# configure.ac for Python bindings of GPGME
# Copyright (C) 2000 Werner Koch (dd9jn)
# Copyright (C) 2001-2021 g10 Code GmbH
#
# This file is part of GPGME.
#
# GPGME 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.
#
# GPGME 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 <https://gnu.org/licenses/>.
# SPDX-License-Identifier: LGPL-2.1-or-later

# (Process this file with autoconf to produce a configure script.)
AC_PREREQ([2.69])
min_automake_version="1.14"

# To build a release you need to create a tag with the version number
# "gpgmepy-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.  If you start a new
# series by bumping the minor (m) remember to also create a tag named
# "gpgmepy-n.m-base" as the start point for beta numbering.  See below
# for the LT versions.
m4_define([mym4_package],[gpgmepy])
m4_define([mym4_major], [2])
m4_define([mym4_minor], [0])
m4_define([mym4_micro], [0])

# Below is m4 magic to extract and compute the git revision number,
# the decimalized short revision number, a beta version string and a
# flag indicating a development version (mym4_isbeta).  Note that the
# m4 processing is done by autoconf and not during the configure run.
m4_define([mym4_verslist], m4_split(m4_esyscmd([./autogen.sh --find-version] \
                           mym4_package mym4_major mym4_minor mym4_micro),[:]))
m4_define([mym4_isbeta],       m4_argn(2, mym4_verslist))
m4_define([mym4_version],      m4_argn(4, mym4_verslist))
m4_define([mym4_revision],     m4_argn(7, mym4_verslist))
m4_define([mym4_revision_dec], m4_argn(8, mym4_verslist))
m4_define([mym4_commitid],     m4_argn(9, mym4_verslist))
m4_esyscmd([echo ]mym4_version[>VERSION])
m4_esyscmd([echo ]mym4_commitid[>>VERSION])
AC_INIT([mym4_package],[mym4_version],[https://bugs.gnupg.org])

################################################

NEED_GPG_ERROR_VERSION=1.47
NEED_GPGME_VERSION=1.7.0

VERSION_MAJOR=mym4_major
VERSION_MINOR=mym4_minor
VERSION_MICRO=mym4_micro

AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([serial-tests dist-bzip2 no-dist-gzip])
AM_MAINTAINER_MODE
AC_CANONICAL_HOST
AM_SILENT_RULES
AC_ARG_VAR(SYSROOT,[locate config scripts also below that directory])

# Enable GNU extensions on systems that have them.
AC_USE_SYSTEM_EXTENSIONS

# Taken from mpfr-4.0.1, then modified for LDADD_FOR_TESTS_KLUDGE
dnl Under Linux, make sure that the old dtags are used if LD_LIBRARY_PATH
dnl is defined. The issue is that with the new dtags, LD_LIBRARY_PATH has
dnl the precedence over the run path, so that if a compatible MPFR library
dnl is installed in some directory from $LD_LIBRARY_PATH, then the tested
dnl MPFR library will be this library instead of the MPFR library from the
dnl build tree. Other OS with the same issue might be added later.
dnl
dnl References:
dnl   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=859732
dnl   http://lists.gnu.org/archive/html/libtool/2017-05/msg00000.html
dnl
dnl We need to check whether --disable-new-dtags is supported as alternate
dnl linkers may be used (e.g., with tcc: CC=tcc LD=tcc).
dnl
case $host in
  *-*-linux*)
    if test -n "$LD_LIBRARY_PATH"; then
      saved_LDFLAGS="$LDFLAGS"
      LDADD_FOR_TESTS_KLUDGE="-Wl,--disable-new-dtags"
      LDFLAGS="$LDFLAGS $LDADD_FOR_TESTS_KLUDGE"
      AC_MSG_CHECKING(whether --disable-new-dtags is supported by the linker)
      AC_LINK_IFELSE([AC_LANG_SOURCE([[
int main (void) { return 0; }
      ]])],
      [AC_MSG_RESULT(yes (use it since LD_LIBRARY_PATH is set))],
      [AC_MSG_RESULT(no)
       LDADD_FOR_TESTS_KLUDGE=""
      ])
      LDFLAGS="$saved_LDFLAGS"
    fi
    ;;
esac
AC_SUBST([LDADD_FOR_TESTS_KLUDGE])

AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX

# Note: A suitable gitlog-to-changelog script can be found in GnuPG master.
AC_CHECK_PROGS(GITLOG_TO_CHANGELOG, gitlog-to-changelog, [gitlog-to-changelog])

AC_SUBST(VERSION_MAJOR)
AC_SUBST(VERSION_MINOR)
AC_SUBST(VERSION_MICRO)

VERSION_NUMBER=m4_esyscmd(printf "0x%02x%02x%02x" mym4_major \
                          mym4_minor mym4_micro)
AC_SUBST(VERSION_NUMBER)

# 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])


# Don't default to build static libs.
LT_PREREQ([2.2.6])
LT_INIT([win32-dll disable-static])
LT_LANG([Windows Resource])

# For now we hardcode the use of version scripts.  It would be better
# to write a test for this or even implement this within libtool.
have_ld_version_script=no
case "${host}" in
    *-*-linux*)
	have_ld_version_script=yes
        ;;
    *-*-gnu*)
	have_ld_version_script=yes
        ;;
    *-apple-darwin*)
        AC_DEFINE(_DARWIN_C_SOURCE, 1,
                  Expose all libc features (__DARWIN_C_FULL).)
        AC_DEFINE(_XOPEN_SOURCE, 500, Activate POSIX interface on MacOS X)
        ;;
esac

AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

#
# Specify how we support our local modification of libtool for Windows
# 64-bit.  Options are:
#
# (1) apply: when appying patch fails, it results failure of entire build
# (2) never: never apply the patch (no try)
# (3) try: use patched if it goes well, use original if fails
#
AC_ARG_WITH([libtool-modification],
  AS_HELP_STRING([--with-libtool-modification=apply|never|try],
                 [how to handle libtool modification (default=never)]),
                 build_libtool_modification=$withval,
                 build_libtool_modification=never)

#
# Apply a patch (locally maintained one of ours) to libtool
#
case $host in
  x86_64-*mingw32*)
AC_CONFIG_COMMANDS([libtool-patch],[[
  if test "$build_selection" = never; then
    echo "patch not applied"
  elif (mv -f libtool libtool.orig; \
        sed -f $srcdir/build-aux/libtool-patch.sed libtool.orig >libtool); then
    echo "applied successfully"
  elif test "$build_selection" = try; then
    mv -f libtool.orig libtool
    echo "patch failed, thus, using original"
  else
    echo "patch failed"
    as_fn_exit 1
  fi
]],[build_selection=$build_libtool_modification])
  ;;
  *)
  ;;
esac

GPG_DEFAULT=no
GPGSM_DEFAULT=no
GPGCONF_DEFAULT=no
G13_DEFAULT=no
component_system=None
have_dosish_system=no
have_android_system=no
have_w32_system=no
have_w64_system=no
have_macos_system=no
case "${host}" in
    x86_64-*mingw32*)
        have_w64_system=yes
        ;;
    *-linux-androideabi)
        have_android_system=yes
        ;;
    *-apple-darwin*)
        have_macos_system=yes
        ;;
esac
case "${host}" in
    *-mingw32*)
	have_dosish_system=yes
        have_w32_system=yes
        GPG_DEFAULT='c:\\gnupg\\gpg.exe'
	GPGSM_DEFAULT='c:\\gnupg\\gpgsm.exe'
        GPGCONF_DEFAULT='c:\\gnupg\\gpgconf.exe'
        G13_DEFAULT='c:\\gnupg\\g13.exe'
        #component_system='COM+'
       ;;
    *)

	# XXX: Probably use exec-prefix here?
#	GPG_DEFAULT='/usr/bin/gpg'
#	GPGSM_DEFAULT='/usr/bin/gpgsm'
#	GPGCONF_DEFAULT='/usr/bin/gpgconf'
#	G13_DEFAULT='/usr/bin/g13'
	;;
esac

if test "$have_dosish_system" = yes; then
   AC_DEFINE(HAVE_DOSISH_SYSTEM,1,
             [Defined if we run on some of the PCDOS like systems
              (DOS, Windoze. OS/2) with special properties like
              no file modes])
fi
AM_CONDITIONAL(HAVE_DOSISH_SYSTEM, test "$have_dosish_system" = yes)

if test "$have_w32_system" = yes; then
   AC_DEFINE(HAVE_W32_SYSTEM,1,
             [Defined if we run on any kind of W32 API based system])
fi
AM_CONDITIONAL(HAVE_W32_SYSTEM, test "$have_w32_system" = yes)

if test "$have_w64_system" = yes; then
   AC_DEFINE(HAVE_W64_SYSTEM,1,
             [Defined if we run on a 64 bit W32 API based system])
fi
AM_CONDITIONAL(HAVE_W64_SYSTEM, test "$have_w64_system" = yes)

if test "$have_android_system" = yes; then
   AC_DEFINE(HAVE_ANDROID_SYSTEM,1, [Defined if we build for an Android system])
fi
AM_CONDITIONAL(HAVE_ANDROID_SYSTEM, test "$have_android_system" = yes)

if test "$have_macos_system" = yes; then
   AC_DEFINE(HAVE_MACOS_SYSTEM,1,
             [Defined if we build for an MacOS system])
fi
AM_CONDITIONAL(HAVE_MACOS_SYSTEM, test "$have_macos_system" = yes)


# Python bindings.
AX_PKG_SWIG
if test -z "$SWIG"; then
    AC_MSG_ERROR([[
***
*** You need SWIG to build the Python bindings.
***]])
else
    # Reset the version collecting vars.
    PYTHONS=
    PYTHON_VERSIONS=

    # Reset everything, so that we can look for another Python.
    # Only look for Python versions explicitly that are not yet end-of-life.
    # As fallback look for any Python version >= 3.6.
    m4_foreach([mym4pythonver],
               [[3.9],[3.10],[3.11],[3.12],[3.13],[any]],
        [unset PYTHON
        unset PYTHON_VERSION
        unset PYTHON_CPPFLAGS
        unset PYTHON_LDFLAGS
        unset PYTHON_LIBS
        unset PYTHON_SITE_PKG
        unset PYTHON_PLATFORM_SITE_PKG
        unset PYTHON_EXTRA_LIBS
        unset PYTHON_EXTRA_LDFLAGS
        unset ac_cv_path_PYTHON
        unset am_cv_pathless_PYTHON
        unset am_cv_python_version
        unset am_cv_python_platform
        unset am_cv_python_pythondir
        unset am_cv_python_pyexecdir
        AM_PATH_PYTHON(m4_if(mym4pythonver,[any],[3.6],mym4pythonver), [
            AX_PYTHON_DEVEL([], [true])
            if test "$PYTHON_VERSION"; then
                AC_MSG_CHECKING([for the setuptools Python package])
                ac_setuptools_result=`$PYTHON -c "import setuptools" 2>&1`
                if test $? -eq 0; then
                    AC_MSG_RESULT([yes])
                else
                    AC_MSG_RESULT([no])
                    AC_MSG_WARN([
*** cannot import Python module "setuptools".
*** Please check your Python installation. The error was:
*** $ac_setuptools_result])
                    PYTHON_VERSION=""
                fi
            fi
            if test "$PYTHON_VERSION"; then
                    PYTHONS="$(echo $PYTHONS $PYTHON)"
                    PYTHON_VERSIONS="$(echo $PYTHON_VERSIONS $PYTHON_VERSION)"
            fi
        ], :, m4_if(mym4pythonver,[any],[],[python]mym4pythonver))
        ])

    # Recover some values lost in the second attempt to find Python.
    PYTHON="$(echo $PYTHONS | cut -d ' ' -f 1)"
    PYTHON_VERSION="$(echo $PYTHON_VERSIONS | cut -d ' ' -f 1)"

    # Remove duplicates.
    PYTHONS="$(echo $PYTHONS | tr '[[:space:]]' '\n' | sort | uniq | tr '\n' ' ' | sed -e 's/ $//')"
    PYTHON_VERSIONS="$(echo $PYTHON_VERSIONS | tr '[[:space:]]' '\n' | sort | uniq | tr '\n' ' ' | sed -e 's/ $//')"

    # Debian: Avoid relying on the hard-coded list of python versions being up to date:
    PYTHONS="$(py3versions -s | tr ' ' '\n' | sed s,^,/usr/bin/, | tr '\n' ' ')"
    PYTHON_VERSIONS="$(py3versions -sv)"

    if test -z "$PYTHON_VERSIONS"; then
        AC_MSG_ERROR([[
***
*** Please install the python development packages.
***]])
    fi

    AC_SUBST(PYTHONS, $PYTHONS)
fi

#
# Provide information about the build.
#
BUILD_REVISION="mym4_revision"
BUILD_COMMITID="mym4_commitid"
AC_SUBST(BUILD_REVISION)
AC_DEFINE_UNQUOTED(BUILD_REVISION, "$BUILD_REVISION",
                   [GIT short commit id used to build this package])
AC_DEFINE_UNQUOTED(BUILD_COMMITID, "$BUILD_COMMITID",
                   [Git commit id used to build this package])


#
# Options to disable some regression tests
#
run_gpg_test="yes"
AC_ARG_ENABLE(gpg-test,
  AS_HELP_STRING([--disable-gpg-test],[disable GPG regression test]),
         run_gpg_test=$enableval)
AM_CONDITIONAL(RUN_GPG_TESTS, test "$run_gpg_test" = "yes")


# Type checks.
AC_CHECK_SIZEOF(unsigned int)
AC_SYS_LARGEFILE


# Checks for compiler features.
if test "$GCC" = yes; then
    CFLAGS="$CFLAGS -Wall -Wcast-align -Wshadow -Wstrict-prototypes"
    CFLAGS="$CFLAGS -Wno-format-y2k"

    # If -Wno-missing-field-initializers is supported we can expect a
    # a larger set of warning options.
    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="$CFLAGS -Wno-missing-field-initializers"
      CFLAGS="$CFLAGS -Wno-sign-compare"
      CFLAGS="$CFLAGS -Wno-format-zero-length"
      CFLAGS="$CFLAGS -Wno-format-truncation"
      CFLAGS="$CFLAGS -Wno-sizeof-pointer-div"
    fi
    if test "$USE_MAINTAINER_MODE" = "yes"; then
        if test x"$_gcc_wopt" = xyes ; then
          CFLAGS="$CFLAGS -W -Wextra -Wbad-function-cast"
          CFLAGS="$CFLAGS -Wwrite-strings"
          CFLAGS="$CFLAGS -Wdeclaration-after-statement"
        fi
        CFLAGS="$CFLAGS -Wformat -Wformat-security"
        CXXFLAGS="$CXXFLAGS -Wall -Wextra -Wno-shadow"

        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="$CFLAGS -Wpointer-arith"
        fi
    fi
    if test "$have_w32_system" = yes; then
       CFLAGS="$CFLAGS -mms-bitfields"
    fi
fi


# Checks for library functions.
AC_MSG_NOTICE([checking for libraries])

# Checking for libgpg-error.
have_gpg_error=no
AM_PATH_GPG_ERROR("$NEED_GPG_ERROR_VERSION",
                  have_gpg_error=yes, have_gpg_error=no)
AC_DEFINE(GPG_ERR_SOURCE_DEFAULT, GPG_ERR_SOURCE_GPGME,
          [The default error source for GPGME.])

AM_CONDITIONAL(USE_GPGRT_CONFIG, [test -n "$GPGRT_CONFIG" \
                                  -a "$ac_cv_path_GPG_ERROR_CONFIG" = no])

# And for gpgme.
have_gpgme=no
AM_PATH_GPGME("$NEED_GPGME_VERSION",
              have_gpgme=yes, have_gpgme=no)


#
# Other checks
#

# Last check.
die=no
if test "$have_gpg_error" = "no"; then
   die=yes
   AC_MSG_NOTICE([[
***
*** You need libgpg-error to build this program.
**  This library is for example available at
***   https://www.gnupg.org/ftp/gcrypt/libgpg-error/
*** (at least version $NEED_GPG_ERROR_VERSION is required.)
***]])
fi
if test "$have_gpgme" = "no"; then
   die=yes
   AC_MSG_NOTICE([[
***
*** You need gpgme to build this program.
*** This library is for example available at
***   https://www.gnupg.org/ftp/gcrypt/gpgme/
*** (at least version $NEED_GPGME_VERSION is required).
***]])
fi

if test "$die" = "yes"; then
    AC_MSG_ERROR([[
***
*** Required libraries not found. Please consult the above messages
*** and install them before running configure again.
***]])
fi


#
# Create config files

AC_CONFIG_FILES([Makefile
		 version.py
		 tests/Makefile
		 src/Makefile
		 examples/Makefile
		 doc/Makefile])
AC_CONFIG_FILES([setup.py], [chmod a+x setup.py])
AC_OUTPUT

echo "
        GPGMEPY v${VERSION} has been configured as follows:

        Revision:          mym4_revision  (mym4_revision_dec)
        Platform:          $host

        Python versions:   $PYTHON_VERSIONS
"
if test "x${gpg_config_script_warn}" != x; then
cat <<G10EOF
        Mismatches between the target platform and the to
        be used libraries have been been detected for:
         ${gpg_config_script_warn}
        Please check above for warning messages.

G10EOF
fi