tools/perf: Turn strlcpy() into a __weak function

The strlcpy() feature check slows every build unnecessarily - so make it
a __weak function so it does not have to be auto-detected.

If the libc (or any other library) has an strlcpy() implementation it will
be used - otherwise our fallback is active.

Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-zjbrcupapu08ePsyYhhhxiwk@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 7 insertions, 3 deletions

diff --git a/tools/perf/util/path.c b/tools/perf/util/path.c
index f3958743b743..5d13cb45b317 100644
--- a/tools/perf/util/path.c
+++ b/tools/perf/util/path.c
@@ -22,19 +22,23 @@ static const char *get_perf_dir(void)
         return ".";
 }
 
-#ifndef HAVE_STRLCPY_SUPPORT
-size_t strlcpy(char *dest, const char *src, size_t size)
+/*
+ * If libc has strlcpy() then that version will override this
+ * implementation:
+ */
+size_t __weak strlcpy(char *dest, const char *src, size_t size)
 {
         size_t ret = strlen(src);
 
         if (size) {
                 size_t len = (ret >= size) ? size - 1 : ret;
+
                 memcpy(dest, src, len);
                 dest[len] = '\0';
         }
+
         return ret;
 }
-#endif
 
 static char *get_pathname(void)
 {