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-rw-r--r--tools/lib/traceevent/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index 14131cb0522d..04d959fa0226 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -129,7 +129,7 @@ CFLAGS ?= -g -Wall
# Append required CFLAGS
override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
-override CFLAGS += $(udis86-flags)
+override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
ifeq ($(VERBOSE),1)
Q =