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Allow coverage with clang. 

Note that this doesn't play nicely with acov out of the box. Clang
apparently generates .gcno files that aren't compatible with gcov-4.8.
This can be solved by installing gcc-4.6 and invoking lcov with
`--gcov-tool /usr/bin/gcov-4.6`.

http://stackoverflow.com/questions/17758126/clang-code-coverage-invalid-output

Change-Id: I79547e1c579fa79db47ff07d5e90c42cedbd5cbb
This commit is contained in:
Dan Albert 2015-01-24 15:14:35 -08:00
parent 43e128acfc
commit 2c03e04480
1 changed files with 16 additions and 14 deletions
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30
core/binary.mk
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@ -287,20 +287,22 @@ endif # LOCAL_IS_HOST_MODULE
# clean build of your module after toggling it.
ifeq ($(NATIVE_COVERAGE),true)
ifeq ($(my_native_coverage),true)
# We can't currently generate coverage for clang binaries for two
# reasons:
#
# 1) b/17574078 We currently don't have a prebuilt
# libclang_rt.profile-<ARCH>.a, which clang is hardcoded to link if
# --coverage is passed in the link stage. For now we manually link
# libprofile_rt (which is the name it is built as from
# external/compiler-rt).
#
# 2) b/17583330 Clang doesn't generate .gcno files when using
# -no-integrated-as. Since most of the assembly in our tree is
# incompatible with clang's assembler, we can't turn off this flag.
ifneq ($(my_clang),true)
my_cflags += --coverage -O0
my_cflags += --coverage -O0
ifeq ($(my_clang),true)
# b/17574078
# We currently don't have a prebuilt libclang_rt.profile-<ARCH>.a,
# which clang is hardcoded to link if --coverage is passed in the
# link stage. For now we manually link libprofile_rt (which is the
# name it is built as from external/compiler-rt).
#
# Note that clang coverage doesn't play nicely with acov out of the
# box. Clang apparently generates .gcno files that aren't compatible
# with gcov-4.8. This can be solved by installing gcc-4.6 and
# invoking lcov with `--gcov-tool /usr/bin/gcov-4.6`.
#
# http://stackoverflow.com/questions/17758126/clang-code-coverage-invalid-output
my_static_libraries += libprofile_rt
else
my_ldflags += --coverage
endif
endif