musl-cross-make/patches/gcc-6.5.0/0001-linux_libc_has_function.diff

diff --git a/gcc/config/linux.c b/gcc/config/linux.c
index 250296b..16c3768 100644
--- a/gcc/config/linux.c
+++ b/gcc/config/linux.c
@@ -26,7 +26,7 @@ along with GCC; see the file COPYING3.  If not see
 bool
 linux_libc_has_function (enum function_class fn_class)
 {
-  if (OPTION_GLIBC)
+  if (OPTION_GLIBC || OPTION_MUSL)
     return true;
   if (OPTION_BIONIC)
     if (fn_class == function_c94