m4/gpg-error.m4

   1 # gpg-error.m4 - autoconf macro to detect libgpg-error.
   2 # Copyright (C) 2002, 2003, 2004, 2011, 2014, 2018, 2020 g10 Code GmbH
   3 #
   4 # This file is free software; as a special exception the author gives
   5 # unlimited permission to copy and/or distribute it, with or without
   6 # modifications, as long as this notice is preserved.
   7 #
   8 # This file is distributed in the hope that it will be useful, but
   9 # WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
  10 # implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11 #
  12 # Last-changed: 2020-11-17
  13
  14
  15 dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
  16 dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
  17 dnl
  18 dnl Test for libgpg-error and define GPG_ERROR_CFLAGS, GPG_ERROR_LIBS,
  19 dnl GPG_ERROR_MT_CFLAGS, and GPG_ERROR_MT_LIBS.  The _MT_ variants are
  20 dnl used for programs requireing real multi thread support.
  21 dnl
  22 dnl If a prefix option is not used, the config script is first
  23 dnl searched in $SYSROOT/bin and then along $PATH.  If the used
  24 dnl config script does not match the host specification the script
  25 dnl is added to the gpg_config_script_warn variable.
  26 dnl
  27 AC_DEFUN([AM_PATH_GPG_ERROR],
  28 [ AC_REQUIRE([AC_CANONICAL_HOST])
  29   gpg_error_config_prefix=""
  30   dnl --with-libgpg-error-prefix=PFX is the preferred name for this option,
  31   dnl since that is consistent with how our three siblings use the directory/
  32   dnl package name in --with-$dir_name-prefix=PFX.
  33   AC_ARG_WITH(libgpg-error-prefix,
  34               AS_HELP_STRING([--with-libgpg-error-prefix=PFX],
  35                              [prefix where GPG Error is installed (optional)]),
  36               [gpg_error_config_prefix="$withval"])
  37
  38   dnl Accept --with-gpg-error-prefix and make it work the same as
  39   dnl --with-libgpg-error-prefix above, for backwards compatibility,
  40   dnl but do not document this old, inconsistently-named option.
  41   AC_ARG_WITH(gpg-error-prefix,,
  42               [gpg_error_config_prefix="$withval"])
  43
  44   if test x"${GPG_ERROR_CONFIG}" = x ; then
  45      if test x"${gpg_error_config_prefix}" != x ; then
  46         GPG_ERROR_CONFIG="${gpg_error_config_prefix}/bin/gpg-error-config"
  47      else
  48        case "${SYSROOT}" in
  49          /*)
  50            if test -x "${SYSROOT}/bin/gpg-error-config" ; then
  51              GPG_ERROR_CONFIG="${SYSROOT}/bin/gpg-error-config"
  52            fi
  53            ;;
  54          '')
  55            ;;
  56           *)
  57            AC_MSG_WARN([Ignoring \$SYSROOT as it is not an absolute path.])
  58            ;;
  59        esac
  60      fi
  61   fi
  62
  63   AC_PATH_PROG(GPG_ERROR_CONFIG, gpg-error-config, no)
  64   min_gpg_error_version=ifelse([$1], ,1.33,$1)
  65   ok=no
  66
  67   if test "$prefix" = NONE ; then
  68     prefix_option_expanded=/usr/local
  69   else
  70     prefix_option_expanded="$prefix"
  71   fi
  72   if test "$exec_prefix" = NONE ; then
  73     exec_prefix_option_expanded=$prefix_option_expanded
  74   else
  75     exec_prefix_option_expanded=$(prefix=$prefix_option_expanded eval echo $exec_prefix)
  76   fi
  77   libdir_option_expanded=$(prefix=$prefix_option_expanded exec_prefix=$exec_prefix_option_expanded eval echo $libdir)
  78
  79   if test -f $libdir_option_expanded/pkgconfig/gpg-error.pc; then
  80     gpgrt_libdir=$libdir_option_expanded
  81   else
  82     if crt1_path=$(${CC:-cc} -print-file-name=crt1.o 2>/dev/null); then
  83       if possible_libdir=$(cd ${crt1_path%/*} && pwd 2>/dev/null); then
  84         if test -f $possible_libdir/pkgconfig/gpg-error.pc; then
  85           gpgrt_libdir=$possible_libdir
  86         fi
  87       fi
  88     fi
  89   fi
  90
  91   if test "$GPG_ERROR_CONFIG" = "no" -a -n "$gpgrt_libdir"; then
  92     AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no)
  93     if test "$GPGRT_CONFIG" = "no"; then
  94       unset GPGRT_CONFIG
  95     else
  96       GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir"
  97       if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then
  98         GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error"
  99         AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config])
 100         gpg_error_config_version=`$GPG_ERROR_CONFIG --modversion`
 101       else
 102         unset GPGRT_CONFIG
 103       fi
 104     fi
 105   else
 106     gpg_error_config_version=`$GPG_ERROR_CONFIG --version`
 107   fi
 108   if test "$GPG_ERROR_CONFIG" != "no"; then
 109     req_major=`echo $min_gpg_error_version | \
 110                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
 111     req_minor=`echo $min_gpg_error_version | \
 112                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
 113     major=`echo $gpg_error_config_version | \
 114                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
 115     minor=`echo $gpg_error_config_version | \
 116                sed 's/\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
 117     if test "$major" -gt "$req_major"; then
 118         ok=yes
 119     else
 120         if test "$major" -eq "$req_major"; then
 121             if test "$minor" -ge "$req_minor"; then
 122                ok=yes
 123             fi
 124         fi
 125     fi
 126     if test -z "$GPGRT_CONFIG" -a -n "$gpgrt_libdir"; then
 127       if test "$major" -gt 1 -o "$major" -eq 1 -a "$minor" -ge 33; then
 128         AC_PATH_PROG(GPGRT_CONFIG, gpgrt-config, no)
 129         if test "$GPGRT_CONFIG" = "no"; then
 130           unset GPGRT_CONFIG
 131         else
 132           GPGRT_CONFIG="$GPGRT_CONFIG --libdir=$gpgrt_libdir"
 133           if $GPGRT_CONFIG gpg-error >/dev/null 2>&1; then
 134             GPG_ERROR_CONFIG="$GPGRT_CONFIG gpg-error"
 135             AC_MSG_NOTICE([Use gpgrt-config with $gpgrt_libdir as gpg-error-config])
 136           else
 137             unset GPGRT_CONFIG
 138           fi
 139         fi
 140       fi
 141     fi
 142   fi
 143   AC_MSG_CHECKING(for GPG Error - version >= $min_gpg_error_version)
 144   if test $ok = yes; then
 145     GPG_ERROR_CFLAGS=`$GPG_ERROR_CONFIG --cflags`
 146     GPG_ERROR_LIBS=`$GPG_ERROR_CONFIG --libs`
 147     if test -z "$GPGRT_CONFIG"; then
 148       GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --mt --cflags 2>/dev/null`
 149       GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --mt --libs 2>/dev/null`
 150     else
 151       GPG_ERROR_MT_CFLAGS=`$GPG_ERROR_CONFIG --variable=mtcflags 2>/dev/null`
 152       GPG_ERROR_MT_CFLAGS="$GPG_ERROR_CFLAGS${GPG_ERROR_CFLAGS:+ }$GPG_ERROR_MT_CFLAGS"
 153       GPG_ERROR_MT_LIBS=`$GPG_ERROR_CONFIG --variable=mtlibs 2>/dev/null`
 154       GPG_ERROR_MT_LIBS="$GPG_ERROR_LIBS${GPG_ERROR_LIBS:+ }$GPG_ERROR_MT_LIBS"
 155     fi
 156     AC_MSG_RESULT([yes ($gpg_error_config_version)])
 157     ifelse([$2], , :, [$2])
 158     if test -z "$GPGRT_CONFIG"; then
 159       gpg_error_config_host=`$GPG_ERROR_CONFIG --host 2>/dev/null || echo none`
 160     else
 161       gpg_error_config_host=`$GPG_ERROR_CONFIG --variable=host 2>/dev/null || echo none`
 162     fi
 163     if test x"$gpg_error_config_host" != xnone ; then
 164       if test x"$gpg_error_config_host" != x"$host" ; then
 165   AC_MSG_WARN([[
 166 ***
 167 *** The config script "$GPG_ERROR_CONFIG" was
 168 *** built for $gpg_error_config_host and thus may not match the
 169 *** used host $host.
 170 *** You may want to use the configure option --with-libgpg-error-prefix
 171 *** to specify a matching config script or use \$SYSROOT.
 172 ***]])
 173         gpg_config_script_warn="$gpg_config_script_warn libgpg-error"
 174       fi
 175     fi
 176   else
 177     GPG_ERROR_CFLAGS=""
 178     GPG_ERROR_LIBS=""
 179     GPG_ERROR_MT_CFLAGS=""
 180     GPG_ERROR_MT_LIBS=""
 181     AC_MSG_RESULT(no)
 182     ifelse([$3], , :, [$3])
 183   fi
 184   AC_SUBST(GPG_ERROR_CFLAGS)
 185   AC_SUBST(GPG_ERROR_LIBS)
 186   AC_SUBST(GPG_ERROR_MT_CFLAGS)
 187   AC_SUBST(GPG_ERROR_MT_LIBS)
 188 ])