document riscv64 support in INSTALL document

[android-x86/external-musl-libc.git] / include / errno.h

diff --git a/include/errno.h b/include/errno.h
index 93f5f6e..0361b33 100644 (file)
--- a/include/errno.h
+++ b/include/errno.h
@@ -9,6 +9,9 @@ extern "C" {
 
 #include <bits/errno.h>
 
+#ifdef __GNUC__
+__attribute__((const))
+#endif
 int *__errno_location(void);
 #define errno (*__errno_location())