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# libgcrypt.m4 - Autoconf macros to detect libgcrypt
# Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020 g10 Code GmbH
#
# This file is free software; as a special exception the author gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
#
# This file is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Last-changed: 2020-09-27
dnl AM_PATH_LIBGCRYPT([MINIMUM-VERSION,
dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
dnl Test for libgcrypt and define LIBGCRYPT_CFLAGS and LIBGCRYPT_LIBS.
dnl MINIMUM-VERSION is a string with the version number optionally prefixed
dnl with the API version to also check the API compatibility. Example:
dnl a MINIMUM-VERSION of 1:1.2.5 won't pass the test unless the installed
dnl version of libgcrypt is at least 1.2.5 *and* the API number is 1. Using
dnl this features allows to prevent build against newer versions of libgcrypt
dnl with a changed API.
dnl
dnl If a prefix option is not used, the config script is first
dnl searched in $SYSROOT/bin and then along $PATH. If the used
dnl config script does not match the host specification the script
dnl is added to the gpg_config_script_warn variable.
dnl
AC_DEFUN([AM_PATH_LIBGCRYPT],
[ AC_REQUIRE([AC_CANONICAL_HOST])
AC_ARG_WITH(libgcrypt-prefix,
AS_HELP_STRING([--with-libgcrypt-prefix=PFX],
[prefix where LIBGCRYPT is installed (optional)]),
libgcrypt_config_prefix="$withval", libgcrypt_config_prefix="")
if test x"${LIBGCRYPT_CONFIG}" = x ; then
if test x"${libgcrypt_config_prefix}" != x ; then
LIBGCRYPT_CONFIG="${libgcrypt_config_prefix}/bin/libgcrypt-config"
fi
fi
use_gpgrt_config=""
if test x"${LIBGCRYPT_CONFIG}" = x -a x"$GPGRT_CONFIG" != x -a "$GPGRT_CONFIG" != "no"; then
if $GPGRT_CONFIG libgcrypt --exists; then
LIBGCRYPT_CONFIG="$GPGRT_CONFIG libgcrypt"
AC_MSG_NOTICE([Use gpgrt-config as libgcrypt-config])
use_gpgrt_config=yes
fi
fi
if test -z "$use_gpgrt_config"; then
if test x"${LIBGCRYPT_CONFIG}" = x ; then
case "${SYSROOT}" in
/*)
if test -x "${SYSROOT}/bin/libgcrypt-config" ; then
LIBGCRYPT_CONFIG="${SYSROOT}/bin/libgcrypt-config"
fi
;;
'')
;;
*)
AC_MSG_WARN([Ignoring \$SYSROOT as it is not an absolute path.])
;;
esac
fi
AC_PATH_PROG(LIBGCRYPT_CONFIG, libgcrypt-config, no)
fi
tmp=ifelse([$1], ,1:1.2.0,$1)
if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
req_libgcrypt_api=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\1/'`
min_libgcrypt_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
else
req_libgcrypt_api=0
min_libgcrypt_version="$tmp"
fi
AC_MSG_CHECKING(for LIBGCRYPT - version >= $min_libgcrypt_version)
ok=no
if test "$LIBGCRYPT_CONFIG" != "no" ; then
req_major=`echo $min_libgcrypt_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
req_minor=`echo $min_libgcrypt_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
req_micro=`echo $min_libgcrypt_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
if test -z "$use_gpgrt_config"; then
libgcrypt_config_version=`$LIBGCRYPT_CONFIG --version`
else
libgcrypt_config_version=`$LIBGCRYPT_CONFIG --modversion`
fi
major=`echo $libgcrypt_config_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
minor=`echo $libgcrypt_config_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
micro=`echo $libgcrypt_config_version | \
sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`
if test "$major" -gt "$req_major"; then
ok=yes
else
if test "$major" -eq "$req_major"; then
if test "$minor" -gt "$req_minor"; then
ok=yes
else
if test "$minor" -eq "$req_minor"; then
if test "$micro" -ge "$req_micro"; then
ok=yes
fi
fi
fi
fi
fi
fi
if test $ok = yes; then
AC_MSG_RESULT([yes ($libgcrypt_config_version)])
else
AC_MSG_RESULT(no)
fi
if test $ok = yes; then
# If we have a recent libgcrypt, we should also check that the
# API is compatible
if test "$req_libgcrypt_api" -gt 0 ; then
if test -z "$use_gpgrt_config"; then
tmp=`$LIBGCRYPT_CONFIG --api-version 2>/dev/null || echo 0`
else
tmp=`$LIBGCRYPT_CONFIG --variable=api_version 2>/dev/null || echo 0`
fi
if test "$tmp" -gt 0 ; then
AC_MSG_CHECKING([LIBGCRYPT API version])
if test "$req_libgcrypt_api" -eq "$tmp" ; then
AC_MSG_RESULT([okay])
else
ok=no
AC_MSG_RESULT([does not match. want=$req_libgcrypt_api got=$tmp])
fi
fi
fi
fi
if test $ok = yes; then
LIBGCRYPT_CFLAGS=`$LIBGCRYPT_CONFIG --cflags`
LIBGCRYPT_LIBS=`$LIBGCRYPT_CONFIG --libs`
ifelse([$2], , :, [$2])
if test -z "$use_gpgrt_config"; then
libgcrypt_config_host=`$LIBGCRYPT_CONFIG --host 2>/dev/null || echo none`
else
libgcrypt_config_host=`$LIBGCRYPT_CONFIG --variable=host 2>/dev/null || echo none`
fi
if test x"$libgcrypt_config_host" != xnone ; then
if test x"$libgcrypt_config_host" != x"$host" ; then
AC_MSG_WARN([[
***
*** The config script "$LIBGCRYPT_CONFIG" was
*** built for $libgcrypt_config_host and thus may not match the
*** used host $host.
*** You may want to use the configure option --with-libgcrypt-prefix
*** to specify a matching config script or use \$SYSROOT.
***]])
gpg_config_script_warn="$gpg_config_script_warn libgcrypt"
fi
fi
else
LIBGCRYPT_CFLAGS=""
LIBGCRYPT_LIBS=""
ifelse([$3], , :, [$3])
fi
AC_SUBST(LIBGCRYPT_CFLAGS)
AC_SUBST(LIBGCRYPT_LIBS)
])

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