musl: add initial pieces for a musl specific shared config.cache

base/musl/parse-config

@@ -0,0 +1,19 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../musl/parse-config
+# Copyright (C) 2014 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+if [ "$SDECFG_LIBC" == "musl" ]; then
+	if atstage cross; then
+		var_append configcachefile ' ' "$base/package/*/musl/share/config.cache"
+	fi
+fi

base/musl/share/config.cache

@@ -0,0 +1,6 @@
+# musl libc specific config.cache entries for cross compiling
+
+# GNU libc compatible malloc, realloc, calloc
+ac_cv_func_malloc_0_nonnull=yes
+ac_cv_func_realloc_0_nonnull=yes
+ac_cv_func_calloc_0_nonnull=yes