Messages in this thread | | | Date | Mon, 07 Sep 2009 10:24:52 +0200 | From | Peter Oberparleiter <> | Subject | Re: [RFC Patch 0/5] gcov: integrate gcov into kbuild |
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Amerigo Wang wrote: > This patchset is mainly to integrate gcov into kbuild system, so that > we can use "make foo/bar.c.gcov" to get the gcov files. > Also moves the useful scripts in gcov.txt into tools/gcov/ direcotry.
Interesting approach - this should definitely make it more easy for developers to get coverage data for their code. A couple of thoughts/observations:
- does not work when compiling with a separate build directory (make O=)
/sys/kernel/debug/gcov//mnt/out//mnt/linux-2.6.gcno:cannot open graph file make[2]: *** [init/main.c.gcov] Error 1 make[1]: *** [init/main.c.gcov] Error 2 make: *** [sub-make] Error 2
This is most likely due to target_base_name being an absolute path (relative to srctree) in case build and source directories are different.
- gcov call should use option -p, otherwise gcov may overwrite .gcov files if a .c file includes two .h files from different directories. - an option to generate .gcov files for all .c files in a subdirectory would be nice
Regards, Peter Oberparleiter
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