tracing: Avoid calling cc-option -mrecord-mcount for every Makefile

[linux-2.6-block.git] / Makefile

diff --git a/Makefile b/Makefile
index 489de42d30c7028c9b6d599bd2d4efd324a335c6..2c92ebf59a34fd84137ba240bb93dad677c30c75 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -743,6 +743,13 @@ ifdef CONFIG_FUNCTION_TRACER
 ifndef CC_FLAGS_FTRACE
 CC_FLAGS_FTRACE := -pg
 endif
+ifdef CONFIG_FTRACE_MCOUNT_RECORD
+  # gcc 5 supports generating the mcount tables directly
+  ifeq ($(call cc-option-yn,-mrecord-mcount),y)
+    CC_FLAGS_FTRACE    += -mrecord-mcount
+    export CC_USING_RECORD_MCOUNT := 1
+  endif
+endif
 ifdef CONFIG_HAVE_FENTRY
   ifeq ($(call cc-option-yn, -mfentry),y)
     CC_FLAGS_FTRACE    += -mfentry