diff --git a/configure.ac b/configure.ac
index bdafd0ef6..370c30d78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,7 @@ AC_PROG_CC
 AC_PROG_CXX
 AC_C_INLINE
 if test "x$GCC" = "xyes" ; then
-    CFLAGS="-Wall -Wformat-security -W -Wmissing-prototypes -Wdeclaration-after-statement -std=gnu99"
+    CFLAGS="-std=gnu99 -ggdb3 -Wall -Wextra -Wredundant-decls -Wpointer-arith -Wformat-security -W -Wmissing-declarations -Wdeclaration-after-statement -Wcast-align -Winline -Winit-self -Wundef -Wnested-externs -Wmissing-format-attribute"
     CXXFLAGS="-Wall -Wformat-security -W"
 fi