gcov: docs: add a note on GCC vs Clang differences
Document some things of note to gcov users: 1. GCC gcov and Clang llvm-cov tools are not compatible. 2. The use of GCC vs Clang is transparent at build-time. Also adjust the documentation to account for the removal of config symbol CONFIG_GCOV_FORMAT_AUTODETECT by commit 6a61b70b ("gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT"). Link: http://lkml.kernel.org/r/20190318025411.98014-4-trong@android.comSigned-off-by: Tri Vo <trong@android.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Daniel Mentz <danielmentz@google.com> Cc: Greg Hackmann <ghackmann@android.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Petri Gynther <pgynther@google.com> Cc: Prasad Sodagudi <psodagud@quicinc.com> Cc: Trilok Soni <tsoni@quicinc.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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