feat(cross): clang

builder/src/desc.rs

@@ -41,7 +41,10 @@ pub enum SourceInner {
 		branch: Option<String>,
 	},
 	/// Copy from a local path to a tarball or directory.
-	Local(PathBuf),
+	Local {
+		/// The local path.
+		path: PathBuf,
+	},
 }
 
 /// Description of sources files, where to find them and where to place them for building.
@@ -61,7 +64,7 @@ impl Source {
 	pub async fn fetch(&self, build_dir: &Path) -> Result<()> {
 		let dest_path = common::util::concat_paths(build_dir, &self.location);
 		match &self.inner {
-			SourceInner::Local(path) => {
+			SourceInner::Local { path } => {
 				let metadata = fs::metadata(path)?;
 				if metadata.is_dir() {
 					common::util::recursive_copy(path, &dest_path)?;

cross/build.sh

@@ -10,8 +10,8 @@ fi
 # Prepare
 mkdir -p toolchain/repo
 PATH="$(pwd)/../target/release:$PATH"
-export SYSROOT="$(pwd)/toolchain/"
-export LOCAL_REPO="$(pwd)/toolchain/repo/"
+export SYSROOT="toolchain/"
+export LOCAL_REPO="toolchain/repo/"
 
 # binutils
 blimp-builder desc/binutils toolchain/repo/
@@ -23,4 +23,6 @@ HOST="$TARGET" blimp-builder desc/musl toolchain/repo/
 unset CC LD CFLAGS LDFLAGS RUSTFLAGS
 yes | blimp install musl
 
-# TODO clang
+# clang
+blimp-builder desc/clang toolchain/repo/
+yes | blimp install clang

cross/desc/clang/build-hook

@@ -0,0 +1,73 @@
+#!/bin/sh
+
+set -e
+
+mv llvm-* llvm
+mkdir {clang,libc++,compiler-rt}-build
+
+# Build clang
+cd clang-build
+cmake \
+  ../llvm/llvm \
+  -G Ninja \
+  -DLLVM_ENABLE_PROJECTS="lld;clang" \
+  -DCMAKE_BUILD_TYPE=Release \
+  -DLLVM_PARALLEL_COMPILE_JOBS=$JOBS \
+  -DLLVM_PARALLEL_LINK_JOBS=1 \
+  -DLLVM_TARGETS_TO_BUILD=X86 \
+  -DCMAKE_INSTALL_PREFIX="$SYSROOT"
+ninja -j$JOBS
+ninja -j$JOBS install
+cd ..
+
+# Build libstdc++
+cd ../libc++-build
+cmake
+  ../llvm
+  -G Ninja \
+  -S runtimes \
+  -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" \
+  -DLIBCXX_USE_COMPILER_RT=OFF \
+  -DCMAKE_C_COMPILER="$SYSROOT/bin/clang" \
+  -DCMAKE_CXX_COMPILER="$SYSROOT/bin/clang++" \
+  -DCMAKE_ASM_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_C_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_CXX_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_CXX_FLAGS="-nostdlib++" \
+  -DCMAKE_INSTALL_PREFIX=$SYSROOT
+ninja -j$JOBS cxx cxxabi unwind
+ninja install-cxx install-cxxabi install-unwind
+cd ..
+
+# Build compiler-rt
+cd compiler-rt-build
+cmake \
+  ../llvm/compiler-rt \
+  -G Ninja \
+  -DCMAKE_C_COMPILER="$SYSROOT/bin/clang" \
+  -DCMAKE_CXX_COMPILER="$SYSROOT/bin/clang++" \
+  -DLLVM_CONFIG_PATH="$SYSROOT/bin/llvm-config" \
+  -DCMAKE_ASM_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_C_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_CXX_COMPILER_TARGET="$TARGET" \
+  -DCMAKE_CXX_FLAGS="-stdlib=libc++" \
+  -DCOMPILER_RT_BAREMETAL_BUILD=ON \
+  -DCOMPILER_RT_BUILD_BUILTINS=ON \
+  -DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
+  -DCOMPILER_RT_BUILD_MEMPROF=OFF \
+  -DCOMPILER_RT_BUILD_PROFILE=OFF \
+  -DCOMPILER_RT_BUILD_SANITIZERS=OFF \
+  -DCOMPILER_RT_BUILD_XRAY=OFF \
+  -DCOMPILER_RT_BUILD_ORC=ON \
+  -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON \
+  -DCOMPILER_RT_BUILTINS_ENABLE_PIC=OFF \
+  -DCMAKE_INSTALL_PREFIX=$SYSROOT/lib/clang/13.0.1/
+ninja -j$JOBS
+ninja -j$JOBS install
+cd ..
+
+# Patch
+ln -fsv ../../lib/clang/13.0.1/lib/linux/clang_rt.crtbegin-i386.o $SYSROOT/usr/lib/crtbegin.o
+ln -fsv crtbegin.o $SYSROOT/usr/lib/crtbeginS.o
+ln -fsv crtbegin.o $SYSROOT/usr/lib/crtbeginT.o
+ln -fsv ../../lib/clang/13.0.1/lib/linux/clang_rt.crtend-i386.o $SYSROOT/usr/lib/crtend.o

cross/desc/clang/package.json

@@ -0,0 +1,17 @@
+{
+  "sources": [
+    {
+      "location": "/",
+      "url": "https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-18.1.4.tar.gz"
+    }
+  ],
+  "package": {
+    "name": "clang",
+    "version": "18.1.4",
+
+    "description": "The Clang project provides a language front-end and tooling infrastructure for languages in the C language family (C, C++, Objective C/C++, OpenCL, CUDA, and RenderScript) for the LLVM project.",
+
+    "build_deps": [],
+    "run_deps": []
+  }
+}