llvm: changes for latest wasi-libc and wasi-sdk

faasm · csegarragonz · Mar 12, 2024 · Feb 9, 2024 · Feb 9, 2024 · Feb 12, 2024
commit 2aa96617e17e3d2a58112dc31b4e2e910ffbf48b
diff --git a/LLVM.makefile b/LLVM.makefile
@@ -1,13 +1,11 @@
 # Project directories
 LLVM_PROJ_DIR=${FAASM_LLVM_DIR}
 
-TOOLCHAIN_DIR=${FAASM_CPP_PROJ_ROOT}
-TOOLCHAIN_FILE=$(TOOLCHAIN_DIR)/WasiToolchain.cmake
-
 # Install dirs
 FAASM_LOCAL_DIR=${FAASM_LOCAL_DIR_ENV}
-PREFIX=$(FAASM_LOCAL_DIR)/toolchain
 FAASM_SYSROOT=$(FAASM_LOCAL_DIR)/llvm-sysroot
+FAASM_TOOLCHAIN_DIR=$(FAASM_LOCAL_DIR)/toolchain
+FAASM_TOOLCHAIN_FILE=$(FAASM_TOOLCHAIN_DIR)/tools/WasiToolchain.cmake
 
 CLANG_VERSION=${FAASM_LLVM_VERSION}
 CLANG_VERSION_MAJOR := $(shell echo $(CLANG_VERSION) | cut -f1 -d.)
@@ -27,7 +25,7 @@ default: build
 
 .PHONY: clean-libc
 clean-libc:
-	rm -rf $(BUILD_DIR)/libc.BUILT $(WASI_LIBC_DIR)/build
+	rm -rf $(BUILD_DIR)/wasi-libc.BUILT $(WASI_LIBC_DIR)/build
 
 .PHONY: very-clean-libc
 very-clean-libc: clean-libc
@@ -38,117 +36,117 @@ very-clean-libc: clean-libc
 clean-libs: clean-libc
 	rm -rf $(BUILD_DIR)/compiler-rt $(BUILD_DIR)/compiler-rt.BUILT
 	rm -rf $(BUILD_DIR)/libcxx $(BUILD_DIR)/libcxx.BUILT
-	rm -rf $(BUILD_DIR)/libcxxabi $(BUILD_DIR)/libcxxabi.BUILT
 
 .PHONY: clean-all
 clean-all:
-	rm -rf $(BUILD_DIR) $(PREFIX)
+	rm -rf $(BUILD_DIR) $(FAASM_TOOLCHAIN_DIR)/bin $(FAASM_TOOLCHAIN_DIR)/libs $(FAASM_SYSROOT)
 
 $(BUILD_DIR)/llvm.BUILT:
 	mkdir -p $(BUILD_DIR)/llvm
 	cd $(BUILD_DIR)/llvm; cmake -G Ninja \
-		-DCMAKE_C_COMPILER=/usr/bin/clang-$(CLANG_VERSION_MAJOR) \
-		-DCMAKE_CXX_COMPILER=/usr/bin/clang++-$(CLANG_VERSION_MAJOR) \
 		-DCMAKE_BUILD_TYPE=MinSizeRel \
-		-DCMAKE_INSTALL_PREFIX=$(PREFIX) \
+		-DLLVM_ENABLE_TERMINFO=OFF \
+		-DLLVM_ENABLE_ZLIB=OFF \
+		-DLLVM_ENABLE_ZSTD=OFF \
+		-DLLVM_STATIC_LINK_CXX_STDLIB=ON \
+		-DLLVM_HAVE_LIBXAR=OFF \
+		-DCMAKE_INSTALL_PREFIX=${FAASM_TOOLCHAIN_DIR} \
+		-DLLVM_INCLUDE_TESTS=OFF \
+		-DLLVM_INCLUDE_UTILS=OFF \
+		-DLLVM_INCLUDE_BENCHMARKS=OFF \
+		-DLLVM_INCLUDE_EXAMPLES=OFF \
 		-DLLVM_TARGETS_TO_BUILD=WebAssembly \
 		-DLLVM_DEFAULT_TARGET_TRIPLE=wasm32-wasi \
-		-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=$(LLVM_PROJ_DIR)/clang \
-		-DLLVM_EXTERNAL_OPENMP_SOURCE_DIR=$(LLVM_PROJ_DIR)/openmp \
-		-DLLVM_EXTERNAL_LLD_SOURCE_DIR=$(LLVM_PROJ_DIR)/lld \
 		-DLLVM_ENABLE_PROJECTS="lld;clang;openmp" \
 		-DDEFAULT_SYSROOT=$(FAASM_SYSROOT) \
+		-DLLVM_INSTALL_BINUTILS_SYMLINKS=TRUE \
+		-DLLVM_ENABLE_LIBXML2=OFF \
 		$(LLVM_PROJ_DIR)/llvm
 	ninja -v -C $(BUILD_DIR)/llvm \
 		install-clang \
 		install-clang-resource-headers \
 		install-lld \
-		install-llc \
-		install-llvm-ar \
+		install-llvm-mc \
 		install-llvm-ranlib \
+		install-llvm-strip \
 		install-llvm-dwarfdump \
-		install-llvm-nm \
-		install-llvm-size \
-		install-llvm-config
+		install-clang-resource-headers \
+		install-ar \
+		install-ranlib \
+		install-strip \
+		install-nm \
+		install-size \
+		install-strings \
+		install-objdump \
+		install-objcopy \
+		install-c++filt \
+		llvm-config
 	touch $(BUILD_DIR)/llvm.BUILT
 
 # WASI libc
-$(BUILD_DIR)/libc.BUILT: $(BUILD_DIR)/llvm.BUILT
-	mkdir -p $(WASI_LIBC_DIR)/build
-	cd $(WASI_LIBC_DIR); $(MAKE) \
+$(BUILD_DIR)/wasi-libc.BUILT: $(BUILD_DIR)/compiler-rt.BUILT
+	mkdir -p $(WASI_LIBC_DIR)/build/wasm32-wasi
+	$(MAKE) -C ${WASI_LIBC_DIR} \
+		CC=$(FAASM_TOOLCHAIN_DIR)/bin/clang \
+		AR=$(FAASM_TOOLCHAIN_DIR)/bin/llvm-ar \
+		NM=$(FAASM_TOOLCHAIN_DIR)/bin/llvm-nm \
+		SYSROOT=$(FAASM_SYSROOT) \
 		THREAD_MODEL=faasm \
-		CC=$(PREFIX)/bin/clang \
-		AR=$(PREFIX)/bin/llvm-ar \
-		NM=$(PREFIX)/bin/llvm-nm \
-		SYSROOT=$(FAASM_SYSROOT)
-	touch $(BUILD_DIR)/libc.BUILT
+		default
+	touch $(BUILD_DIR)/wasi-libc.BUILT
 
-$(BUILD_DIR)/compiler-rt.BUILT: $(BUILD_DIR)/libc.BUILT
+$(BUILD_DIR)/compiler-rt.BUILT: $(BUILD_DIR)/llvm.BUILT
 	mkdir -p $(BUILD_DIR)/compiler-rt
 	cd $(BUILD_DIR)/compiler-rt; cmake -G Ninja \
+		-DCMAKE_SYSROOT=${FAASM_SYSROOT} \
+		-DCMAKE_C_COMPILER_WORKS=ON \
+		-DCMAKE_CXX_COMPILER_WORKS=ON \
 		-DCMAKE_BUILD_TYPE=RelWithDebInfo \
-		-DCMAKE_TOOLCHAIN_FILE=$(TOOLCHAIN_FILE) \
+		-DCMAKE_TOOLCHAIN_FILE=${FAASM_TOOLCHAIN_FILE} \
 		-DCOMPILER_RT_BAREMETAL_BUILD=ON \
 		-DCOMPILER_RT_BUILD_XRAY=OFF \
 		-DCOMPILER_RT_INCLUDE_TESTS=OFF \
 		-DCOMPILER_RT_HAS_FPIC_FLAG=OFF \
 		-DCOMPILER_RT_ENABLE_IOS=OFF \
 		-DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON \
 		-DLLVM_CONFIG_PATH=$(LLVM_CONFIG) \
-		-DCMAKE_INSTALL_PREFIX=$(PREFIX)/lib/clang/$(CLANG_VERSION)/ \
+		-DCMAKE_INSTALL_PREFIX=$(FAASM_TOOLCHAIN_DIR)/lib/clang/$(CLANG_VERSION)/ \
 		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
 		-DCOMPILER_RT_OS_DIR=wasi \
 		$(LLVM_PROJ_DIR)/compiler-rt/lib/builtins
 	ninja -v -C $(BUILD_DIR)/compiler-rt install
-	cp -R $(BUILD_DIR)/llvm/lib/clang $(PREFIX)/lib/
+	cp -R $(BUILD_DIR)/llvm/lib/clang $(FAASM_TOOLCHAIN_DIR)/lib/
 	touch $(BUILD_DIR)/compiler-rt.BUILT
 
-$(BUILD_DIR)/libcxx.BUILT: $(BUILD_DIR)/compiler-rt.BUILT
+$(BUILD_DIR)/libcxx.BUILT: $(BUILD_DIR)/llvm.BUILT ${BUILD_DIR}/wasi-libc.BUILT
 	mkdir -p $(BUILD_DIR)/libcxx
 	cd $(BUILD_DIR)/libcxx; cmake -G Ninja \
-		-DCMAKE_TOOLCHAIN_FILE=$(TOOLCHAIN_FILE) \
-		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
+		-DCMAKE_C_COMPILER_WORKS=ON \
 		-DCMAKE_CXX_COMPILER_WORKS=ON \
-    	-DCMAKE_C_COMPILER_WORKS=ON \
-		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
-		-DCMAKE_INSTALL_PREFIX=$(FAASM_SYSROOT) \
-		-DLLVM_COMPILER_CHECKED=ON \
+		-DCMAKE_AR=$(FAASM_TOOLCHAIN_DIR)/bin/ar \
+		-DCMAKE_TOOLCHAIN_FILE=$(FAASM_TOOLCHAIN_FILE) \
+		-DCMAKE_STAGING_PREFIX=$(FAASM_SYSROOT) \
+		-DCMAKE_POSITION_INDEPENDENT_CODE=OFF \
 		-DLLVM_CONFIG_PATH=$(LLVM_CONFIG) \
-		-DLIBCXX_HAVE_CXX_ATOMICS_WITHOUT_LIB=ON \
-		-DLIBCXX_USE_COMPILER_RT=ON \
+		-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \
+		-DCXX_SUPPORTS_CXX11=ON \
 		-DLIBCXX_ENABLE_THREADS:BOOL=ON \
 		-DLIBCXX_HAS_PTHREAD_API:BOOL=ON \
 		-DLIBCXX_HAS_EXTERNAL_THREAD_API:BOOL=OFF \
 		-DLIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY:BOOL=OFF \
 		-DLIBCXX_HAS_WIN32_THREAD_API:BOOL=OFF \
+		-DLLVM_COMPILER_CHECKED=ON \
+		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
 		-DLIBCXX_ENABLE_SHARED:BOOL=OFF \
-		-DLIBCXX_ENABLE_PIC:BOOL=OFF \
 		-DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY:BOOL=OFF \
 		-DLIBCXX_ENABLE_EXCEPTIONS:BOOL=OFF \
-		-DLIBCXX_ENABLE_FILESYSTEM:BOOL=OFF \
+		-DLIBCXX_ENABLE_FILESYSTEM:BOOL=ON \
+		-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT:BOOL=OFF \
+		-DLIBCXX_USE_COMPILER_RT=ON \
 		-DLIBCXX_CXX_ABI=libcxxabi \
 		-DLIBCXX_CXX_ABI_INCLUDE_PATHS=$(LLVM_PROJ_DIR)/libcxxabi/include \
 		-DLIBCXX_HAS_MUSL_LIBC:BOOL=ON \
 		-DLIBCXX_ABI_VERSION=2 \
-		-DLIBCXX_LIBDIR_SUFFIX=/wasm32-wasi \
-		--debug-trycompile \
-		$(LLVM_PROJ_DIR)/libcxx
-	ninja -v -C $(BUILD_DIR)/libcxx install
-	touch $(BUILD_DIR)/libcxx.BUILT
-
-$(BUILD_DIR)/libcxxabi.BUILT: $(BUILD_DIR)/libcxx.BUILT
-	mkdir -p $(BUILD_DIR)/libcxxabi
-	cd $(BUILD_DIR)/libcxxabi; cmake -G Ninja \
-		-DCMAKE_BUILD_TYPE=RelWithDebugInfo \
-		-DCMAKE_C_FLAGS="-I$(FAASM_SYSROOT)/include" \
-		-DCMAKE_CXX_FLAGS="-I$(FAASM_SYSROOT)/include/c++/v1" \
-		-DCMAKE_TOOLCHAIN_FILE=$(TOOLCHAIN_FILE) \
-	        -DLLVM_CONFIG_PATH=$(LLVM_CONFIG) \
-		-DCMAKE_CXX_COMPILER_WORKS=ON \
-		-DCMAKE_C_COMPILER_WORKS=ON \
-		-DCMAKE_INSTALL_PREFIX=$(FAASM_SYSROOT) \
-		-DLLVM_COMPILER_CHECKED=ON \
-                -DLIBCXXABI_USE_COMPILER_RT=ON \
 		-DLIBCXXABI_ENABLE_EXCEPTIONS:BOOL=OFF \
 		-DLIBCXXABI_ENABLE_SHARED:BOOL=OFF \
 		-DLIBCXXABI_SILENT_TERMINATE:BOOL=ON \
@@ -157,28 +155,29 @@ $(BUILD_DIR)/libcxxabi.BUILT: $(BUILD_DIR)/libcxx.BUILT
 		-DLIBCXXABI_HAS_EXTERNAL_THREAD_API:BOOL=OFF \
 		-DLIBCXXABI_BUILD_EXTERNAL_THREAD_LIBRARY:BOOL=OFF \
 		-DLIBCXXABI_HAS_WIN32_THREAD_API:BOOL=OFF \
-		-DLIBCXXABI_ENABLE_PIC:BOOL=OFF \
-		-DLIBCXXABI_LIBCXX_PATH=$(LLVM_PROJ_DIR)/libcxx \
-		-DLIBCXXABI_LIBCXX_INCLUDES=$(FAASM_SYSROOT)/include/c++/v1 \
+		-DLIBCXX_ENABLE_PIC:BOOL=OFF \
 		-DUNIX:BOOL=ON \
-                -DLIBCXXABI_LIBDIR_SUFFIX=/wasm32-wasi \
 		--debug-trycompile \
-		$(LLVM_PROJ_DIR)/libcxxabi
-	ninja -v -C $(BUILD_DIR)/libcxxabi install
-	touch $(BUILD_DIR)/libcxxabi.BUILT
+		-DCMAKE_SYSROOT=${FAASM_SYSROOT} \
+		-DCMAKE_C_FLAGS="-I$(FAASM_SYSROOT)/include --target=wasm32-wasi" \
+		-DCMAKE_CXX_FLAGS="-I$(FAASM_SYSROOT)/include -I$(FAASM_SYSROOT)/include/c++/v1 --target=wasm32-wasi" \
+		-DLIBCXX_LIBDIR_SUFFIX=/wasm32-wasi \
+		-DLIBCXXABI_LIBDIR_SUFFIX=/wasm32-wasi \
+		-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi" \
+		$(LLVM_PROJ_DIR)/runtimes
+	ninja -v -C $(BUILD_DIR)/libcxx install
+	touch $(BUILD_DIR)/libcxx.BUILT
 
 .PHONY: extras
-extras: $(BUILD_DIR)/libcxxabi.BUILT
-	cp $(TOOLCHAIN_DIR)/sysroot_extras/* $(FAASM_SYSROOT)/lib/wasm32-wasi/
+extras: $(BUILD_DIR)/libcxx.BUILT
+	cp $(FAASM_CPP_PROJ_ROOT)/sysroot_extras/* $(FAASM_SYSROOT)/lib/wasm32-wasi/
 
 llvm: $(BUILD_DIR)/llvm.BUILT
 
-libc: $(BUILD_DIR)/libc.BUILT
+libc: $(BUILD_DIR)/wasi-libc.BUILT
 
 libcxx: $(BUILD_DIR)/libcxx.BUILT
 
-libcxxabi: $(BUILD_DIR)/libcxxabi.BUILT
-
 compiler-rt: $(BUILD_DIR)/compiler-rt.BUILT
 
-build: $(BUILD_DIR)/llvm.BUILT $(BUILD_DIR)/libc.BUILT $(BUILD_DIR)/compiler-rt.BUILT $(BUILD_DIR)/libcxxabi.BUILT $(BUILD_DIR)/libcxx.BUILT extras
+build: $(BUILD_DIR)/llvm.BUILT $(BUILD_DIR)/wasi-libc.BUILT $(BUILD_DIR)/compiler-rt.BUILT $(BUILD_DIR)/libcxx.BUILT extras
diff --git a/WasiToolchain.cmake b/WasiToolchain.cmake
@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 3.4.0)
+cmake_minimum_required(VERSION 3.5.0)
+# project("Faasm WASM compilation toolchain" C CXX)
 
 # -----------------------------------------
 # A useful reference for this file is the wasi-sdk equivalent:
@@ -11,15 +12,16 @@ cmake_minimum_required(VERSION 3.4.0)
 set(INSTALL_DIR $ENV{FAASM_WASM_INSTALL_DIR})
 set(FAASM_SYSROOT $ENV{FAASM_WASM_SYSROOT})
 
-set(EXE_SUFFIX "")
-
 set(UNIX 1)
 
 # Note that system name and processor here are crucial
 # Setting system name automatically switches on cross-compiling
-set(CMAKE_SYSTEM_NAME Wasm)
+set(CMAKE_SYSTEM_NAME WASI)
 set(CMAKE_SYSTEM_VERSION 1)
 set(CMAKE_SYSTEM_PROCESSOR wasm32)
+set(WASM_TRIPLE  wasm32-wasi)
+
+set(WASI_HOST_EXE_SUFFIX "")
 
 if(FAASM_BUILD_SHARED)
     message(STATUS "Faasm building SHARED libraries")
@@ -32,16 +34,17 @@ else()
     set(WASM_TRIPLE $ENV{FAASM_WASM_HOST_STATIC})
 endif()
 
-set(CMAKE_C_COMPILER_TARGET ${WASM_TRIPLE} CACHE STRING "faasm build")
-set(CMAKE_CXX_COMPILER_TARGET ${WASM_TRIPLE} CACHE STRING "faasm build")
-message(STATUS "Faasm building target ${CMAKE_CXX_COMPILER_TARGET}")
-
 # Specify LLVM toolchain
 set(CMAKE_C_COMPILER $ENV{FAASM_WASM_CC})
 set(CMAKE_CXX_COMPILER $ENV{FAASM_WASM_CXX})
+set(CMAKE_ASM_COMPILER $ENV{FAASM_WASM_CC})
 set(CMAKE_AR $ENV{FAASM_WASM_AR} CACHE STRING "faasm build")
 set(CMAKE_NM $ENV{FAASM_WASM_NM} CACHE STRING "faasm build")
 set(CMAKE_RANLIB $ENV{FAASM_WASM_RANLIB} CACHE STRING "faasm build")
+set(CMAKE_C_COMPILER_TARGET ${WASM_TRIPLE} CACHE STRING "faasm build")
+set(CMAKE_CXX_COMPILER_TARGET ${WASM_TRIPLE} CACHE STRING "faasm build")
+set(CMAKE_ASM_COMPILER_TARGET ${WASM_TRIPLE} CACHE STRING "faasm build")
+message(STATUS "Faasm building target ${CMAKE_CXX_COMPILER_TARGET}")
 
 # We define dynamic linking functions in Faasm
 unset(CMAKE_DL_LIBS CACHE)
@@ -72,4 +75,3 @@ set(CMAKE_C_COMPILER_WORKS ON)
 set(CMAKE_CXX_COMPILER_WORKS ON)
 
 set(FAASM_BLAS_LIBS $ENV{FAASM_WASM_BLAS_LIBS})
-
diff --git a/docker/llvm.dockerfile b/docker/llvm.dockerfile
@@ -3,13 +3,26 @@ FROM ubuntu:22.04
 SHELL ["/bin/bash", "-c"]
 ENV CPP_DOCKER="on"
 
+# Configure APT repositories
+ARG LLVM_VERSION_MAJOR
+RUN apt update \
+    && apt upgrade -y \
+    && apt install -y \
+        curl \
+        gpg \
+        software-properties-common \
+        wget \
+    && wget -qO- https://apt.llvm.org/llvm-snapshot.gpg.key | tee /etc/apt/trusted.gpg.d/apt.llvm.org.asc \
+    && add-apt-repository -y "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-${LLVM_VERSION_MAJOR} main"
+
 # Install APT dependencies
 ARG DEBIAN_FRONTEND=noninteractive
 RUN apt update \
     && apt install -y \
         autoconf \
         build-essential \
-        clang-13 \
+        # This clang version is needed to help us build LLVM from source below
+        clang-${LLVM_VERSION_MAJOR} \
         curl \
         git \
         gpg \
@@ -26,7 +39,7 @@ RUN apt remove --purge --auto-remove cmake \
     && mkdir -p /setup \
     && cd /setup \
     && wget -q -O cmake-linux.sh \
-        https://github.com/Kitware/CMake/releases/download/v3.24.2/cmake-3.24.2-linux-x86_64.sh \
+        https://github.com/Kitware/CMake/releases/download/v3.28.0/cmake-3.28.0-linux-x86_64.sh \
     && sh cmake-linux.sh -- --skip-license --prefix=/usr/local \
     && apt clean autoclean -y \
     && apt autoremove -y
@@ -42,6 +55,7 @@ RUN mkdir -p /code \
     && ./bin/create_venv.sh \
     && source venv/bin/activate \
     && inv install \
+    # This task builds LLVM from source and reads the version from faasmtools/env.py
     && inv llvm.build \
     && /usr/local/faasm/toolchain/bin/clang --version \
     && rm -rf /code
diff --git a/tasks/docker.py b/tasks/docker.py
@@ -4,8 +4,9 @@
     ACR_NAME,
 )
 from faasmtools.env import (
-    get_version,
+    LLVM_VERSION,
     PROJ_ROOT,
+    get_version,
 )
 from invoke import task
 from os.path import join
@@ -34,6 +35,7 @@ def build(ctx, c, nocache=False, push=False):
     build_args = {"SYSROOT_VERSION": get_version()}
     for ctr in c:
         if ctr == "llvm":
+            build_args["LLVM_VERSION_MAJOR"] = LLVM_VERSION.split(".")[0]
             dockerfile = LLVM_DOCKERFILE
             tag = get_llvm_tag()
         elif ctr == "cpp-sysroot":

diff --git a/tasks/llvm.py b/tasks/llvm.py
@@ -45,10 +45,11 @@ def do_llvm_clone():
     git_cmd = " ".join(git_cmd)
     run(git_cmd, shell=True, check=True)
 
-    llvm_patches_dir = join(PATCHES_DIR, "llvm-project")
-    for patch in listdir(llvm_patches_dir):
-        git_cmd = "git apply {}".format(join(llvm_patches_dir, patch))
-        run(git_cmd, shell=True, check=True, cwd=LLVM_DIR)
+    # TODO: do we even need this patch anymore?
+    # llvm_patches_dir = join(PATCHES_DIR, "llvm-project")
+    # for patch in listdir(llvm_patches_dir):
+        # git_cmd = "git apply {}".format(join(llvm_patches_dir, patch))
+        # run(git_cmd, shell=True, check=True, cwd=LLVM_DIR)
 
 
 def do_llvm_build(target, clean_target=None):
@@ -92,10 +93,10 @@ def build(ctx, clean=False):
 @task()
 def libs(ctx, clean=False):
     """
-    Build the compiler-rt, libcxx, and libcxxabi for our LLVM fork
+    Build the compiler-rt, and libcxx for our LLVM fork
     """
     do_llvm_build(
-        "libcxx libcxxabi compiler-rt", "clean-libs" if clean else None
+        "libcxx compiler-rt", "clean-libs" if clean else None
     )
 
 

diff --git a/third-party/wasi-libc b/third-party/wasi-libc
+43 −17		.github/workflows/main.yml
+219 −40		Makefile
+29 −17		README.md
+18 −23		dlmalloc/src/malloc.c
+8 −3		emmalloc/emmalloc.c
+1,451 −0		expected/wasm32-wasi-preview2/defined-symbols.txt
+173 −0		expected/wasm32-wasi-preview2/include-all.c
+3,478 −0		expected/wasm32-wasi-preview2/predefined-macros.txt
+209 −0		expected/wasm32-wasi-preview2/undefined-symbols.txt
+6 −0		expected/wasm32-wasi-threads/defined-symbols.txt
+2 −0		expected/wasm32-wasi-threads/include-all.c
+32 −7		expected/wasm32-wasi-threads/predefined-macros.txt
+1 −1		expected/wasm32-wasi-threads/undefined-symbols.txt
+6 −0		expected/wasm32-wasi/defined-symbols.txt
+2 −0		expected/wasm32-wasi/include-all.c
+32 −7		expected/wasm32-wasi/predefined-macros.txt
+1 −1		expected/wasm32-wasi/undefined-symbols.txt
+0 −16		libc-bottom-half/cloudlibc/src/libc/unistd/close.c
+0 −5		libc-bottom-half/headers/public/__errno.h
+7 −0		libc-bottom-half/headers/public/__header_dirent.h
+7 −3		libc-bottom-half/headers/public/__header_sys_socket.h
+1 −1		libc-bottom-half/headers/public/__mode_t.h
+6 −0		libc-bottom-half/headers/public/wasi/libc.h
+2,471 −0		libc-bottom-half/headers/public/wasi/preview2.h
+2 −2		libc-bottom-half/signal/signal.c
+11 −0		libc-bottom-half/sources/__main_void.c
+22 −0		libc-bottom-half/sources/__wasilibc_fd_renumber.c
+41 −0		libc-bottom-half/sources/posix.c
+41 −17		libc-bottom-half/sources/preopens.c
+4,448 −0		libc-bottom-half/sources/preview2.c
+ −		libc-bottom-half/sources/preview2_component_type.o
+0 −1		libc-top-half/musl/arch/wasm32/atomic_arch.h
+11 −1		libc-top-half/musl/include/dlfcn.h
+2 −7		libc-top-half/musl/include/pthread.h
+0 −2		libc-top-half/musl/include/stdlib.h
+0 −2		libc-top-half/musl/include/sys/stat.h
+8 −0		libc-top-half/musl/src/internal/locale_impl.h
+45 −0		libc-top-half/musl/src/misc/dl.c
+49 −21		libc-top-half/musl/src/thread/pthread_create.c
+2 −0		libc-top-half/musl/src/thread/pthread_mutex_trylock.c
+17 −0		libc-top-half/musl/src/thread/wasm32/wasi_thread_start.s
+31 −4		test/Makefile