Add wip aarch64 cross toolchain

pkgs/toolchain-aarch64/build.sh

@@ -0,0 +1,65 @@
+pkgname=toolchain-aarch64
+pkgver=12.0.0
+
+fetch() {
+	curl -L "https://github.com/llvm/llvm-project/releases/download/llvmorg-$pkgver/llvm-project-$pkgver.src.tar.xz" -o llvm-$pkgver.tar.gz
+	curl "https://musl.libc.org/releases/musl-1.2.2.tar.gz" -o musl-1.2.2.tar.gz
+	tar -xf llvm-$pkgver.tar.gz
+	tar -xf musl-1.2.2.tar.gz
+	mv llvm-project-$pkgver.src llvm-$pkgver
+	mkdir llvm-$pkgver/build-compiler-rt
+	mkdir sysroot
+}
+
+build() {
+	cd llvm-$pkgver
+	cd build-compiler-rt
+	cmake -G Ninja ../compiler-rt \
+		-DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_INSTALL_PREFIX=/usr/aarch64-linux-musl \
+		-DCMAKE_INSTALL_LIBDIR=lib \
+		-DCMAKE_C_COMPILER=clang \
+		-DCMAKE_C_COMPILER_TARGET=aarch64-linux-musl \
+		-DCMAKE_ASM_COMPILER=clang \
+		-DCMAKE_ASM_COMPILER_TARGET=aarch64-linux-musl \
+		-DCOMPILER_RT_USE_BUILTINS_LIBRARY=ON \
+		-DCOMPILER_RT_BUILD_BUILTINS=ON \
+		-DCOMPILER_RT_DEFAULT_TARGET_ONLY=OFF \
+		-DCOMPILER_RT_DEFAULT_TARGET_TRIPLE=aarch64-linux-musl \
+		-DCOMPILER_RT_INCLUDE_TESTS=OFF \
+		-DCOMPILER_RT_BUILD_SANITIZERS=OFF \
+		-DCOMPILER_RT_BUILD_XRAY=OFF \
+		-DCOMPILER_RT_BUILD_MEMPROF=OFF \
+		-DCOMPILER_RT_BUILD_PROFILE=OFF \
+		-DCOMPILER_RT_INCLUDE_TESTS=OFF \
+		-DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
+		-DCMAKE_C_FLAGS='-nostdlib' \
+		-DCMAKE_ASM_FLAGS='-nostdlib' \
+		-DCAN_TARGET_aarch64=YES \
+		-DLIBCXX_HAS_MUSL_LIBC=ON \
+		-DLLVM_CONFIG_PATH=/usr/bin/llvm-config
+
+	DESTDIR=$(pwd)/../../sysroot samu install
+	cd ../..
+
+	cd musl-1.2.2
+	CFLAGS='--sysroot=$(pwd)/../sysroot/usr/aarch64-linux-musl/ --target=aarch64-unknown-linux-musl' AR=ar LIBCC=$(pwd)/../sysroot/usr/aarch64-linux-musl/lib/linux/libclang_rt.builtins-aarch64.a ./configure \
+		--prefix=/usr/aarch64-linux-musl \
+		--target=aarch64-unknown-linux-musl \
+		--enable-wrappers=no
+
+	gmake
+	gmake install DESTDIR=$(pwd)/../sysroot/
+}
+
+package() {
+	cd $pkgname-$pkgver
+	cd build-compiler-rt
+	DESTDIR=$pkgdir samu install
+}
+
+license() {
+	cd $pkgname-$pkgver
+	cat LICENSE
+#	cat COPYING
+}