From: Daniel Díaz daniel.diaz@linaro.org
[ Upstream commit fa5c893181ed2ca2f96552f50073786d2cfce6c0 ]
When using a cross-compilation environment, such as OpenEmbedded, the CC an CXX variables are set to something more than just a command: there are arguments (such as --sysroot) that need to be passed on to the compiler so that the right set of headers and libraries are used.
For the particular case that our systems detected, CC is set to the following:
export CC="aarch64-linaro-linux-gcc --sysroot=/oe/build/tmp/work/machine/perf/1.0-r9/recipe-sysroot"
Without quotes, detection is as follows:
Auto-detecting system features: ... dwarf: [ OFF ] ... dwarf_getlocations: [ OFF ] ... glibc: [ OFF ] ... gtk2: [ OFF ] ... libbfd: [ OFF ] ... libcap: [ OFF ] ... libelf: [ OFF ] ... libnuma: [ OFF ] ... numa_num_possible_cpus: [ OFF ] ... libperl: [ OFF ] ... libpython: [ OFF ] ... libcrypto: [ OFF ] ... libunwind: [ OFF ] ... libdw-dwarf-unwind: [ OFF ] ... zlib: [ OFF ] ... lzma: [ OFF ] ... get_cpuid: [ OFF ] ... bpf: [ OFF ] ... libaio: [ OFF ] ... libzstd: [ OFF ] ... disassembler-four-args: [ OFF ]
Makefile.config:414: *** No gnu/libc-version.h found, please install glibc-dev[el]. Stop. Makefile.perf:230: recipe for target 'sub-make' failed make[1]: *** [sub-make] Error 2 Makefile:69: recipe for target 'all' failed make: *** [all] Error 2
With CC and CXX quoted, some of those features are now detected.
Fixes: e3232c2f39ac ("tools build feature: Use CC and CXX from parent") Signed-off-by: Daniel Díaz daniel.diaz@linaro.org Reviewed-by: Thomas Hebb tommyhebb@gmail.com Cc: Alexei Starovoitov ast@kernel.org Cc: Andrii Nakryiko andriin@fb.com Cc: Daniel Borkmann daniel@iogearbox.net Cc: Jiri Olsa jolsa@kernel.org Cc: John Fastabend john.fastabend@gmail.com Cc: KP Singh kpsingh@chromium.org Cc: Martin KaFai Lau kafai@fb.com Cc: Namhyung Kim namhyung@kernel.org Cc: Song Liu songliubraving@fb.com Cc: Stephane Eranian eranian@google.com Cc: Yonghong Song yhs@fb.com Link: http://lore.kernel.org/lkml/20200812221518.2869003-1-daniel.diaz@linaro.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/build/Makefile.feature | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/build/Makefile.feature b/tools/build/Makefile.feature index a2389f0c0b1c0..79427b09590c5 100644 --- a/tools/build/Makefile.feature +++ b/tools/build/Makefile.feature @@ -7,7 +7,7 @@ endif
feature_check = $(eval $(feature_check_code)) define feature_check_code - feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CC=$(CC) CXX=$(CXX) CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0) + feature-$(1) := $(shell $(MAKE) OUTPUT=$(OUTPUT_FEATURES) CC="$(CC)" CXX="$(CXX)" CFLAGS="$(EXTRA_CFLAGS) $(FEATURE_CHECK_CFLAGS-$(1))" CXXFLAGS="$(EXTRA_CXXFLAGS) $(FEATURE_CHECK_CXXFLAGS-$(1))" LDFLAGS="$(LDFLAGS) $(FEATURE_CHECK_LDFLAGS-$(1))" -C $(feature_dir) $(OUTPUT_FEATURES)test-$1.bin >/dev/null 2>/dev/null && echo 1 || echo 0) endef
feature_set = $(eval $(feature_set_code))