SPDX-FileCopyrightText: 2021 Andrius Štikonas <andrius@stikonas.eu>
SPDX-License-Identifier: GPL-3.0-or-later

Add support for *-linux-musl triplet.

--- libstdc++-v3/configure.host 2021-07-07 10:00:23.934848223 +0100
+++ libstdc++-v3/configure.host 2021-07-07 10:00:36.295195348 +0100
@@ -242,6 +242,9 @@
   freebsd*)
     os_include_dir="os/bsd/freebsd"
     ;;
+  linux-musl*)
+    os_include_dir="os/generic"
+    ;;
   gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
     if [ "$uclibc" = "yes" ]; then
       os_include_dir="os/uclibc"