build: enable WAMR and LLVM builds.

Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>

.github/workflows/cpp.yml

@@ -60,7 +60,7 @@ jobs:
     strategy:
       matrix:
         # TODO(mathetake): Add other runtimes.
-        runtime: [ "wasmtime" ]
+        runtime: [ "wamr", "wasmtime" ]
 
     steps:
     - uses: actions/checkout@v2

BUILD

@@ -54,13 +54,12 @@ cc_library(
 cc_library(
     name = "wamr_lib",
     srcs = glob([
-        # TODO(@mathetake): Add WAMR lib.
-        # "src/wamr/*.h",
-        # "src/wamr/*.cc",
+        "src/wamr/*.h",
+        "src/wamr/*.cc",
     ]),
     deps = [
         ":common_lib",
-        # TODO(@mathetake): Add WAMR lib.
+        "@wamr//:wamr_lib",
     ],
 )
 

bazel/external/llvm.BUILD

@@ -0,0 +1,115 @@
+load("@rules_foreign_cc//foreign_cc:defs.bzl", "cmake")
+
+licenses(["notice"])  # Apache 2
+
+package(default_visibility = ["//visibility:public"])
+
+filegroup(
+    name = "srcs",
+    srcs = glob(["**"]),
+    visibility = ["//visibility:public"],
+)
+
+cmake(
+    name = "llvm_lib",
+    cache_entries = {
+        # Disable both: BUILD and INCLUDE, since some of the INCLUDE
+        # targets build code instead of only generating build files.
+        "LLVM_BUILD_DOCS": "off",
+        "LLVM_INCLUDE_DOCS": "off",
+        "LLVM_BUILD_EXAMPLES": "off",
+        "LLVM_INCLUDE_EXAMPLES": "off",
+        "LLVM_BUILD_RUNTIME": "off",
+        "LLVM_BUILD_RUNTIMES": "off",
+        "LLVM_INCLUDE_RUNTIMES": "off",
+        "LLVM_BUILD_TESTS": "off",
+        "LLVM_INCLUDE_TESTS": "off",
+        "LLVM_BUILD_TOOLS": "off",
+        "LLVM_INCLUDE_TOOLS": "off",
+        "LLVM_BUILD_UTILS": "off",
+        "LLVM_INCLUDE_UTILS": "off",
+        "LLVM_ENABLE_LIBEDIT": "off",
+        "LLVM_ENABLE_LIBXML2": "off",
+        "LLVM_ENABLE_TERMINFO": "off",
+        "LLVM_ENABLE_ZLIB": "off",
+        "LLVM_TARGETS_TO_BUILD": "X86",
+        "CMAKE_CXX_COMPILER_FORCED": "on",
+        # Workaround for the issue with statically linked libstdc++
+        # using -l:libstdc++.a.
+        "CMAKE_CXX_FLAGS": "-lstdc++",
+    },
+    env_vars = {
+        # Workaround for the -DDEBUG flag added in fastbuild on macOS,
+        # which conflicts with DEBUG macro used in LLVM.
+        "CFLAGS": "-UDEBUG",
+        "CXXFLAGS": "-UDEBUG",
+        "ASMFLAGS": "-UDEBUG",
+    },
+    lib_source = ":srcs",
+    static_libraries = [
+        # Order from llvm-config --libnames.
+        "libLLVMInterpreter.a",
+        "libLLVMWindowsManifest.a",
+        "libLLVMLibDriver.a",
+        "libLLVMObjectYAML.a",
+        "libLLVMCoverage.a",
+        "libLLVMLineEditor.a",
+        "libLLVMDlltoolDriver.a",
+        "libLLVMOption.a",
+        "libLLVMTableGen.a",
+        "libLLVMFuzzMutate.a",
+        "libLLVMSymbolize.a",
+        "libLLVMCoroutines.a",
+        "libLLVMDebugInfoPDB.a",
+        "libLLVMLTO.a",
+        "libLLVMObjCARCOpts.a",
+        "libLLVMMIRParser.a",
+        "libLLVMOrcJIT.a",
+        "libLLVMOrcError.a",
+        "libLLVMJITLink.a",
+        "libLLVMPasses.a",
+        "libLLVMipo.a",
+        "libLLVMInstrumentation.a",
+        "libLLVMVectorize.a",
+        "libLLVMLinker.a",
+        "libLLVMIRReader.a",
+        "libLLVMAsmParser.a",
+        "libLLVMX86Disassembler.a",
+        "libLLVMX86AsmParser.a",
+        "libLLVMX86CodeGen.a",
+        "libLLVMCFGuard.a",
+        "libLLVMGlobalISel.a",
+        "libLLVMSelectionDAG.a",
+        "libLLVMAsmPrinter.a",
+        "libLLVMDebugInfoDWARF.a",
+        "libLLVMCodeGen.a",
+        "libLLVMScalarOpts.a",
+        "libLLVMInstCombine.a",
+        "libLLVMAggressiveInstCombine.a",
+        "libLLVMTransformUtils.a",
+        "libLLVMBitWriter.a",
+        "libLLVMX86Desc.a",
+        "libLLVMMCDisassembler.a",
+        "libLLVMX86Utils.a",
+        "libLLVMX86Info.a",
+        "libLLVMMCJIT.a",
+        "libLLVMExecutionEngine.a",
+        "libLLVMTarget.a",
+        "libLLVMAnalysis.a",
+        "libLLVMProfileData.a",
+        "libLLVMRuntimeDyld.a",
+        "libLLVMObject.a",
+        "libLLVMTextAPI.a",
+        "libLLVMMCParser.a",
+        "libLLVMBitReader.a",
+        "libLLVMMC.a",
+        "libLLVMDebugInfoCodeView.a",
+        "libLLVMDebugInfoMSF.a",
+        "libLLVMCore.a",
+        "libLLVMRemarks.a",
+        "libLLVMBitstreamReader.a",
+        "libLLVMBinaryFormat.a",
+        "libLLVMSupport.a",
+        "libLLVMDemangle.a",
+    ],
+)

bazel/external/llvm.patch

@@ -0,0 +1,25 @@
+# Workaround for Envoy's CMAKE_BUILD_TYPE=Bazel.
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -247,7 +247,7 @@
+ string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
+
+ if (CMAKE_BUILD_TYPE AND
+-    NOT uppercase_CMAKE_BUILD_TYPE MATCHES "^(DEBUG|RELEASE|RELWITHDEBINFO|MINSIZEREL)$")
++    NOT uppercase_CMAKE_BUILD_TYPE MATCHES "^(DEBUG|RELEASE|RELWITHDEBINFO|MINSIZEREL|BAZEL)$")
+   message(FATAL_ERROR "Invalid value for CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
+ endif()
+
+# Workaround for a missing -fuse-ld flag in CXXFLAGS, which results in
+# different linkers being used during configure and compilation phases.
+--- a/cmake/modules/HandleLLVMOptions.cmake
++++ b/cmake/modules/HandleLLVMOptions.cmake
+@@ -718,8 +718,6 @@ endif()
+ if (UNIX AND CMAKE_GENERATOR STREQUAL "Ninja")
+   include(CheckLinkerFlag)
+   check_linker_flag("-Wl,--color-diagnostics" LINKER_SUPPORTS_COLOR_DIAGNOSTICS)
+-  append_if(LINKER_SUPPORTS_COLOR_DIAGNOSTICS "-Wl,--color-diagnostics"
+-    CMAKE_EXE_LINKER_FLAGS CMAKE_MODULE_LINKER_FLAGS CMAKE_SHARED_LINKER_FLAGS)
+ endif()
+
+ # Add flags for add_dead_strip().

bazel/external/wamr.BUILD

@@ -1,7 +1,7 @@
-licenses(["notice"])  # Apache 2
-
 load("@rules_foreign_cc//foreign_cc:defs.bzl", "cmake")
 
+licenses(["notice"])  # Apache 2
+
 package(default_visibility = ["//visibility:public"])
 
 filegroup(
@@ -11,15 +11,21 @@ filegroup(
 )
 
 cmake(
-    name = "libiwasm",
+    name = "wamr_lib",
     cache_entries = {
+        "LLVM_DIR": "$EXT_BUILD_DEPS/copy_llvm/llvm/lib/cmake/llvm",
         "WAMR_BUILD_INTERP": "1",
         "WAMR_BUILD_JIT": "0",
         "WAMR_BUILD_AOT": "0",
         "WAMR_BUILD_SIMD": "0",
         "WAMR_BUILD_MULTI_MODULE": "1",
         "WAMR_BUILD_LIBC_WASI": "0",
+        "WAMR_BUILD_TAIL_CALL": "1",
     },
+    defines = ["WASM_WAMR"],
     lib_source = ":srcs",
-    out_shared_libs = ["libiwasm.so"],
+    static_libraries = ["libvmlib.a"],
+    deps = [
+        "@llvm//:llvm_lib",
+    ],
 )

bazel/external/wasm-c-api.BUILD

@@ -1,3 +1,5 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
 licenses(["notice"])  # Apache 2
 
 package(default_visibility = ["//visibility:public"])

bazel/external/wasmtime.BUILD

@@ -1,3 +1,4 @@
+load("@rules_cc//cc:defs.bzl", "cc_library")
 load("@rules_rust//rust:rust.bzl", "rust_library")
 
 licenses(["notice"])  # Apache 2

bazel/repositories.bzl

@@ -80,3 +80,13 @@ def proxy_wasm_cpp_host_repositories():
         strip_prefix = "rules_foreign_cc-0.2.0",
         url = "https://github.com/bazelbuild/rules_foreign_cc/archive/0.2.0.tar.gz",
     )
+
+    http_archive(
+        name = "llvm",
+        build_file = "@proxy_wasm_cpp_host//bazel/external:llvm.BUILD",
+        sha256 = "df83a44b3a9a71029049ec101fb0077ecbbdf5fe41e395215025779099a98fdf",
+        strip_prefix = "llvm-10.0.0.src",
+        url = "https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/llvm-10.0.0.src.tar.xz",
+        patch_args = ["-p1"],
+        patches = ["@proxy_wasm_cpp_host//bazel/external:llvm.patch"],
+    )