1 dnl Autoconf macros for libgcrypt

     2 dnl       Copyright (C) 2002, 2004 Free Software Foundation, Inc.

     3 dnl

     4 dnl This file is free software; as a special exception the author gives

     5 dnl unlimited permission to copy and/or distribute it, with or without

     6 dnl modifications, as long as this notice is preserved.

     7 dnl

     8 dnl This file is distributed in the hope that it will be useful, but

     9 dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the

    10 dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

    11 

    12 

    13 dnl AM_PATH_LIBGCRYPT([MINIMUM-VERSION,

    14 dnl                   [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]]])

    15 dnl Test for libgcrypt and define LIBGCRYPT_CFLAGS and LIBGCRYPT_LIBS.

    16 dnl MINIMUN-VERSION is a string with the version number optionalliy prefixed

    17 dnl with the API version to also check the API compatibility. Example:

    18 dnl a MINIMUN-VERSION of 1:1.2.5 won't pass the test unless the installed

    19 dnl version of libgcrypt is at least 1.2.5 *and* the API number is 1.  Using

    20 dnl this features allows to prevent build against newer versions of libgcrypt

    21 dnl with a changed API.

    22 dnl

    23 AC_DEFUN([AM_PATH_LIBGCRYPT],

    24 [ AC_ARG_WITH(libgcrypt-prefix,

    25             AC_HELP_STRING([--with-libgcrypt-prefix=PFX],

    26                            [prefix where LIBGCRYPT is installed (optional)]),

    27      libgcrypt_config_prefix="$withval", libgcrypt_config_prefix="")

    28   if test x$libgcrypt_config_prefix != x ; then

    29      if test x${LIBGCRYPT_CONFIG+set} != xset ; then

    30         LIBGCRYPT_CONFIG=$libgcrypt_config_prefix/bin/libgcrypt-config

    31      fi

    32   fi

    33 

    34   AC_PATH_TOOL(LIBGCRYPT_CONFIG, libgcrypt-config, no)

    35   tmp=ifelse([$1], ,1:1.2.0,$1)

    36   if echo "$tmp" | grep ':' >/dev/null 2>/dev/null ; then

    37      req_libgcrypt_api=`echo "$tmp"     | sed 's/\(.*\):\(.*\)/\1/'`

    38      min_libgcrypt_version=`echo "$tmp" | sed 's/\(.*\):\(.*\)/\2/'`

    39   else

    40      req_libgcrypt_api=0

    41      min_libgcrypt_version="$tmp"

    42   fi

    43 

    44   AC_MSG_CHECKING(for LIBGCRYPT - version >= $min_libgcrypt_version)

    45   ok=no

    46   if test "$LIBGCRYPT_CONFIG" != "no" ; then

    47     req_major=`echo $min_libgcrypt_version | \

    48                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\1/'`

    49     req_minor=`echo $min_libgcrypt_version | \

    50                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\2/'`

    51     req_micro=`echo $min_libgcrypt_version | \

    52                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\)/\3/'`

    53     libgcrypt_config_version=`$LIBGCRYPT_CONFIG --version`

    54     major=`echo $libgcrypt_config_version | \

    55                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\1/'`

    56     minor=`echo $libgcrypt_config_version | \

    57                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\2/'`

    58     micro=`echo $libgcrypt_config_version | \

    59                sed 's/\([[0-9]]*\)\.\([[0-9]]*\)\.\([[0-9]]*\).*/\3/'`

    60     if test "$major" -gt "$req_major"; then

    61         ok=yes

    62     else

    63         if test "$major" -eq "$req_major"; then

    64             if test "$minor" -gt "$req_minor"; then

    65                ok=yes

    66             else

    67                if test "$minor" -eq "$req_minor"; then

    68                    if test "$micro" -ge "$req_micro"; then

    69                      ok=yes

    70                    fi

    71                fi

    72             fi

    73         fi

    74     fi

    75   fi

    76   if test $ok = yes; then

    77     AC_MSG_RESULT([yes ($libgcrypt_config_version)])

    78   else

    79     AC_MSG_RESULT(no)

    80   fi

    81   if test $ok = yes; then

    82      # If we have a recent libgcrypt, we should also check that the

    83      # API is compatible

    84      if test "$req_libgcrypt_api" -gt 0 ; then

    85         tmp=`$LIBGCRYPT_CONFIG --api-version 2>/dev/null || echo 0`

    86         if test "$tmp" -gt 0 ; then

    87            AC_MSG_CHECKING([LIBGCRYPT API version])

    88            if test "$req_libgcrypt_api" -eq "$tmp" ; then

    89              AC_MSG_RESULT([okay])

    90            else

    91              ok=no

    92              AC_MSG_RESULT([does not match. want=$req_libgcrypt_api got=$tmp])

    93            fi

    94         fi

    95      fi

    96   fi

    97   if test $ok = yes; then

    98     LIBGCRYPT_CFLAGS=`$LIBGCRYPT_CONFIG --cflags`

    99     LIBGCRYPT_LIBS=`$LIBGCRYPT_CONFIG --libs`

   100     ifelse([$2], , :, [$2])

   101     if test x"$host" != x ; then

   102       libgcrypt_config_host=`$LIBGCRYPT_CONFIG --host 2>/dev/null || echo none`

   103       if test x"$libgcrypt_config_host" != xnone ; then

   104         if test x"$libgcrypt_config_host" != x"$host" ; then

   105   AC_MSG_WARN([[

   106 ***

   107 *** The config script $LIBGCRYPT_CONFIG was

   108 *** built for $libgcrypt_config_host and thus may not match the

   109 *** used host $host.

   110 *** You may want to use the configure option --with-libgcrypt-prefix

   111 *** to specify a matching config script.

   112 ***]])

   113         fi

   114       fi

   115     fi

   116   else

   117     LIBGCRYPT_CFLAGS=""

   118     LIBGCRYPT_LIBS=""

   119     ifelse([$3], , :, [$3])

   120   fi

   121   AC_SUBST(LIBGCRYPT_CFLAGS)

   122   AC_SUBST(LIBGCRYPT_LIBS)

   123 ])