--- configure.in
+++ configure.in
@@ -10,9 +10,9 @@
 dnl Checks for programs.
 AC_PROG_CC
 AC_PROG_RANLIB
+AM_PROG_CC_C_O
 
 dnl various CFLAGS
-CFLAGS="-g"
 CFLAGS="$CFLAGS -Wall"
 
 dnl Checks for libraries.
@@ -35,6 +35,7 @@
 dnl L10n support
 ALL_LINGUAS="en de"
 
+AC_GNU_SOURCE
 AM_GNU_GETTEXT
 
 XGETTEXTFLAGS=