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
15dnl AM_PATH_GPG_ERROR([MINIMUM-VERSION,
16dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
17dnl
18dnl Test for libgpg-error and define GPG_ERROR_CFLAGS, GPG_ERROR_LIBS,
19dnl GPG_ERROR_MT_CFLAGS, and GPG_ERROR_MT_LIBS.  The _MT_ variants are
20dnl used for programs requireing real multi thread support.
21dnl
22dnl If a prefix option is not used, the config script is first
23dnl searched in $SYSROOT/bin and then along $PATH.  If the used
24dnl config script does not match the host specification the script
25dnl is added to the gpg_config_script_warn variable.
26dnl
27AC_DEFUN([AM_PATH_GPG_ERROR],
28[ AC_REQUIRE([AC_CANONICAL_HOST])
29  gpg_error_config_prefix=""
30  dnl --with-libgpg-error-prefix=PFX is the preferred name for this option,
31  dnl since that is consistent with how our three siblings use the directory/
32  dnl package name in --with-$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])
189