m4/pkg.m4

   1
   2 dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
   3 dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
   4 dnl also defines GSTUFF_PKG_ERRORS on error
   5 AC_DEFUN(PKG_CHECK_MODULES, [
   6   succeeded=no
   7
   8   if test -z "$PKG_CONFIG"; then
   9     AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
  10   fi
  11
  12   if test "$PKG_CONFIG" = "no" ; then
  13      echo "*** The pkg-config script could not be found. Make sure it is"
  14      echo "*** in your path, or set the PKG_CONFIG environment variable"
  15      echo "*** to the full path to pkg-config."
  16      echo "*** Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config."
  17   else
  18      PKG_CONFIG_MIN_VERSION=0.9.0
  19      if $PKG_CONFIG --atleast-pkgconfig-version $PKG_CONFIG_MIN_VERSION; then
  20         AC_MSG_CHECKING(for $2)
  21
  22         if $PKG_CONFIG --exists "$2" ; then
  23             AC_MSG_RESULT(yes)
  24             succeeded=yes
  25
  26             AC_MSG_CHECKING($1_CFLAGS)
  27             $1_CFLAGS=`$PKG_CONFIG --cflags "$2"`
  28             AC_MSG_RESULT($$1_CFLAGS)
  29
  30             AC_MSG_CHECKING($1_LIBS)
  31             $1_LIBS=`$PKG_CONFIG --libs "$2"`
  32             AC_MSG_RESULT($$1_LIBS)
  33         else
  34             $1_CFLAGS=""
  35             $1_LIBS=""
  36             ## If we have a custom action on failure, don't print errors, but
  37             ## do set a variable so people can do so.
  38             $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
  39             ifelse([$4], ,echo $$1_PKG_ERRORS,)
  40         fi
  41
  42         AC_SUBST($1_CFLAGS)
  43         AC_SUBST($1_LIBS)
  44      else
  45         echo "*** Your version of pkg-config is too old. You need version $PKG_CONFIG_MIN_VERSION or newer."
  46         echo "*** See http://www.freedesktop.org/software/pkgconfig"
  47      fi
  48   fi
  49
  50   if test $succeeded = yes; then
  51      ifelse([$3], , :, [$3])
  52   else
  53      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])
  54   fi
  55 ])
  56
  57