--- FreecivCVS/configure.in	Fri Apr  7 11:29:44 2000
+++ freeciv/configure.in	Tue May  9 08:45:14 2000
@@ -448,6 +448,22 @@
      fi
    fi])
 
+dnl Vast quantities of meaningless errors from xgettext is also annoying.
+dnl We fix this by filtering its output, removing "unknown extension"
+dnl warnings.
+AC_OUTPUT_COMMANDS(
+  [if test -f po/Makefile ; then
+     if grep 'grep -v "is unknown; will try C"' po/Makefile >/dev/null 2>&1 ; then
+       # has already been extended
+       :
+     else
+       echo silencing po/Makefile
+       mv -f po/Makefile po/Makefile.tmp
+       sed -e 's/--files-from=$(srcdir)\/POTFILES.in/--files-from=$(srcdir)\/POTFILES.in 2>\&1 | grep -v "is unknown; will try C"/g' po/Makefile.tmp > po/Makefile
+       rm po/Makefile.tmp
+     fi
+   fi])
+
 dnl The BeOS sys/uio.h is broken.  This kluges it out of existence.
 dnl (This still causes lots of spurious changes to config.h on BeOS.)
 AC_OUTPUT_COMMANDS(