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-rw-r--r--erts/configure.in11
1 files changed, 10 insertions, 1 deletions
diff --git a/erts/configure.in b/erts/configure.in
index a73bb358a0..3dfd3fc7b7 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -537,6 +537,9 @@ else
fi
if test "x$GCC" = xyes; then
+ # Treat certain GCC warnings as errors
+ LM_TRY_ENABLE_CFLAG([-Werror=return-type], [WERRORFLAGS])
+
# until the emulator can handle this, I suggest we turn it off!
#WFLAGS="-Wall -Wshadow -Wcast-qual -Wmissing-declarations"
WFLAGS="-Wall -Wstrict-prototypes"
@@ -559,11 +562,13 @@ if test "x$GCC" = xyes; then
CFLAGS=$saved_CFLAGS
else
WFLAGS=""
+ WERRORFLAGS=""
fi
dnl DEBUG_FLAGS is obsolete (I hope)
AC_SUBST(DEBUG_FLAGS)
AC_SUBST(DEBUG_CFLAGS)
AC_SUBST(WFLAGS)
+AC_SUBST(WERRORFLAGS)
AC_SUBST(CFLAG_RUNTIME_LIBRARY_PATH)
AC_CHECK_SIZEOF(void *) # Needed for ARCH and smp checks below
@@ -4498,7 +4503,7 @@ dnl needs to be rebuilt.
dnl
AC_DEFINE_UNQUOTED(ERTS_EMU_CMDLINE_FLAGS,
-"$STATIC_CFLAGS $CFLAGS $DEBUG_CFLAGS $EMU_THR_DEFS $DEFS $WFLAGS",
+"$STATIC_CFLAGS $CFLAGS $DEBUG_CFLAGS $EMU_THR_DEFS $DEFS $WERRORFLAGS $WFLAGS",
[The only reason ERTS_EMU_CMDLINE_FLAGS exists is to force modification of config.h when the emulator command line flags are modified by configure])
dnl ----------------------------------------------------------------------
@@ -4561,6 +4566,10 @@ AH_BOTTOM([
#endif
])
+if test "x$GCC" = xyes; then
+ CFLAGS="$WERRORFLAGS $CFLAGS"
+fi
+
dnl ----------------------------------------------------------------------
dnl Output the result.
dnl ----------------------------------------------------------------------