1 files changed, 123 insertions, 0 deletions
diff --git a/m4/ksba.m4 b/m4/ksba.m4
new file mode 100644
index 0000000..3e14e67
--- /dev/null
+++ b/m4/ksba.m4
@@ -0,0 +1,123 @@
+# ksba.m4 - autoconf macro to detect ksba
+#       Copyright (C) 2002 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.
+
+
+dnl AM_PATH_KSBA([MINIMUM-VERSION,
+dnl              [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])
+dnl Test for libksba and define KSBA_CFLAGS and KSBA_LIBS
+dnl MINIMUM-VERSION is a string with the version number optionalliy prefixed
+dnl with the API version to also check the API compatibility. Example:
+dnl a MINIMUM-VERSION of 1:1.0.7 won't pass the test unless the installed
+dnl version of libksba is at least 1.0.7 *and* the API number is 1.  Using
+dnl this feature prevents building against newer versions of libksba
+dnl with a changed API.
+dnl
+AC_DEFUN([AM_PATH_KSBA],
+[AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_ARG_WITH(ksba-prefix,
+            AC_HELP_STRING([--with-ksba-prefix=PFX],
+                           [prefix where KSBA is installed (optional)]),
+     ksba_config_prefix="$withval", ksba_config_prefix="")
+  if test x$ksba_config_prefix != x ; then
+     ksba_config_args="$ksba_config_args --prefix=$ksba_config_prefix"
+     if test x${KSBA_CONFIG+set} != xset ; then
+        KSBA_CONFIG=$ksba_config_prefix/bin/ksba-config
+     fi
+  fi
+
+  AC_PATH_PROG(KSBA_CONFIG, ksba-config, no)
+  tmp=ifelse([$1], ,1:1.0.0,$1)
+  if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then
+     req_ksba_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`
+     min_ksba_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`
+  else
+     req_ksba_api=0
+     min_ksba_version="$tmp"
+  fi
+
+  AC_MSG_CHECKING(for KSBA - version >= $min_ksba_version)
+  ok=no
+  if test "$KSBA_CONFIG" != "no" ; then
+    req_major=`echo $min_ksba_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`
+    req_minor=`echo $min_ksba_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`
+    req_micro=`echo $min_ksba_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`
+    ksba_config_version=`$KSBA_CONFIG $ksba_config_args --version`
+    major=`echo $ksba_config_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`
+    minor=`echo $ksba_config_version | \
+               sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`
+    micro=`echo $ksba_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 $ok = yes; then
+    AC_MSG_RESULT([yes ($ksba_config_version)])
+  else
+    AC_MSG_RESULT(no)
+  fi
+  if test $ok = yes; then
+     # Even if we have a recent libksba, we should check that the
+     # API is compatible.
+     if test "$req_ksba_api" -gt 0 ; then
+        tmp=`$KSBA_CONFIG --api-version 2>/dev/null || echo 0`
+        if test "$tmp" -gt 0 ; then
+           AC_MSG_CHECKING([KSBA API version])
+           if test "$req_ksba_api" -eq "$tmp" ; then
+             AC_MSG_RESULT(okay)
+           else
+             ok=no
+             AC_MSG_RESULT([does not match.  want=$req_ksba_api got=$tmp.])
+           fi
+        fi
+     fi
+  fi
+  if test $ok = yes; then
+    KSBA_CFLAGS=`$KSBA_CONFIG $ksba_config_args --cflags`
+    KSBA_LIBS=`$KSBA_CONFIG $ksba_config_args --libs`
+    ifelse([$2], , :, [$2])
+    libksba_config_host=`$LIBKSBA_CONFIG $ksba_config_args --host 2>/dev/null || echo none`
+    if test x"$libksba_config_host" != xnone ; then
+      if test x"$libksba_config_host" != x"$host" ; then
+  AC_MSG_WARN([[
+***
+*** The config script $LIBKSBA_CONFIG was
+*** built for $libksba_config_host and thus may not match the
+*** used host $host.
+*** You may want to use the configure option --with-libksba-prefix
+*** to specify a matching config script.
+***]])
+      fi
+    fi
+  else
+    KSBA_CFLAGS=""
+    KSBA_LIBS=""
+    ifelse([$3], , :, [$3])
+  fi
+  AC_SUBST(KSBA_CFLAGS)
+  AC_SUBST(KSBA_LIBS)
+])