Add option for generating coverage info.
To enable building with coverage, the environment variable
NATIVE_COVERAGE must be set to true.
Set `LOCAL_NATIVE_COVERAGE := true` to generate coverage information for
a given component.
This is currently not supported for clang (b/17574078, b/17583330).
If static library A is included in a binary B (dynamic or static
executable, or shared library), and A is built with coverage
information, B is required to link with libgcov.a. Since the make does
not offer a good way to track this dependency, link libgcov.a even if
LOCAL_NATIVE_COVERAGE is not set (but still guarded by NATIVE_COVERAGE).
This ensures that all of the libgcov dependencies will always be
resolved, and causes no change in the resulting binary if coverage is
not used.
Bug: 10134489
Change-Id: Id5a19f2c215e4be80e6eae27ecc19b582f2f6813
diff --git a/core/combo/TARGET_linux-arm.mk b/core/combo/TARGET_linux-arm.mk
index c9a34e7..2d7faae 100644
--- a/core/combo/TARGET_linux-arm.mk
+++ b/core/combo/TARGET_linux-arm.mk
@@ -164,7 +164,7 @@
$($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-libgcc-file-name)
$(combo_2nd_arch_prefix)TARGET_LIBATOMIC := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) \
$($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) -print-file-name=libatomic.a)
-target_libgcov := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
+$(combo_2nd_arch_prefix)TARGET_LIBGCOV := $(shell $($(combo_2nd_arch_prefix)TARGET_CC) $($(combo_2nd_arch_prefix)TARGET_GLOBAL_CFLAGS) \
-print-file-name=libgcov.a)
endif
@@ -213,6 +213,7 @@
$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
$(PRIVATE_LDFLAGS) \
$(PRIVATE_TARGET_LIBATOMIC) \
+ $(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_SO_O)) \
$(PRIVATE_LDLIBS)
@@ -240,6 +241,7 @@
$(PRIVATE_TARGET_GLOBAL_LDFLAGS) \
$(PRIVATE_LDFLAGS) \
$(PRIVATE_TARGET_LIBATOMIC) \
+ $(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O)) \
$(PRIVATE_LDLIBS)
@@ -263,6 +265,7 @@
$(call normalize-target-libraries,$(filter %libc_nomalloc.a,$(PRIVATE_ALL_STATIC_LIBRARIES))) \
$(PRIVATE_TARGET_FDO_LIB) \
$(PRIVATE_TARGET_LIBATOMIC) \
+ $(if $(filter true,$(NATIVE_COVERAGE)),$(PRIVATE_TARGET_LIBGCOV)) \
$(if $(PRIVATE_LIBCXX),,$(PRIVATE_TARGET_LIBGCC)) \
-Wl,--end-group \
$(if $(filter true,$(PRIVATE_NO_CRT)),,$(PRIVATE_TARGET_CRTEND_O))