duplicate of m4 in common/m4

Original commit message from CVS:
duplicate of m4 in common/m4

m4/pkg.m4

@@ -1,56 +0,0 @@
-
-dnl PKG_CHECK_MODULES(GSTUFF, gtk+-2.0 >= 1.3 glib = 1.3.4, action-if, action-not)
-dnl defines GSTUFF_LIBS, GSTUFF_CFLAGS, see pkg-config man page
-dnl also defines GSTUFF_PKG_ERRORS on error
-AC_DEFUN(PKG_CHECK_MODULES, [
-  succeeded=no
-
-  if test -z "$PKG_CONFIG"; then
-    AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
-  fi
-
-  if test "$PKG_CONFIG" = "no" ; then
-     echo "*** The pkg-config script could not be found. Make sure it is"
-     echo "*** in your path, or set the PKG_CONFIG environment variable"
-     echo "*** to the full path to pkg-config."
-     echo "*** Or see http://www.freedesktop.org/software/pkgconfig to get pkg-config."
-  else
-     if ! $PKG_CONFIG --atleast-pkgconfig-version 0.7.0; then
-        echo "*** Your version of pkg-config is too old. You need version 0.7.0 or newer."
-        echo "*** See http://www.freedesktop.org/software/pkgconfig"
-     else
-        AC_MSG_CHECKING(for $2)
-
-        if $PKG_CONFIG --exists "$2" ; then
-            AC_MSG_RESULT(yes)
-            succeeded=yes
-
-            AC_MSG_CHECKING($1_CFLAGS)
-            $1_CFLAGS=`$PKG_CONFIG --cflags "$2"`
-            AC_MSG_RESULT($$1_CFLAGS)
-
-            AC_MSG_CHECKING($1_LIBS)
-            $1_LIBS=`$PKG_CONFIG --libs "$2"`
-            AC_MSG_RESULT($$1_LIBS)
-        else
-            $1_CFLAGS=""
-            $1_LIBS=""
-            ## If we have a custom action on failure, don't print errors, but 
-            ## do set a variable so people can do so.
-            $1_PKG_ERRORS=`$PKG_CONFIG --errors-to-stdout --print-errors "$2"`
-            ifelse([$4], ,echo $$1_PKG_ERRORS,)
-        fi
-
-        AC_SUBST($1_CFLAGS)
-        AC_SUBST($1_LIBS)
-     fi
-  fi
-
-  if test $succeeded = yes; then
-     ifelse([$3], , :, [$3])
-  else
-     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])
-  fi
-])
-
-