Chris@4: 
Chris@4: dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
Chris@4: dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
Chris@4: dnl also defines GSTUFF_PKG_ERRORS on error
Chris@4: AC_DEFUN(PKG_CHECK_MODULES, [
Chris@4:   succeeded=no
Chris@4: 
Chris@4:   if test -z "$PKG_CONFIG"; then
Chris@4:     AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
Chris@4:   fi
Chris@4: 
Chris@4:   if test "$PKG_CONFIG" = "no" ; then
Chris@4:      echo "*** The pkg-config script could not be found. Make sure it is"
Chris@4:      echo "*** in your path, or set the PKG_CONFIG environment variable"
Chris@4:      echo "*** to the full path to pkg-config."
Chris@4:      echo "*** Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config."
Chris@4:   else
Chris@4:      PKG_CONFIG_MIN_VERSION=0.9.0
Chris@4:      if $PKG_CONFIG --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
Chris@4:         AC_MSG_CHECKING(for $2)
Chris@4: 
Chris@4:         if $PKG_CONFIG --exists "$2" ; then
Chris@4:             AC_MSG_RESULT(yes)
Chris@4:             succeeded=yes
Chris@4: 
Chris@4:             AC_MSG_CHECKING($1_CFLAGS)
Chris@4:             $1_CFLAGS=`$PKG_CONFIG --cflags "$2"`
Chris@4:             AC_MSG_RESULT($$1_CFLAGS)
Chris@4: 
Chris@4:             AC_MSG_CHECKING($1_LIBS)
Chris@4:             $1_LIBS=`$PKG_CONFIG --libs "$2"`
Chris@4:             AC_MSG_RESULT($$1_LIBS)
Chris@4:         else
Chris@4:             $1_CFLAGS=""
Chris@4:             $1_LIBS=""
Chris@4:             ## If we have a custom action on failure, don't print errors, but 
Chris@4:             ## do set a variable so people can do so.
Chris@4:             $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
Chris@4:             ifelse([$4], ,echo $$1_PKG_ERRORS,)
Chris@4:         fi
Chris@4: 
Chris@4:         AC_SUBST($1_CFLAGS)
Chris@4:         AC_SUBST($1_LIBS)
Chris@4:      else
Chris@4:         echo "*** Your version of pkg-config is too old. You need version $PKG_CONFIG_MIN_VERSION or newer."
Chris@4:         echo "*** See http://www.freedesktop.org/software/pkgconfig"
Chris@4:      fi
Chris@4:   fi
Chris@4: 
Chris@4:   if test $succeeded = yes; then
Chris@4:      ifelse([$3], , :, [$3])
Chris@4:   else
Chris@4:      ifelse([$4], , AC_MSG_ERROR([Library requirements ($2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.]), [$4])
Chris@4:   fi
Chris@4: ])
Chris@4: 
Chris@4: