diff options
| author |   He Kuang <hekuang@huawei.com> | 2016-06-15 11:03:56 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-06-15 10:27:11 -0300 |
| commit | 906a8276429c7eb3b53676dab4e2acb632ffcc5a (patch) | |
| tree | b57313d9e605041fc91701c1f6ab5ae737d0c92e /tools/perf | |
| parent | perf probe: Uncomment and export synthesize_perf_probe_point() (diff) | |
| download | linux-dev-906a8276429c7eb3b53676dab4e2acb632ffcc5a.tar.xz linux-dev-906a8276429c7eb3b53676dab4e2acb632ffcc5a.zip | |
perf unwind: Fix compile error for static cross build
Build failure for static cross-compiling on aarch64, with libunwind-x86
provided:
$ file ./libunwind_for_x86_on_aarch64/lib/libunwind-x86.so.8.0.1
libunwind-x86.so.8.0.1: ELF 64-bit LSB shared object, ARM aarch64,
version 1 (SYSV), dynamically linked, not stripped
$ make LDFLAGS=-static LIBUNWIND_DIR=./libunwind_for_x86_on_aarch64
ARCH=aarch64 CROSS_COMPILE=aarch64-buildroot-linux-gnu-
~/libperf.a(libperf-in.o): In function `find_proc_info':
:(.text+0xae4ac): undefined reference to `_Ux86_dwarf_search_unwind_table'
~/libperf.a(libperf-in.o): In function `_unwind__prepare_access':
:(.text+0xaedd0): undefined reference to `_Ux86_create_addr_space'
:(.text+0xaee24): undefined reference to `_Ux86_set_caching_policy'
~/libperf.a(libperf-in.o): In function `_unwind__flush_access':
:(.text+0xaee98): undefined reference to `_Ux86_flush_cache'
~/libperf.a(libperf-in.o): In function `_unwind__finish_access':
:(.text+0xaef08): undefined reference to `_Ux86_destroy_addr_space'
~/libperf.a(libperf-in.o): In function `get_entries':
:(.text+0xaf148): undefined reference to `_Ux86_init_remote'
:(.text+0xaf184): undefined reference to `_Ux86_get_reg'
:(.text+0xaf1a4): undefined reference to `_Ux86_step'
collect2: error: ld returned 1 exit status
Makefile.perf:350: recipe for target '~/perf' failed
make[1]: *** [~/perf] Error 1
Makefile:68: recipe for target 'all' failed
make: *** [all] Error 2
This is because the remote libunwind library detected is not appended to
EXTLIBS variable, which will be included between 'start-group' and
'end-group' when linking.
The existing variable LIBUNWIND_LIBS is assigned to libs for local
unwind, this patch introduces a new variable EXTLIBS_LIBUNWIND for
storing remote libunwind libraries instead.
Signed-off-by: He Kuang <hekuang@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1465988636-81502-1-git-send-email-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/config/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile index 098874b99981..80018feb99c0 100644 --- a/tools/perf/config/Makefile +++ b/tools/perf/config/Makefile @@ -365,6 +365,7 @@ ifndef NO_LIBUNWIND $(call detected,CONFIG_LIBUNWIND_X86) CFLAGS += -DHAVE_LIBUNWIND_X86_SUPPORT LDFLAGS += -lunwind-x86 + EXTLIBS_LIBUNWIND += -lunwind-x86 have_libunwind = 1 endif @@ -372,6 +373,7 @@ ifndef NO_LIBUNWIND $(call detected,CONFIG_LIBUNWIND_AARCH64) CFLAGS += -DHAVE_LIBUNWIND_AARCH64_SUPPORT LDFLAGS += -lunwind-aarch64 + EXTLIBS_LIBUNWIND += -lunwind-aarch64 have_libunwind = 1 $(call feature_check,libunwind-debug-frame-aarch64) ifneq ($(feature-libunwind-debug-frame-aarch64), 1) @@ -449,6 +451,7 @@ ifndef NO_LIBUNWIND CFLAGS += -DHAVE_LIBUNWIND_SUPPORT CFLAGS += $(LIBUNWIND_CFLAGS) LDFLAGS += $(LIBUNWIND_LDFLAGS) + EXTLIBS += $(EXTLIBS_LIBUNWIND) endif ifndef NO_LIBAUDIT |