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-rw-r--r--Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 26fa8baf6..f029225f2 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ op_xml_obj = $(op_xml_src:.xml.in=.xml)
# -P Inhibit generation of linemarkers in the output from the
# preprocessor
mkdir -p $(BUILD_DIR)/$(dir $@)
- @$(CC) -x c-header -E -undef -nostdinc -P -I$(CURDIR)/$(dir $<) -o $(BUILD_DIR)/$@ -c $<
+ @$(CC) -x c-header -C -E -undef -nostdinc -P -I$(CURDIR)/$(dir $<) -o $(BUILD_DIR)/$@ -c $<
.PHONY: interface_definitions
.ONESHELL: