substitution
#
AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([doc/Makefile po/Makefile.in m4/Makefile])
AC_CONFIG_FILES([src/Makefile tests/Makefile])
AC_CONFIG_FILES([lang/Makefile lang/cl/Makefile lang/cl/gpg-error.asd])
AC_CONFIG_FILES([src/versioninfo.rc src/gpg-error.w32-manifest])
AC_CONFIG_FILES([src/gpg-error-config], [chmod +x src/gpg-error-config])

AC_OUTPUT

echo "
        $PACKAGE_NAME-$PACKAGE_VERSION prepared for make

        Revision: mym4_revision  (mym4_revision_dec)
        Platform: $host
"
if test "$gcry_cv_gcc_attribute_aligned" != "yes" ; then
cat <<G10EOF
***
***  Please note that your compiler does not support the GCC style
***  aligned attribute.  Using this software may evoke bus errors.
***
G10EOF
fi
