Commit 17653702 authored by David Fuhrmann's avatar David Fuhrmann

m4: fix detection of supported "-Wxxx" flags with clang

Clang does not fail, but only prints a warning by default for unknown
-W options.
parent 36cb0f52
......@@ -13,7 +13,7 @@ AC_DEFUN([RDC_PROG_CC_FLAGS_IFELSE],
as_ac_var=`echo "ac_cv_prog_cc_flags_$1" | $as_tr_sh`
AC_CACHE_CHECK([if $CC accepts $1], [$as_ac_var], [
CFLAGS="${CFLAGS} -Werror $1"
eval "$as_ac_var=yes"
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