kernel/linux.git/tools/build/feature, branch v4.6.4

perf probe: Check if dwarf_getlocations() is available

2016-05-12T14:26:59+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

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

2016-01-27T14:59:32+00:00

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: Add BPF feature check to test-all

2016-01-11T22:22:21+00:00

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

2016-01-11T22:22:20+00:00

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: Fix feature Makefile issues with 'O='

2015-12-16T18:31:33+00:00

When building perf binaries outside the source tree with 'make O=', the auto-detected features get re-tested for every build, which is unnecessary and inconsistent with the behavior seen when building directly in the source tree. Another issue is that 'make O= clean' doesn't remove the feature files from the object tree. Fix these problems by looking for the binaries in the $(OUTPUT) directory. Signed-off-by: Josh Poimboeuf Acked-by: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/113bd01530e9761778c60a75a96c65fc59860f68.1450193761.git.jpoimboe@redhat.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Fix libiberty feature detection

2015-10-29T20:46:35+00:00

Any CFLAGS or LDFLAGS set by the user need to be passed to the feature build command. This many include for example -I or -L to point to libraries and include files in custom paths. In most of the test-*.bin rules in build/feature/Makefile, we use the BUILD macro which always sends in CFLAGS and LDFLAGS. The libiberty build line however doesn't use the BUILD macro and thus needs to send in CFLAGS and LDFLAGS explicitly. Without this, when using custom CFLAGS/LDFLAGS, libiberty fails to be detected and the perf link fails with something like: LINK perf libbfd.a(bfd.o): In function `bfd_errmsg': bfd.c:(.text+0x168): undefined reference to `xstrerror' bbfd.a(opncls.o): In function `_bfd_new_bfd': opncls.c:(.text+0xe8): undefined reference to `objalloc_create' ... Signed-off-by: Rabin Vincent Acked-by: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Rabin Vincent Link: http://lkml.kernel.org/r/1446104978-26429-2-git-send-email-rabin.vincent@axis.com Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add test for presence of __get_cpuid() gcc builtin

2015-09-17T16:14:35+00:00

The auxtrace code needed by Intel PT uses the __get_cpuid() gcc builtin, that is not present in old systems, breaking the build. Add a test to check for that builtin and disable AUXTRACE in those systems. [acme@rhel5 linux]$ make NO_LIBPERL=1 -C tools/perf O=/tmp/build/perf install-bin make: Entering directory `/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j2' parallel build Auto-detecting system features: ... lzma: [ on ] ... get_cpuid: [ OFF ] config/Makefile:630: Your gcc lacks the __get_cpuid() builtin, disables support for auxtrace/Intel PT, please install a newer gcc MKDIR /tmp/build/perf/util/ This fixes the build on old systems such as RHEL/CentOS 5.11. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: "Naveen N. Rao" Cc: Peter Zijlstra Cc: Srikar Dronamraju Cc: Stephane Eranian Cc: Victor Kamensky Cc: Vinson Lee Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-d4puslul0jltoodzpx9r4sje@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

tools build: Add test for presence of numa_num_possible_cpus() in libnuma

2015-09-17T16:14:35+00:00

The existing numa test checks only if numa.h and numa_available() are present, but that can be satisfied with an old libnuma that is not enough for the 'perf bench numa' entry, so add a test to check for that: [acme@rhel5 linux]$ make NO_AUXTRACE=1 NO_LIBPERL=1 -C tools/perf O=/tmp/build/perf install-bin make: Entering directory `/home/acme/git/linux/tools/perf' BUILD: Doing 'make -j2' parallel build Auto-detecting system features: ... libelf: [ on ] ... libnuma: [ on ] ... numa_num_possible_cpus: [ OFF ] ... libperl: [ on ] config/Makefile:577: Old numa library found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev >= 2.0.8 INSTALL binaries This fixes the build on old systems such as RHEL/CentOS 5.11. Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Namhyung Kim Cc: "Naveen N. Rao" Cc: Peter Zijlstra Cc: Srikar Dronamraju Cc: Stephane Eranian Cc: Victor Kamensky Cc: Vinson Lee Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-zqriqkezppi2de2iyjin1tnc@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Support static linking with libdw

2015-08-13T17:49:11+00:00

The Fedora 22 version of libdw requires a couple of extra libraries to link. With a dynamic link the dependencies are pulled in automatically, but this doesn't work for static linking. Add the needed libraries explicitely to the feature probe and the Makefile. v2: Explicitly check for static linking and only add the dependencies when -static is set. This is to avoid regressions on Arnaldo's system. Signed-off-by: Andi Kleen Cc: Jiri Olsa Link: http://lkml.kernel.org/r/1439419717-20601-1-git-send-email-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo