linux/tools/build, branch v4.6

perf probe: Check if dwarf_getlocations() is available

2016-05-12T14:26:59Z

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

tools build: Use .s extension for preprocessed assembler code

2016-03-03T14:10:37Z

The "man gcc" says .i extension represents the file is C source code that should not be preprocessed. Here, .s should be used. For clarification, .c ---(preprocess)---> .i .S ---(preprocess)---> .s Signed-off-by: Masahiro Yamada Acked-by: Jiri Olsa Cc: Aaro Koskinen Cc: Adrian Hunter Cc: Lukas Wunner Link: http://lkml.kernel.org/r/1454263140-19670-1-git-send-email-yamada.masahiro@socionext.com Signed-off-by: Arnaldo Carvalho de Melo

perf build: Add libcrypto feature detection

2016-02-05T12:46:45Z

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

2016-01-28T22:04:19Z

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

tools build: Check basic headers for test-compile feature checker

2016-01-27T14:59:32Z

An i386 binary can be linked correctly even without correct headers. Which causes problem. For exmaple: $ mv /tmp/oxygen_root/usr/include/gnu/stubs-32.h{,.bak} $ make tools/perf Auto-detecting system features: ... dwarf: [ on ] [SNIP] GEN common-cmds.h CC perf-read-vdso32 In file included from /tmp/oxygen_root/usr/include/features.h:388:0, from /tmp/oxygen_root/usr/include/stdio.h:27, from perf-read-vdso.c:1: /tmp/oxygen_root/usr/include/gnu/stubs.h:7:27: fatal error: gnu/stubs-32.h: No such file or directory # include ^ compilation terminated. ... In this patch we checks not only compiler and linker, but also basic headers in test-compile test case, make it fail on a platform lacking correct headers. Signed-off-by: Wang Nan Acked-by: Jiri Olsa Cc: Li Zefan Link: http://lkml.kernel.org/r/1453893742-20603-1-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Allow subprojects select all feature checkers

2016-01-26T15:12:48Z

Put feature checkers not in original FEATURE_TESTS to a new list and allow subproject select all feature checkers by setting FEATURE_TESTS to 'all'. Signed-off-by: Wang Nan Cc: "David S. Miller" Cc: Alexei Starovoitov Cc: Brendan Gregg Cc: Daniel Borkmann Cc: He Kuang Cc: Jiri Olsa Cc: Li Zefan Cc: Masami Hiramatsu Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Will Deacon Link: http://lkml.kernel.org/r/1453715801-7732-4-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add BPF feature check to test-all

2016-01-11T22:22:21Z

The test-all.c file doesn't check BPF related features. For an environment with all other features enabled, BPF would be considered enabled without doing real feature check. This patch adds test-bpf.c into test-all.c. Signed-off-by: Wang Nan Acked-by: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452520124-2073-11-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Fix PowerPC native building

2016-01-11T22:22:20Z

Checks BPF syscall number, turn off libbpf building on platform doesn't correctly support sys_bpf instead of blocking compiling. Reported-and-Tested-by: Naveen N. Rao Signed-off-by: Wang Nan Acked-by: Jiri Olsa Cc: Sukadev Bhattiprolu Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1452520124-2073-7-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo

tools build feature: Use value assignment form for FEATURE-DUMP file

2016-01-06T23:11:14Z

Changing the contents of the FEATURE-DUMP file, so it looks like: feature-backtrace=1 feature-dwarf=0 feature-fortify-source=1 feature-sync-compare-and-swap=0 This way it could get included in sub projects, so they won't be forced to redo features detection. Also now storing the complete set of features. Signed-off-by: Jiri Olsa Tested-by: Wang Nan Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Zefan Li Cc: pi3orama Link: http://lkml.kernel.org/r/1450893514-9158-5-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools build feature: Introduce feature_assign macro

2016-01-06T23:11:13Z

The feature_assign macro generates feature value assignment for name, like: $(call feature_assign,dwarf) == feature-dwarf=1 This will be used more in following patches. Signed-off-by: Jiri Olsa Tested-by: Wang Nan Cc: David Ahern Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Zefan Li Cc: pi3orama Link: http://lkml.kernel.org/r/1450893514-9158-4-git-send-email-jolsa@kernel.org [ Rename it to feature_assign, the original shorter name was misleading, to say the least ;-) ] Signed-off-by: Arnaldo Carvalho de Melo