[Xen-devel] [RFC PATCH 8/8] gcov: provide the capability to select gcov format automatically

[Wei Liu <wei.liu2@xxxxxxxxxx>]

And make it the default in Kconfig.

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/Kconfig.debug        | 9 ++++++++-
 xen/common/gcov/Makefile | 2 ++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/xen/Kconfig.debug b/xen/Kconfig.debug
index a8eb668..03a58a7 100644
--- a/xen/Kconfig.debug
+++ b/xen/Kconfig.debug
@@ -38,10 +38,17 @@ config GCOV
 choice
        prompt "Specify Gcov format"
        depends on GCOV
-       default GCOV_FORMAT_4_7
+       default GCOV_FORMAT_AUTODETECT
        ---help---
        The gcov format is determined by gcc version.
 
+       If unsure, choose "Autodetect".
+
+config GCOV_FORMAT_AUTODETECT
+       bool "Autodetect"
+       ---help---
+       Automatically select gcov format based on GCC version.
+
 config GCOV_FORMAT_4_7
        bool "GCC 4.7 format"
        ---help---
diff --git a/xen/common/gcov/Makefile b/xen/common/gcov/Makefile
index 03ac1e5..c778334 100644
--- a/xen/common/gcov/Makefile
+++ b/xen/common/gcov/Makefile
@@ -1,3 +1,5 @@
 obj-y += gcov_base.o gcov.o
 obj-$(CONFIG_GCOV_FORMAT_3_4) += gcc_3_4.o
 obj-$(CONFIG_GCOV_FORMAT_4_7) += gcc_4_7.o
+obj-$(CONFIG_GCOV_FORMAT_AUTODETECT) += $(call cc-ifversion, -ge, 0x040700, \
+                                               gcc_4_7.o, gcc_3_4.o)
-- 
2.1.4


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