modified build system + added musl_c build

scripts/headers.sh

@@ -1,27 +1,43 @@
-#/bin/sh
+#!/bin/sh
+set -eu
 
 ARCH=$(uname -m)
-FROOT="${ARCH}-musllvm"
-LINUX_TAR=$(printf '%s' "$url" | sed -E 's/[?#].*$//' | sed -E 's!.*/!!' | grep -i linux)
+FROOT="$ARCH-musllvm"
+LINUX_TAR=$(ls ./sources/linux-*.tar.* 2>/dev/null | head -n 1 | xargs basename)
+if [ -z "$LINUX_TAR" ]; then
+        echo "ERR: No Linux tarball found in sources directory"
+        exit 1
+fi
 LINUX_SOURCE="${LINUX_TAR%%.tar*}"
 
 if command -v "clang" >/dev/null 2>&1 && command -v "lld" >/dev/null 2>&1; then
         export LLVM=1
-        export LLVM=IAS
+        export LLVM_IAS=1
 fi
 
-tar -xpf ./sources/${LINUX_TAR} ./build
+if [ -z ./build/"$LINUX_SOURCE" ]; then
+        echo "Extracting Linux tarball to ./build/"
+        tar -xpf ./sources/"$LINUX_TAR" -C ./build
+else
+        echo "Linux source already extracted."
+fi
 
-mkdir -pv ./build/${FROOT}/include
+echo "Creating target include directory"
+mkdir -pv ./build/"$FROOT"/include
 
 echo "Building Headers"
-pushd ./build/${LINUX_SOURCE}
+if [ -d ./build/"$FROOT"/include/linux ]; then
+        echo "Headers already built, skipping..."
+        exit
+fi
+
+cd ./build/"$LINUX_SOURCE"
 
 make mrproper
 make headers
-find usr/include \( -name .install -o -name ..install.cmd \) -exec rm -vf {} \;
-cp -rv usr/include/* ../${FROOT}/include/
-rm -v ../${FROOT}/include/Makefile
+find usr/include -type f ! -name '*.h' -delete
+cp -rv usr/include/* ../"$FROOT"/include/
+rm -v ../"$FROOT"/include/Makefile
 
-popd
+exit