• Arnaldo Carvalho de Melo's avatar
    perf bench futex: Fix build on musl + clang · a0f213e1
    Arnaldo Carvalho de Melo authored
    When building with clang on a musl libc system, Alpine Linux, we end up
    hitting a problem where memset() is used but its prototype is not
    present, add it to avoid this:
    
      bench/futex-wake.c:99:3: error: implicitly declaring library function 'memset' with type 'void *(void *, int, unsigned long)'
            [-Werror,-Wimplicit-function-declaration]
                      CPU_ZERO(&cpu);
                      ^
      /usr/include/sched.h:127:23: note: expanded from macro 'CPU_ZERO'
      #define CPU_ZERO(set) CPU_ZERO_S(sizeof(cpu_set_t),set)
                            ^
      /usr/include/sched.h:110:30: note: expanded from macro 'CPU_ZERO_S'
      #define CPU_ZERO_S(size,set) memset(set,0,size)
                                   ^
      bench/futex-wake.c:99:3: note: include the header <string.h> or explicitly provide a declaration for 'memset'
    
    Found while updating my test build containers to build perf with clang in more
    systems.
    
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Davidlohr Bueso <dave@stgolabs.net>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: http://lkml.kernel.org/n/tip-jh10vaz2r98zl6gm5iau8prr@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    a0f213e1
futex-hash.c 5.84 KB