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tools build: Add test for sched_getcpu()

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Instead of trying to go on adding more ifdef conditions, do a feature
test and define HAVE_SCHED_GETCPU_SUPPORT instead, then use it to
provide the prototype. No need to change the stub, as it is already a
__weak symbol.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yge89er9g90sc0v6k0a0r5tr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2017-03-02 12:55:49 -03:00
parent e3ba76deef
commit 120010cb1e
7 changed files with 24 additions and 9 deletions
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1
tools/build/Makefile.feature
View File

@ -63,6 +63,7 @@ FEATURE_TESTS_BASIC := \
lzma \
get_cpuid \
bpf \
sched_getcpu \
sdt
# FEATURE_TESTS_BASIC + FEATURE_TESTS_EXTRA is the complete list

6
tools/build/feature/Makefile
View File

@ -48,7 +48,8 @@ FILES= \
test-get_cpuid.bin \
test-sdt.bin \
test-cxx.bin \
test-jvmti.bin
test-jvmti.bin \
test-sched_getcpu.bin
FILES := $(addprefix $(OUTPUT),$(FILES))
@ -91,6 +92,9 @@ $(OUTPUT)test-libelf.bin:
$(OUTPUT)test-glibc.bin:
$(BUILD)
$(OUTPUT)test-sched_getcpu.bin:
$(BUILD)
DWARFLIBS := -ldw
ifeq ($(findstring -static,${LDFLAGS}),-static)
DWARFLIBS += -lelf -lebl -lz -llzma -lbz2

5
tools/build/feature/test-all.c
View File

@ -117,6 +117,10 @@
# include "test-pthread-attr-setaffinity-np.c"
#undef main
#define main main_test_sched_getcpu
# include "test-sched_getcpu.c"
#undef main
# if 0
/*
* Disable libbabeltrace check for test-all, because the requested
@ -182,6 +186,7 @@ int main(int argc, char *argv[])
main_test_get_cpuid();
main_test_bpf();
main_test_libcrypto();
main_test_sched_getcpu();
main_test_sdt();
return 0;

7
tools/build/feature/test-sched_getcpu.c Normal file
View File

@ -0,0 +1,7 @@
#define _GNU_SOURCE
#include <sched.h>
int main(void)
{
return sched_getcpu();
}

4
tools/perf/Makefile.config
View File

@ -317,6 +317,10 @@ ifdef NO_DWARF
NO_LIBDW_DWARF_UNWIND := 1
endif
ifeq ($(feature-sched_getcpu), 1)
CFLAGS += -DHAVE_SCHED_GETCPU_SUPPORT
endif
ifndef NO_LIBELF
CFLAGS += -DHAVE_LIBELF_SUPPORT
EXTLIBS += -lelf

6
tools/perf/util/cloexec.h
View File

@ -3,10 +3,4 @@
unsigned long perf_event_open_cloexec_flag(void);
#ifdef __GLIBC_PREREQ
#if !__GLIBC_PREREQ(2, 6) && !defined(__UCLIBC__)
int sched_getcpu(void) __THROW;
#endif
#endif
#endif /* __PERF_CLOEXEC_H */

4
tools/perf/util/util.h
View File

@ -355,8 +355,8 @@ void print_binary(unsigned char *data, size_t len,
size_t bytes_per_line, print_binary_t printer,
void *extra);
#if !defined(__GLIBC__) && !defined(__ANDROID__)
extern int sched_getcpu(void);
#ifndef HAVE_SCHED_GETCPU_SUPPORT
int sched_getcpu(void);
#endif
int is_printable_array(char *p, unsigned int len);