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-rw-r--r--config.mak.dev10
1 files changed, 10 insertions, 0 deletions
diff --git a/config.mak.dev b/config.mak.dev
index 7673fed114..3deb076d5e 100644
--- a/config.mak.dev
+++ b/config.mak.dev
@@ -19,6 +19,16 @@ endif
endif
endif
endif
+
+ifneq ($(uname_S),FreeBSD)
+ifneq ($(or $(filter gcc6,$(COMPILER_FEATURES)),$(filter clang7,$(COMPILER_FEATURES))),)
+DEVELOPER_CFLAGS += -std=gnu99
+endif
+else
+# FreeBSD cannot limit to C99 because its system headers unconditionally
+# rely on C11 features.
+endif
+
DEVELOPER_CFLAGS += -Wdeclaration-after-statement
DEVELOPER_CFLAGS += -Wformat-security
DEVELOPER_CFLAGS += -Wold-style-definition