initial commit

largely based on yury's wasmception

Makefile

@@ -0,0 +1,132 @@
+# Any copyright is dedicated to the Public Domain.
+# http://creativecommons.org/publicdomain/zero/1.0/
+
+ROOT_DIR=${CURDIR}
+PREFIX?=/opt/wasi-sdk
+CLANG_VERSION=8.0.0
+
+VERSION=0.2
+DEBUG_PREFIX_MAP=-fdebug-prefix-map=$(ROOT_DIR)=wasmception://v$(VERSION)
+
+default: build
+	echo "Use -fdebug-prefix-map=$(ROOT_DIR)=wasmception://v$(VERSION)"
+
+clean:
+	rm -rf build $(PREFIX)
+
+build/llvm.BUILT:
+	mkdir -p build/llvm
+	cd build/llvm; cmake -G "Unix Makefiles" \
+		-DCMAKE_BUILD_TYPE=MinSizeRel \
+		-DCMAKE_INSTALL_PREFIX=$(PREFIX) \
+		-DLLVM_TARGETS_TO_BUILD=WebAssembly \
+		-DLLVM_DEFAULT_TARGET_TRIPLE=wasm32-unknown-wasi \
+		-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=$(ROOT_DIR)/src/llvm-project/clang \
+		-DLLVM_EXTERNAL_LLD_SOURCE_DIR=$(ROOT_DIR)/src/llvm-project/lld \
+		-DLLVM_ENABLE_PROJECTS="lld;clang" \
+		-DDEFAULT_SYSROOT=$(PREFIX)/share/sysroot \
+		$(ROOT_DIR)/src/llvm-project/llvm
+	cd build/llvm; $(MAKE) -j 8 \
+		install-clang \
+		install-lld \
+		install-llc \
+		install-llvm-ar \
+		install-llvm-ranlib \
+		install-llvm-dwarfdump \
+		install-clang-headers \
+		install-llvm-nm \
+		install-llvm-size \
+		llvm-config
+	touch build/llvm.BUILT
+
+build/reference-sysroot.BUILT: build/llvm.BUILT
+	make -C $(ROOT_DIR)/src/reference-sysroot \
+		WASM_CC=$(PREFIX)/bin/clang \
+		SYSROOT=$(PREFIX)/share/sysroot
+	touch build/reference-sysroot.BUILT
+
+build/compiler-rt.BUILT: build/llvm.BUILT
+	mkdir -p build/compiler-rt
+	cd build/compiler-rt; cmake -G "Unix Makefiles" \
+		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
+		-DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/wasmi-sdk.cmake \
+		-DCOMPILER_RT_BAREMETAL_BUILD=On \
+		-DCOMPILER_RT_BUILD_XRAY=OFF \
+		-DCOMPILER_RT_INCLUDE_TESTS=OFF \
+		-DCOMPILER_RT_ENABLE_IOS=OFF \
+		-DCOMPILER_RT_DEFAULT_TARGET_ONLY=On \
+		-DWASM_SDK_PREFIX=$(PREFIX) \
+		-DCMAKE_C_FLAGS="-O1 $(DEBUG_PREFIX_MAP)" \
+		-DLLVM_CONFIG_PATH=$(ROOT_DIR)/build/llvm/bin/llvm-config \
+		-DCOMPILER_RT_OS_DIR=wasi \
+		-DCMAKE_INSTALL_PREFIX=$(PREFIX)/lib/clang/$(CLANG_VERSION)/ \
+		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
+		$(ROOT_DIR)/src/llvm-project/compiler-rt/lib/builtins
+	cd build/compiler-rt; make -j 8 install
+	cp -R $(ROOT_DIR)/build/llvm/lib/clang $(PREFIX)/lib/
+	touch build/compiler-rt.BUILT
+
+build/libcxx.BUILT: build/llvm.BUILT build/compiler-rt.BUILT build/reference-sysroot.BUILT
+	mkdir -p build/libcxx
+	cd build/libcxx; cmake -G "Unix Makefiles" \
+		-DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/wasi-sdk.cmake \
+		-DLLVM_CONFIG_PATH=$(ROOT_DIR)/build/llvm/bin/llvm-config \
+		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
+		-DLIBCXX_HAS_PTHREAD_API:BOOL=ON \
+		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
+		-DLIBCXX_ENABLE_SHARED:BOOL=OFF \
+		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY:BOOL=OFF \
+		-DLIBCXX_ENABLE_EXCEPTIONS:BOOL=OFF \
+		-DLIBCXX_CXX_ABI=libcxxabi \
+		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=$(ROOT_DIR)/src/llvm-project/libcxxabi/include \
+		-DLIBCXX_HAS_MUSL_LIBC:BOOL=ON \
+		-DLIBCXX_ABI_VERSION=2 \
+		-DWASM_SDK_PREFIX=$(PREFIX) \
+		-DCMAKE_C_FLAGS="$(DEBUG_PREFIX_MAP)" \
+		-DCMAKE_CXX_FLAGS="$(DEBUG_PREFIX_MAP)" \
+		--debug-trycompile \
+		$(ROOT_DIR)/src/llvm-project/libcxx
+	cd build/libcxx; make -j 8 install
+	# libc++abi.a doesn't do a multiarch install, so fix it up.
+	mv $(PREFIX)/share/sysroot/lib/libc++.a $(PREFIX)/share/sysroot/lib/wasm32-wasi/
+	touch build/libcxx.BUILT
+
+build/libcxxabi.BUILT: build/libcxx.BUILT build/llvm.BUILT
+	mkdir -p build/libcxxabi
+	cd build/libcxxabi; cmake -G "Unix Makefiles" \
+		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
+		-DCMAKE_CXX_COMPILER_WORKS=ON \
+		-DCMAKE_C_COMPILER_WORKS=ON \
+		-DLIBCXXABI_ENABLE_EXCEPTIONS:BOOL=OFF \
+		-DLIBCXXABI_ENABLE_SHARED:BOOL=OFF \
+		-DLIBCXXABI_HAS_PTHREAD_API:BOOL=ON \
+		-DCXX_SUPPORTS_CXX11=ON \
+		-DLLVM_COMPILER_CHECKED=ON \
+		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
+		-DLIBCXXABI_LIBCXX_PATH=$(ROOT_DIR)/src/llvm-project/libcxx \
+		-DLIBCXXABI_LIBCXX_INCLUDES=$(PREFIX)/share/sysroot/include/c++/v1 \
+		-DLLVM_CONFIG_PATH=$(ROOT_DIR)/build/llvm/bin/llvm-config \
+		-DCMAKE_TOOLCHAIN_FILE=$(ROOT_DIR)/wasi-sdk.cmake \
+		-DWASM_SDK_PREFIX=$(PREFIX) \
+		-DCMAKE_C_FLAGS="$(DEBUG_PREFIX_MAP)" \
+		-DCMAKE_CXX_FLAGS="$(DEBUG_PREFIX_MAP)" \
+		-DUNIX:BOOL=ON \
+		--debug-trycompile \
+		$(ROOT_DIR)/src/llvm-project/libcxxabi
+	cd build/libcxxabi; make -j 8 install
+	# libc++abi.a doesn't do a multiarch install, so fix it up.
+	mv $(PREFIX)/share/sysroot/lib/libc++abi.a $(PREFIX)/share/sysroot/lib/wasm32-wasi/
+	touch build/libcxxabi.BUILT
+
+build: build/llvm.BUILT build/reference-sysroot.BUILT build/compiler-rt.BUILT build/libcxxabi.BUILT build/libcxx.BUILT
+
+strip: build/llvm.BUILT
+	cd $(PREFIX)/bin; strip clang-8 llc lld llvm-ar
+
+package: build/package.BUILT
+
+build/package.BUILT: build
+	./package.sh
+	touch build/package.BUILT
+
+.PHONY: default clean build strip package

package.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+
+if [ -n "$1" ]; then
+	export VERSION="$1"
+else
+	export VERSION=`./version.sh`
+fi
+
+rm -rf pkg
+mkdir -p pkg/opt
+mkdir pkg/DEBIAN
+sed -e s/VERSION/$VERSION/ wasi-sdk.control > pkg/DEBIAN/control
+cp -R /opt/wasi-sdk pkg/opt/
+dpkg-deb -b pkg wasi-sdk_$VERSION\_amd64.deb
+rm -rf pkg

version.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+set -e
+GIT_DESCR=$(git describe --long --candidates=999 --match='wasi-sdk-*' --dirty='+m' --abbrev=12)
+GIT_PACKAGE_VERSION=$(echo $GIT_DESCR | perl -ne 'if(/^wasi-sdk-(\d+)-(\d+)-g([0-9a-f]{7,12})([+]m)?$/) { print "$1.$2g$3$4"; exit } else { print "could not parse git description"; exit 1 }';)
+echo $GIT_PACKAGE_VERSION

wasi-sdk.control

@@ -0,0 +1,6 @@
+Package: wasi-sdk
+Version: VERSION
+Architecture: amd64
+Priority: optional
+Description: Clang toolchain with wasm32-wasi default target, and the wasi sysroot
+Maintainer: Pat Hickey <phickey@fastly.com>

wask-sdk.cmake

@@ -0,0 +1,33 @@
+# Cmake toolchain description file for the Makefile
+
+# This is arbitrary, AFAIK, for now.
+cmake_minimum_required(VERSION 3.4.0)
+
+set(CMAKE_SYSTEM_NAME Wasm)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR wasm32)
+set(triple wasm32-unknown-wasi)
+
+set(CMAKE_C_COMPILER ${WASM_SDK_PREFIX}/bin/clang)
+set(CMAKE_CXX_COMPILER ${WASM_SDK_PREFIX}/bin/clang++)
+set(CMAKE_AR ${WASM_SDK_PREFIX}/bin/llvm-ar CACHE STRING "wasi-sdk build")
+set(CMAKE_RANLIB ${WASM_SDK_PREFIX}/bin/llvm-ranlib CACHE STRING "wasi-sdk build")
+set(CMAKE_C_COMPILER_TARGET ${triple} CACHE STRING "wasi-sdk build")
+set(CMAKE_CXX_COMPILER_TARGET ${triple} CACHE STRING "wasi-sdk build")
+set(CMAKE_C_FLAGS "-v" CACHE STRING "wasi-sdk build")
+set(CMAKE_CXX_FLAGS "-v -std=c++11" CACHE STRING "wasi-sdk build")
+set(CMAKE_EXE_LINKER_FLAGS "-Wl,--no-threads" CACHE STRING "wasi-sdk build")
+
+set(CMAKE_SYSROOT ${WASM_SDK_PREFIX}/share/sysroot CACHE STRING "wasi-sdk build")
+set(CMAKE_STAGING_PREFIX ${WASM_SDK_PREFIX}/share/sysroot CACHE STRING "wasi-sdk build")
+
+# Don't look in the sysroot for executables to run during the build
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+# Only look in the sysroot (not in the host paths) for the rest
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+
+# Some other hacks
+set(CMAKE_C_COMPILER_WORKS ON)
+set(CMAKE_CXX_COMPILER_WORKS ON)