Macro: ac_path_generic

Back to the Main Page. | Download the M4 Source.

# ac_path_generic

## Synopsis

`AC_PATH_GENERIC(LIBRARY [, MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])`

## Version

1.1.1.1 (2001/07/26) Miscellaneous @ ac-archive-0.5.32

## Author

Angus Lees <gusl@cse.unsw.edu.au>

## Description

Runs a LIBRARY-config script and defines LIBRARY_CFLAGS and LIBRARY_LIBS

The script must support `--cflags' and `--libs' args. If MINIMUM-VERSION is specified, the script must also support the `--version' arg. If the `--with-library-[exec-]prefix' arguments to ./configure are given, it must also support `--prefix' and `--exec-prefix'. (In other words, it must be like gtk-config.)

For example:

`AC_PATH_GENERIC(Foo, 1.0.0)`

would run `foo-config --version' and check that it is at least 1.0.0

If so, the following would then be defined:

`FOO_CFLAGS to `foo-config --cflags``
`FOO_LIBS to `foo-config --libs``

At present there is no support for additional "MODULES" (see AM_PATH_GTK) (shamelessly stolen from gtk.m4 and then hacked around a fair amount)

## M4 Source Code

    AC_DEFUN([AC_PATH_GENERIC],
    [dnl
    dnl we're going to need uppercase, lowercase and user-friendly versions of the
    dnl string `LIBRARY'
    pushdef([UP], translit([$1], [a-z], [A-Z]))dnl
    pushdef([DOWN], translit([$1], [A-Z], [a-z]))dnl

    dnl
    dnl Get the cflags and libraries from the LIBRARY-config script
    dnl
    AC_ARG_WITH(DOWN-prefix,[  --with-]DOWN[-prefix=PFX       Prefix where $1 is installed (optional)],
            DOWN[]_config_prefix="$withval", DOWN[]_config_prefix="")
    AC_ARG_WITH(DOWN-exec-prefix,[  --with-]DOWN[-exec-prefix=PFX Exec prefix where $1 is installed (optional)],
            DOWN[]_config_exec_prefix="$withval", DOWN[]_config_exec_prefix="")

      if test x$DOWN[]_config_exec_prefix != x ; then
         DOWN[]_config_args="$DOWN[]_config_args --exec-prefix=$DOWN[]_config_exec_prefix"
         if test x${UP[]_CONFIG+set} != xset ; then
           UP[]_CONFIG=$DOWN[]_config_exec_prefix/bin/DOWN-config
         fi
      fi
      if test x$DOWN[]_config_prefix != x ; then
         DOWN[]_config_args="$DOWN[]_config_args --prefix=$DOWN[]_config_prefix"
         if test x${UP[]_CONFIG+set} != xset ; then
           UP[]_CONFIG=$DOWN[]_config_prefix/bin/DOWN-config
         fi
      fi

      AC_PATH_PROG(UP[]_CONFIG, DOWN-config, no)
      ifelse([$2], ,
         AC_MSG_CHECKING(for $1),
         AC_MSG_CHECKING(for $1 - version >= $2)
      )
      no_[]DOWN=""
      if test "$UP[]_CONFIG" = "no" ; then
         no_[]DOWN=yes
      else
         UP[]_CFLAGS="`$UP[]_CONFIG $DOWN[]_config_args --cflags`"
         UP[]_LIBS="`$UP[]_CONFIG $DOWN[]_config_args --libs`"
         ifelse([$2], , ,[
            DOWN[]_config_major_version=`$UP[]_CONFIG $DOWN[]_config_args \
             --version | sed 's/[[^0-9]]*\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
            DOWN[]_config_minor_version=`$UP[]_CONFIG $DOWN[]_config_args \
             --version | sed 's/[[^0-9]]*\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
            DOWN[]_config_micro_version=`$UP[]_CONFIG $DOWN[]_config_args \
             --version | sed 's/[[^0-9]]*\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
            DOWN[]_wanted_major_version="regexp($2, [\<\([0-9]*\)], [\1])"
            DOWN[]_wanted_minor_version="regexp($2, [\<\([0-9]*\)\.\([0-9]*\)], [\2])"
            DOWN[]_wanted_micro_version="regexp($2, [\<\([0-9]*\).\([0-9]*\).\([0-9]*\)], [\3])"

            # Compare wanted version to what config script returned.
            # If I knew what library was being run, i'd probably also compile
            # a test program at this point (which also extracted and tested
            # the version in some library-specific way)
            if test "$DOWN[]_config_major_version" -lt \
                            "$DOWN[]_wanted_major_version" \
              -o \( "$DOWN[]_config_major_version" -eq \
                            "$DOWN[]_wanted_major_version" \
                -a "$DOWN[]_config_minor_version" -lt \
                            "$DOWN[]_wanted_minor_version" \) \
              -o \( "$DOWN[]_config_major_version" -eq \
                            "$DOWN[]_wanted_major_version" \
                -a "$DOWN[]_config_minor_version" -eq \
                            "$DOWN[]_wanted_minor_version" \
                -a "$DOWN[]_config_micro_version" -lt \
                            "$DOWN[]_wanted_micro_version" \) ; then
              # older version found
              no_[]DOWN=yes
              echo -n "*** An old version of $1 "
              echo -n "($DOWN[]_config_major_version"
              echo -n ".$DOWN[]_config_minor_version"
              echo    ".$DOWN[]_config_micro_version) was found."
              echo -n "*** You need a version of $1 newer than "
              echo -n "$DOWN[]_wanted_major_version"
              echo -n ".$DOWN[]_wanted_minor_version"
              echo    ".$DOWN[]_wanted_micro_version."
              echo "***"
              echo "*** If you have already installed a sufficiently new version, this error"
              echo "*** probably means that the wrong copy of the DOWN-config shell script is"
              echo "*** being found. The easiest way to fix this is to remove the old version"
              echo "*** of $1, but you can also set the UP[]_CONFIG environment to point to the"
              echo "*** correct copy of DOWN-config. (In this case, you will have to"
              echo "*** modify your LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf"
              echo "*** so that the correct libraries are found at run-time)"
            fi
         ])
      fi
      if test "x$no_[]DOWN" = x ; then
         AC_MSG_RESULT(yes)
         ifelse([$3], , :, [$3])
      else
         AC_MSG_RESULT(no)
         if test "$UP[]_CONFIG" = "no" ; then
           echo "*** The DOWN-config script installed by $1 could not be found"
           echo "*** If $1 was installed in PREFIX, make sure PREFIX/bin is in"
           echo "*** your path, or set the UP[]_CONFIG environment variable to the"
           echo "*** full path to DOWN-config."
         fi
         UP[]_CFLAGS=""
         UP[]_LIBS=""
         ifelse([$4], , :, [$4])
      fi
      AC_SUBST(UP[]_CFLAGS)
      AC_SUBST(UP[]_LIBS)

      popdef([UP])
      popdef([DOWN])
    ])