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-rw-r--r--gcc/fortran/lang-specs.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/fortran/lang-specs.h b/gcc/fortran/lang-specs.h
index a622dcb..4fe24de 100644
--- a/gcc/fortran/lang-specs.h
+++ b/gcc/fortran/lang-specs.h
@@ -28,7 +28,7 @@
%{O*} %{undef}"
/* Options that f951 should know about, even if not preprocessing. */
-#define CPP_FORWARD_OPTIONS "%{i*} %{I*}"
+#define CPP_FORWARD_OPTIONS "%{i*} %{I*} %{M*}"
#define F951_CPP_OPTIONS "%{!nocpp: -cpp %g.f90 %{E} %(cpp_unique_options) \
%{E|M|MM:%(cpp_debug_options) " CPP_ONLY_OPTIONS \