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-rw-r--r--c/src/configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/c/src/configure.ac b/c/src/configure.ac
index 147d0f65d4..0e4a4fe3b2 100644
--- a/c/src/configure.ac
+++ b/c/src/configure.ac
@@ -100,7 +100,7 @@ RTEMS_CANONICALIZE_TOOLS
# Append warning flags if CFLAGS wasn't set.
AS_IF([test "$GCC" = yes && test "$rtems_cv_CFLAGS_set" != set],
-[CFLAGS="$CFLAGS -Wall -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs"])
+[CFLAGS="$CFLAGS -Wall -Wmissing-prototypes -Wimplicit-function-declaration -Wstrict-prototypes -Wnested-externs"])
AS_IF([test -n "${CFLAGS}"],[
ac_configure_args="$ac_configure_args 'CFLAGS=${CFLAGS}'"])