1dnl Autoconf macros for libgpgme
2dnl $Id$
3
4# Configure paths for GPGME
5# Shamelessly stolen from the one of XDELTA by Owen Taylor
6# Werner Koch  2000-11-17
7
8dnl AM_PATH_GPGME([MINIMUM-VERSION,
9dnl               [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
10dnl Test for gpgme, and define GPGME_CFLAGS and GPGME_LIBS
11dnl
12AC_DEFUN([AM_PATH_GPGME],
13[dnl
14dnl Get the cflags and libraries from the gpgme-config script
15dnl
16  AC_ARG_WITH(gpgme-prefix,
17   [  --with-gpgme-prefix=PFX   Prefix where gpgme is installed (optional)],
18          gpgme_config_prefix="$withval", gpgme_config_prefix="")
19  AC_ARG_ENABLE(gpgmetest,
20   [  --disable-gpgmetest    Do not try to compile and run a test gpgme program],
21          , enable_gpgmetest=yes)
22
23  if test x$gpgme_config_prefix != x ; then
24     gpgme_config_args="$gpgme_config_args --prefix=$gpgme_config_prefix"
25     if test x${GPGME_CONFIG+set} != xset ; then
26        GPGME_CONFIG=$gpgme_config_prefix/bin/gpgme-config
27     fi
28  fi
29
30  AC_PATH_PROG(GPGME_CONFIG, gpgme-config, no)
31  min_gpgme_version=ifelse([$1], ,1.0.0,$1)
32  AC_MSG_CHECKING(for GPGME - version >= $min_gpgme_version)
33  no_gpgme=""
34  if test "$GPGME_CONFIG" = "no" ; then
35    no_gpgme=yes
36  else
37    GPGME_CFLAGS=`$GPGME_CONFIG $gpgme_config_args --cflags`
38    GPGME_LIBS=`$GPGME_CONFIG $gpgme_config_args --libs`
39    gpgme_config_version=`$GPGME_CONFIG $gpgme_config_args --version`
40    if test "x$enable_gpgmetest" = "xyes" ; then
41      ac_save_CFLAGS="$CFLAGS"
42      ac_save_LIBS="$LIBS"
43      CFLAGS="$CFLAGS $GPGME_CFLAGS"
44      LIBS="$LIBS $GPGME_LIBS"
45dnl
46dnl Now check if the installed gpgme is sufficiently new. Also sanity
47dnl checks the results of gpgme-config to some extent
48dnl
49      rm -f conf.gpgmetest
50      AC_TRY_RUN([
51#include <stdio.h>
52#include <stdlib.h>
53#include <string.h>
54#include <gpgme.h>
55
56int
57main ()
58{
59 system ("touch conf.gpgmetest");
60
61 if( strcmp( gpgme_check_version(NULL), "$gpgme_config_version" ) )
62 {
63   printf("\n"
64"*** 'gpgme-config --version' returned %s, but GPGME (%s) was found!\n",
65              "$gpgme_config_version", gpgme_check_version(NULL) );
66   printf(
67"*** If gpgme-config was correct, then it is best to remove the old\n"
68"*** version of GPGME.  You may also be able to fix the error\n"
69"*** by modifying your LD_LIBRARY_PATH enviroment variable, or by editing\n"
70"*** /etc/ld.so.conf.  Make sure you have run ldconfig if that is\n"
71"*** required on your system.\n"
72"*** If gpgme-config was wrong, set the environment variable GPGME_CONFIG\n"
73"*** to point to the correct copy of gpgme-config, \n"
74"*** and remove the file config.cache before re-running configure\n"
75        );
76 }
77 else if ( strcmp(gpgme_check_version(NULL), GPGME_VERSION ) )
78 {
79   printf("\n*** GPGME header file (version %s) does not match\n",
80            GPGME_VERSION);
81   printf("*** library (version %s)\n", gpgme_check_version(NULL) );
82 }
83 else
84 {
85        if ( gpgme_check_version( "$min_gpgme_version" ) )
86             return 0;
87  printf("no\n"
88"*** An old version of GPGME (%s) was found.\n", gpgme_check_version(NULL) );
89  printf(
90"*** You need a version of GPGME newer than %s.\n", "$min_gpgme_version" );
91  printf(
92"*** The latest version of GPGME is always available at\n"
93"***      ftp://ftp.gnupg.org/pub/gcrypt/alpha/gpgme/\n"
94"*** \n"
95"*** If you have already installed a sufficiently new version, this error\n"
96"*** probably means that the wrong copy of the gpgme-config shell script is\n"
97"*** being found. The easiest way to fix this is to remove the old version\n"
98"*** of GPGME, but you can also set the GPGME_CONFIG environment to point to\n"
99"*** the correct copy of gpgme-config. (In this case, you will have to\n"
100"*** modify your LD_LIBRARY_PATH enviroment variable, or edit /etc/ld.so.conf\n"
101"*** so that the correct libraries are found at run-time).\n"
102      );
103    }
104  return 1;
105}
106],, no_gpgme=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
107       CFLAGS="$ac_save_CFLAGS"
108       LIBS="$ac_save_LIBS"
109     fi
110  fi
111  if test "x$no_gpgme" = x ; then
112     AC_MSG_RESULT(yes)
113     ifelse([$2], , :, [$2])
114  else
115     if test -f conf.gpgmetest ; then
116        :
117     else
118        AC_MSG_RESULT(no)
119     fi
120     if test "$GPGME_CONFIG" = "no" ; then
121       echo "*** The gpgme-config script installed by GPGME could not be found"
122       echo "*** If GPGME was installed in PREFIX, make sure PREFIX/bin is in"
123       echo "*** your path, or set the GPGME_CONFIG environment variable to the"
124       echo "*** full path to gpgme-config."
125     else
126       if test -f conf.gpgmetest ; then
127        :
128       else
129          echo "*** Could not run gpgme test program, checking why..."
130          CFLAGS="$CFLAGS $GPGME_CFLAGS"
131          LIBS="$LIBS $GPGME_LIBS"
132          AC_TRY_LINK([
133#include <stdio.h>
134#include <stdlib.h>
135#include <string.h>
136#include <gpgme.h>
137],      [ gpgme_check_version(NULL); return 0 ],
138        [
139echo "*** The test program compiled, but did not run. This usually means"
140echo "*** that the run-time linker is not finding GPGME or finding the wrong"
141echo "*** version of GPGME. If it is not finding GPGME, you'll need to set your"
142echo "*** LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf to point"
143echo "*** to the installed location  Also, make sure you have run ldconfig if"
144echo "*** that is required on your system"
145echo "***"
146echo "*** If you have an old version installed, it is best to remove it,"
147echo "*** although you may also be able to get things to work by"
148echo "*** modifying LD_LIBRARY_PATH"
149echo "***"
150        ],
151        [
152echo "*** The test program failed to compile or link. See the file config.log"
153echo "*** for the exact error that occured. This usually means GPGME was"
154echo "*** incorrectly installed or that you have moved GPGME since it was"
155echo "*** installed. In the latter case, you may want to edit the"
156echo "*** gpgme-config script: $GPGME_CONFIG"
157        ])
158          CFLAGS="$ac_save_CFLAGS"
159          LIBS="$ac_save_LIBS"
160       fi
161     fi
162     GPGME_CFLAGS=""
163     GPGME_LIBS=""
164     ifelse([$3], , :, [$3])
165  fi
166  AC_SUBST(GPGME_CFLAGS)
167  AC_SUBST(GPGME_LIBS)
168  rm -f conf.gpgmetest
169])
170
171