Better backwards compatibility for stat64.
Caused problems for some Google source switching to unified headers
because the legacy headers just used #define instead.
Bug: http://b/73210428
Test: builds
Change-Id: If8a36f284031e57af419903610029a8c34a23d91
diff --git a/libc/include/sys/cdefs.h b/libc/include/sys/cdefs.h
index 27952b9..26dd9a2 100644
--- a/libc/include/sys/cdefs.h
+++ b/libc/include/sys/cdefs.h
@@ -245,6 +245,16 @@
#define __RENAME_LDBL(rewrite,rewrite_api_level,regular_api_level) __RENAME(rewrite) __INTRODUCED_IN(rewrite_api_level)
#endif
+/*
+ * On all architectures, `struct stat` == `struct stat64`, but LP32 didn't gain the *64 functions
+ * until API level 21.
+ */
+#if defined(__LP64__) || defined(__BIONIC_LP32_USE_STAT64)
+#define __RENAME_STAT64(rewrite,rewrite_api_level,regular_api_level) __INTRODUCED_IN(regular_api_level)
+#else
+#define __RENAME_STAT64(rewrite,rewrite_api_level,regular_api_level) __RENAME(rewrite) __INTRODUCED_IN(rewrite_api_level)
+#endif
+
/* glibc compatibility. */
#if defined(__LP64__)
#define __WORDSIZE 64