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2015-11-26tools build: Use fixdep with OUTPUT path prefixJiri Olsa
Adding OUTPUT path prefix for fixdep target so we use it properly in out of tree builds. If the fixdep already existed in the tree, the out of tree build would see it already exist and did not build the out of tree version, as reported by Arnaldo: [acme@zoo linux]$ make O=/tmp/build/perf -C tools/perf make: Entering directory '/home/git/linux/tools/perf' BUILD: Doing 'make -j4' parallel build make[2]: Nothing to be done for 'fixdep'. make: Leaving directory '/home/git/linux/tools/perf' Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20151126185055.GC19410@krava.brq.redhat.com [ Fixed conflict with 5725dd8fa888 ("tools build: Clean CFLAGS and LDFLAGS for fixdep") ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-11-25tools build: Clean CFLAGS and LDFLAGS for fixdepWang Nan
Sometimes passing variables to tools/build is dangerous. For example, on my platform there is a gcc problem (gcc 4.8.1): It passes the stackprotector-all feature check: $ gcc -fstack-protector-all -c ./test.c $ echo $? 0 But requires LDFLAGS support if separate compiling and linking: $ gcc -fstack-protector-all -c ./test.c $ gcc ./test.o ./test.o: In function `main': test.c:(.text+0xb): undefined reference to `__stack_chk_guard' test.c:(.text+0x21): undefined reference to `__stack_chk_guard' collect2: error: ld returned 1 exit status $ gcc -fstack-protector-all ./test.o $ echo $? 0 $ gcc ./test.o -lssp $ echo $? 0 $ In this environment building perf throws an error: $ make BUILD: Doing 'make -j24' parallel build config/Makefile:344: No libunwind found. Please install libunwind-dev[el] >= 1.1 and/or set LIBUNWIND_DIR config/Makefile:403: No libaudit.h found, disables 'trace' tool, please install audit-libs-devel or libaudit-dev config/Makefile:418: slang not found, disables TUI support. Please install slang-devel or libslang-dev config/Makefile:432: GTK2 not found, disables GTK2 support. Please install gtk2-devel or libgtk2.0-dev config/Makefile:564: No bfd.h/libbfd found, please install binutils-dev[el]/zlib-static/libiberty-dev to gain symbol demangling config/Makefile:606: No numa.h found, disables 'perf bench numa mem' benchmark, please install numactl-devel/libnuma-devel/libnuma-dev CC fixdep.o LD fixdep-in.o LINK fixdep fixdep-in.o: In function `parse_dep_file': /kernel/tools/build/fixdep.c:47: undefined reference to `__stack_chk_guard' /kernel/tools/build/fixdep.c:117: undefined reference to `__stack_chk_guard' fixdep-in.o: In function `main': /kernel-hydrogen/tools/build/fixdep.c:156: undefined reference to `__stack_chk_guard' /kernel/tools/build/fixdep.c:168: undefined reference to `__stack_chk_guard' collect2: error: ld returned 1 exit status make[2]: *** [fixdep] Error 1 make[1]: *** [fixdep] Error 2 make: *** [all] Error 2 This is because the CFLAGS used in building perf pollutes the CFLAGS used for fixdep, passing -fstack-protector-all to buiold fixdep which is obviously not required. Since fixdep is a small host side tool, we should keep its CFLAGS/LDFLAGS simple and clean. This patch clears the CFLAGS and LDFLAGS passed when building fixdep, so such gcc problem won't block the perf build process. Signed-off-by: Wang Nan <wangnan0@huawei.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1448372181-151723-2-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-10-13tools build: Fix cross compile buildJiri Olsa
He Kuang the new fixdep tool breaks cross compiling. The reason is it wouldn't get compiled under host arch, but under cross arch and failed to run. We need to add support for host side tools build, meanwhile disabling fixdep usage for cross arch builds. Reported-by: He Kuang <hekuang@huawei.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/r/20151013124358.GB9467@krava.brq.redhat.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-28tools build: Build fixdep helper from perf and basic libsJiri Olsa
Adding the fixdep target into the Makefile.include to ease up building of fixdep helper, that needs to be built before we dive in to the build itself. The user can invoke the fixdep target to build the helper. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-8-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-09-28tools build: Add Makefile.includeJiri Olsa
To ease up build framework code setup for users. More shared code will be added in the following patches. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1443004442-32660-2-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>