linux.git/tools/build/Makefile.feature, branch master

tools build: Move tabs to spaces where suitable

2016-12-05T19:06:03+00:00

We've been hit several times by a Makefile bug where line indented by tab was falsely considered as target command. We prevent this by always using space indentation for everything except for the target commands. Signed-off-by: Jiri Olsa Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1480884178-8072-3-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add feature detection for g++

2016-10-05T22:59:35+00:00

Check if g++ is available. The result will be used by builtin clang and LLVM support. Since LLVM requires C++11, this feature detector checks std::move(). Signed-off-by: Wang Nan Cc: Alexei Starovoitov Cc: He Kuang Cc: Jiri Olsa Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1474874832-134786-3-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add sdt feature detection

2016-07-14T02:09:09+00:00

This checks whether sys/sdt.h is available or not, which is required for DTRACE_PROBE(). We can disable this feature by passing NO_SDT=1 when building. This flag will be used for SDT test case and further SDT events in perftools. Signed-off-by: Masami Hiramatsu Cc: Ananth N Mavinakayanahalli Cc: Brendan Gregg Cc: Hemant Kumar Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/146831795615.17065.17513820540591053933.stgit@devbox Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Add feature detection for gelf_getnote()

2016-07-12T18:20:41+00:00

That is not present on some libelf implementations, such as the one used in Alpine Linux: libelf-0.8.13. This ends up disabling the SDT code, that relies on this function. One alternative would be to provide an weak fallback implementation or the open coded variant used by the buildid sysfs notes reading code. Cc: Adrian Hunter Cc: Ananth N Mavinakayanahalli Cc: Brendan Gregg Cc: David Ahern Cc: Hemant Kumar Cc: Jiri Olsa Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-82lh22ybedy9b9lych8xj12g@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add feature detection for libelf's elf_getshdrstrndx()

2016-07-04T22:38:59+00:00

That appeared after 0.140, and will be used in the SDT code, so, to avoid bisection break on older systems, add a feature detection and provide a stub with a pr_debug() to keep it building. Cc: Ananth N Mavinakayanahalli Cc: Brendan Gregg Cc: Hemant Kumar Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-80y0eldgweorqnwha9rvfxjr@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add build-test for debug-frame on arm/arm64

2016-05-11T15:24:58+00:00

Debug-frame for remote platforms is not related to the host platform, so we should test each platform separately. Signed-off-by: He Kuang Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: David Ahern Cc: Ekaterina Tumanova Cc: Josh Poimboeuf Cc: Kan Liang Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Pekka Enberg Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Sukadev Bhattiprolu Cc: Wang Nan Link: http://lkml.kernel.org/r/1462866037-30382-5-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add build-test for libunwind cross-platforms support

2016-05-11T15:24:58+00:00

Currently only test for local libunwind. We should check all supported platforms so we can use them to parse perf.data with callchain info on different machines. Signed-off-by: He Kuang Acked-by: Jiri Olsa Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: David Ahern Cc: Ekaterina Tumanova Cc: Josh Poimboeuf Cc: Kan Liang Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Pekka Enberg Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Sukadev Bhattiprolu Cc: Wang Nan Link: http://lkml.kernel.org/r/1462866037-30382-4-git-send-email-hekuang@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf probe: Check if dwarf_getlocations() is available

2016-04-06T13:44:28+00:00

If not, tell the user that: config/Makefile:273: Old libdw.h, finding variables at given 'perf probe' point will not work, install elfutils-devel/libdw-dev >= 0.157 And return -ENOTSUPP in die_get_var_range(), failing features that need it, like the one pointed out above. This fixes the build on older systems, such as Ubuntu 12.04.5. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Vinson Lee Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-9l7luqkq4gfnx7vrklkq4obs@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add libcrypto feature detection

2016-02-05T12:46:45+00:00

Will be used to generate build-ids in the jitdump code. Signed-off-by: Stephane Eranian Cc: Adrian Hunter Cc: Andi Kleen Cc: Carl Love Cc: David Ahern Cc: Jiri Olsa Cc: John McCutchan Cc: Namhyung Kim Cc: Pawel Moll Cc: Peter Zijlstra Cc: Sonny Rao Cc: Sukadev Bhattiprolu Link: http://lkml.kernel.org/r/1448874143-7269-3-git-send-email-eranian@google.com [ tools/perf/Makefile.perf comment about NO_LIBCRYPTO and added it to tests/make ] Signed-off-by: Arnaldo Carvalho de Melo

perf build: Fix feature-dump checks, we need to test all features

2016-01-28T22:04:19+00:00

I see problem with test-all case speedup, because it does not comprise checks for 32bits compilations, fix it. The problem could be noticed by calling: make -C tools/perf feature-dump That would end up misdetecting the feature-compile-x32, that, building using 'gcc -mx32' needs stub headers not present in a fedora 23 devel machine and thus fail to compile, but ended up appearing as detected, i.e. present in tools/perf/FEATURE-DUMP as 'feature-compile-x32=1'. With this fix it correctly appears as 'feature-compile-x32=0' and if we uninstall the libc devel files for 32 bits (glibc-devel.i686), then the relevant variable is flipped from 'feature-compile-32=1' to 'feature-compile-32=0'. The same things happened for bionic and libbabeltrace, that were misdetected because the are no tested in test-all.c Reported-and-Tested-by: Arnaldo Carvalho de Melo Signed-off-by: Jiri Olsa Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-u0sjaddf1r9m8icpd98ry7fz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo