scripts: ext-toolchain: add support for musl

Openwrt now supports only glibc and musl. Add support for musl and
rework the libc check to handle the new config flags and correctly
compile package basend on that.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
(cherry picked from commit 7be01fe13b4517e5edb8a4818f437d60144cdcb4)

diff --git a/scripts/ext-toolchain.sh b/scripts/ext-toolchain.sh
index 1f8eca30769a81cf599c439c8466220752f44801..fe1024c18ec800a903a32aa64471065385032768 100755 (executable)
--- a/scripts/ext-toolchain.sh
+++ b/scripts/ext-toolchain.sh
@@ -369,8 +369,18 @@ print_config() {
        echo "CONFIG_TOOLCHAIN_PREFIX=\"$prefix\"" >> "$config"
        echo "CONFIG_TARGET_NAME=\"$target\"" >> "$config"
 
-       if [ "$LIBC_TYPE" != glibc ]; then
-               echo "CONFIG_TOOLCHAIN_LIBC=\"$LIBC_TYPE\"" >> "$config"
+       if [ -f "$config" ]; then
+               sed -i '/CONFIG_EXTERNAL_TOOLCHAIN_LIBC_USE_MUSL/d' "$config"
+               sed -i '/CONFIG_EXTERNAL_TOOLCHAIN_LIBC_USE_GLIBC/d' "$config"
+       fi
+
+       if [ "$LIBC_TYPE" == glibc ]; then
+               echo "CONFIG_EXTERNAL_TOOLCHAIN_LIBC_USE_GLIBC=y" >> "$config"
+       elif [ "$LIBC_TYPE" == musl ]; then
+               echo "CONFIG_EXTERNAL_TOOLCHAIN_LIBC_USE_MUSL=y" >> "$config"
+       else
+               echo "Can't detect LIBC type. Aborting!" >&2
+               return 1
        fi
 
        local lib