Implement the GNU basename(3) in addition to the POSIX one.
Code like perf(1) needs this.
Bug: 11860789
Change-Id: I907eb448052a7b165e4012d74303330d32328cb2
diff --git a/libc/include/string.h b/libc/include/string.h
index 643132d..0a1d653 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -25,8 +25,9 @@
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
-#ifndef _STRING_H_
-#define _STRING_H_
+
+#ifndef _STRING_H
+#define _STRING_H
#include <sys/cdefs.h>
#include <stddef.h>
@@ -92,6 +93,20 @@
extern int strcoll_l(const char *, const char *, locale_t) __purefunc;
extern size_t strxfrm_l(char* __restrict, const char* __restrict, size_t, locale_t);
+#if defined(__USE_GNU) && !defined(__bionic_using_posix_basename)
+/*
+ * glibc has a basename in <string.h> that's different to the POSIX one in <libgen.h>.
+ * It doesn't modify its argument, and in C++ it's const-correct.
+ */
+#if defined(__cplusplus)
+extern "C++" char* basename(char*) __RENAME(__gnu_basename) __nonnull((1));
+extern "C++" const char* basename(const char*) __RENAME(__gnu_basename) __nonnull((1));
+#else
+extern char* basename(const char*) __RENAME(__gnu_basename) __nonnull((1));
+#endif
+#define __bionic_using_gnu_basename
+#endif
+
#if defined(__BIONIC_FORTIFY)
__BIONIC_FORTIFY_INLINE
@@ -289,4 +304,4 @@
__END_DECLS
-#endif /* _STRING_H_ */
+#endif /* _STRING_H */