m4/gpg-error.m4

   1 # gpg-error.m4 - autoconf macro to detect libgpg-error.
   2 # Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020, 2021
   3 #               g10 Code GmbH
   4 #
   5 # This file is free software; as a special exception the author gives
   6 # unlimited permission to copy and/or distribute it, with or without
   7 # modifications, as long as this notice is preserved.
   8 #
   9 # This file is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
  11 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12 #
  13 # Last-changed: 2022-09-21
  14
  15
  16 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
  17 dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
  18 dnl
  19 dnl Test for libgpg-error and define GPG_ERROR_CFLAGS, GPG_ERROR_LIBS,
  20 dnl GPG_ERROR_MT_CFLAGS, and GPG_ERROR_MT_LIBS.  The _MT_ variants are
  21 dnl used for programs requireing real multi thread support.
  22 dnl
  23 dnl If a prefix option is not used, the config script is first
  24 dnl searched in $SYSROOT/bin and then along $PATH.  If the used
  25 dnl config script does not match the host specification the script
  26 dnl is added to the gpg_config_script_warn variable.
  27 dnl
  28 AC_DEFUN([AM_PATH_GPG_ERROR],
  29 [ AC_REQUIRE([AC_CANONICAL_HOST])
  30   gpg_error_config_prefix=""
  31   dnl --with-libgpg-error-prefix=PFX is the preferred name for this option,
  32   dnl since that is consistent with how our three siblings use the directory/
  33   dnl package name in --with-$dir_name-prefix=PFX.
  34   AC_ARG_WITH(libgpg-error-prefix,
  35               AS_HELP_STRING([--with-libgpg-error-prefix=PFX],
  36                              [prefix where GPG Error is installed (optional)]),
  37               [gpg_error_config_prefix="$withval"])
  38
  39   dnl Accept --with-gpg-error-prefix and make it work the same as
  40   dnl --with-libgpg-error-prefix above, for backwards compatibility,
  41   dnl but do not document this old, inconsistently-named option.
  42   AC_ARG_WITH(gpg-error-prefix,,
  43               [gpg_error_config_prefix="$withval"])
  44
  45   if test x"${GPG_ERROR_CONFIG}" = x ; then
  46      if test x"${gpg_error_config_prefix}" != x ; then
  47         GPG_ERROR_CONFIG="${gpg_error_config_prefix}/bin/gpg-error-config"
  48      else
  49        case "${SYSROOT}" in
  50          /*)
  51            if test -x "${SYSROOT}/bin/gpg-error-config" ; then
  52              GPG_ERROR_CONFIG="${SYSROOT}/bin/gpg-error-config"
  53            fi
  54            ;;
  55          '')
  56            ;;
  57           *)
  58            AC_MSG_WARN([Ignoring \$SYSROOT as it is not an absolute path.])
  59            ;;
  60        esac
  61      fi
  62   fi
  63
  64   AC_PATH_PROG(GPG_ERROR_CONFIG, gpg-error-config, no)
  65   min_gpg_error_version=ifelse([$1], ,1.33,$1)
  66   ok=no
  67
  68   AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no, [$prefix/bin:$PATH])
  69   if test "$GPGRT_CONFIG" != "no"; then
  70     # Determine gpgrt_libdir
  71     #
  72     # Get the prefix of gpgrt-config assuming it's something like:
  73     #   <PREFIX>/bin/gpgrt-config
  74     gpgrt_prefix=${GPGRT_CONFIG%/*/*}
  75     possible_libdir1=${gpgrt_prefix}/lib
  76     # Determine by using system libdir-format with CC, it's like:
  77     #   Normal style: /usr/lib
  78     #   GNU cross style: /usr/<triplet>/lib
  79     #   Debian style: /usr/lib/<multiarch-name>
  80     #   Fedora/openSUSE style: /usr/lib, /usr/lib32 or /usr/lib64
  81     # It is assumed that CC is specified to the one of host on cross build.
  82     if libdir_candidates=$(${CC:-cc} -print-search-dirs | \
  83           sed -n -e "/^libraries/{s/libraries: =//;s/:/\\
  84 /g;p;}"); then
  85       # From the output of -print-search-dirs, select valid pkgconfig dirs.
  86       libdir_candidates=$(for dir in $libdir_candidates; do
  87         if p=$(cd $dir 2>/dev/null && pwd); then
  88           test -d "$p/pkgconfig" && echo $p;
  89         fi
  90       done)
  91
  92       for possible_libdir0 in $libdir_candidates; do
  93         # possible_libdir0:
  94         #   Fallback candidate, the one of system-installed (by $CC)
  95         #   (/usr/<triplet>/lib, /usr/lib/<multiarch-name> or /usr/lib32)
  96         # possible_libdir1:
  97         #   Another candidate, user-locally-installed
  98         #   (<gpgrt_prefix>/lib)
  99         # possible_libdir2
 100         #   Most preferred
 101         #   (<gpgrt_prefix>/<triplet>/lib,
 102         #    <gpgrt_prefix>/lib/<multiarch-name> or <gpgrt_prefix>/lib32)
 103         if test "${possible_libdir0##*/}" = "lib"; then
 104           possible_prefix0=${possible_libdir0%/lib}
 105           possible_prefix0_triplet=${possible_prefix0##*/}
 106           if test -z "$possible_prefix0_triplet"; then
 107             continue
 108           fi
 109           possible_libdir2=${gpgrt_prefix}/$possible_prefix0_triplet/lib
 110         else
 111           possible_prefix0=${possible_libdir0%%/lib*}
 112           possible_libdir2=${gpgrt_prefix}${possible_libdir0#$possible_prefix0}
 113         fi
 114         if test -f ${possible_libdir2}/pkgconfig/gpg-error.pc; then
 115           gpgrt_libdir=${possible_libdir2}
 116         elif test -f ${possible_libdir1}/pkgconfig/gpg-error.pc; then
 117           gpgrt_libdir=${possible_libdir1}
 118         elif test -f ${possible_libdir0}/pkgconfig/gpg-error.pc; then
 119           gpgrt_libdir=${possible_libdir0}
 120         fi
 121         if test -n "$gpgrt_libdir"; then break; fi
 122       done
 123       if test -z "$libdir_candidates"; then
 124         # No valid pkgconfig dir in any of the system directories, fallback
 125         gpgrt_libdir=${possible_libdir1}
 126       fi
 127     else
 128       # When we cannot determine system libdir-format, use this:
 129       gpgrt_libdir=${possible_libdir1}
 130     fi
 131   else
 132     unset GPGRT_CONFIG
 133   fi
 134
 135   if test -n "$gpgrt_libdir"; then
 136     GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir"
 137     if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then
 138       GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error"
 139       AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config])
 140       gpg_error_config_version=`$GPG_ERROR_CONFIG --modversion`
 141     else
 142       unset GPGRT_CONFIG
 143     fi
 144   elif test "$GPG_ERROR_CONFIG" != "no"; then
 145     gpg_error_config_version=`$GPG_ERROR_CONFIG --version`
 146     unset GPGRT_CONFIG
 147   fi
 148   if test "$GPG_ERROR_CONFIG" != "no"; then
 149     req_major=`echo $min_gpg_error_version | \
 150                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
 151     req_minor=`echo $min_gpg_error_version | \
 152                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
 153     major=`echo $gpg_error_config_version | \
 154                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
 155     minor=`echo $gpg_error_config_version | \
 156                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
 157     if test "$major" -gt "$req_major"; then
 158         ok=yes
 159     else
 160         if test "$major" -eq "$req_major"; then
 161             if test "$minor" -ge "$req_minor"; then
 162                ok=yes
 163             fi
 164         fi
 165     fi
 166   fi
 167   AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version)
 168   if test $ok = yes; then
 169     GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG --cflags`
 170     GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG --libs`
 171     if test -z "$GPGRT_CONFIG"; then
 172       GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --mt --cflags 2>/dev/null`
 173       GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --mt --libs 2>/dev/null`
 174     else
 175       GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --variable=mtcflags 2>/dev/null`
 176       GPG_ERROR_MT_CFLAGS="$GPG_ERROR_CFLAGS${GPG_ERROR_CFLAGS:+ }$GPG_ERROR_MT_CFLAGS"
 177       GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --variable=mtlibs 2>/dev/null`
 178       GPG_ERROR_MT_LIBS="$GPG_ERROR_LIBS${GPG_ERROR_LIBS:+ }$GPG_ERROR_MT_LIBS"
 179     fi
 180     AC_MSG_RESULT([yes ($gpg_error_config_version)])
 181     ifelse([$2], , :, [$2])
 182     if test -z "$GPGRT_CONFIG"; then
 183       gpg_error_config_host=`$GPG_ERROR_CONFIG --host 2>/dev/null || echo none`
 184     else
 185       gpg_error_config_host=`$GPG_ERROR_CONFIG --variable=host 2>/dev/null || echo none`
 186     fi
 187     if test x"$gpg_error_config_host" != xnone ; then
 188       if test x"$gpg_error_config_host" != x"$host" ; then
 189   AC_MSG_WARN([[
 190 ***
 191 *** The config script "$GPG_ERROR_CONFIG" was
 192 *** built for $gpg_error_config_host and thus may not match the
 193 *** used host $host.
 194 *** You may want to use the configure option --with-libgpg-error-prefix
 195 *** to specify a matching config script or use \$SYSROOT.
 196 ***]])
 197         gpg_config_script_warn="$gpg_config_script_warn libgpg-error"
 198       fi
 199     fi
 200   else
 201     GPG_ERROR_CFLAGS=""
 202     GPG_ERROR_LIBS=""
 203     GPG_ERROR_MT_CFLAGS=""
 204     GPG_ERROR_MT_LIBS=""
 205     AC_MSG_RESULT(no)
 206     ifelse([$3], , :, [$3])
 207   fi
 208   AC_SUBST(GPG_ERROR_CFLAGS)
 209   AC_SUBST(GPG_ERROR_LIBS)
 210   AC_SUBST(GPG_ERROR_MT_CFLAGS)
 211   AC_SUBST(GPG_ERROR_MT_LIBS)
 212 ])