93f21c9ef3
* Optimize sandbox performance Link just the files needed to compile, link, or archive, rather than the entire directory tree. This drastically improves build times on macOS, where the sandbox is known to be slow (https://github.com/bazelbuild/bazel/issues/8230). * Linux wants clang to link * all_files not needed? * Linux wants llc * And llvm-ar * Templated build_file_content
93 lines
2.0 KiB
Python
93 lines
2.0 KiB
Python
load(":crosstool.bzl", "emscripten_cc_toolchain_config_rule")
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package(default_visibility = ["//visibility:public"])
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# Name depends on rules_nodejs version being used.
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# https://github.com/emscripten-core/emsdk/issues/1020
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# https://github.com/bazelbuild/rules_nodejs/issues/3375
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node_files = "@nodejs_host//:node_files" if existing_rule("@nodejs_host//:node_files") else "@nodejs//:node_files"
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filegroup(
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name = "common_files",
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srcs = [
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"emscripten_config",
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"env.sh",
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"env.bat",
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node_files,
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],
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)
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filegroup(
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name = "compiler_files",
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srcs = [
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"emcc.sh",
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"emcc.bat",
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"@emsdk//:compiler_files",
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":common_files",
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],
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)
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filegroup(
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name = "linker_files",
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srcs = [
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"emcc_link.sh",
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"emcc_link.bat",
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"link_wrapper.py",
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"@emsdk//:linker_files",
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":common_files",
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],
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)
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filegroup(
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name = "ar_files",
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srcs = [
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"emar.sh",
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"emar.bat",
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"@emsdk//:ar_files",
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":common_files",
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],
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)
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filegroup(name = "empty")
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# dlmalloc.bc is implictly added by the emscripten toolchain
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cc_library(name = "malloc")
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emscripten_cc_toolchain_config_rule(
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name = "wasm",
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cpu = "wasm",
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em_config = "emscripten_config",
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emscripten_binaries = "@emsdk//:compiler_files",
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script_extension = select({
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"@bazel_tools//src/conditions:host_windows": "bat",
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"//conditions:default": "sh",
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}),
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)
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cc_toolchain(
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name = "cc-compiler-wasm",
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all_files = ":empty",
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ar_files = ":ar_files",
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as_files = ":empty",
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compiler_files = ":compiler_files",
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dwp_files = ":empty",
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linker_files = ":linker_files",
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objcopy_files = ":empty",
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strip_files = ":empty",
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toolchain_config = "wasm",
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toolchain_identifier = "emscripten-wasm",
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)
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cc_toolchain_suite(
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name = "everything",
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toolchains = {
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"wasm": ":cc-compiler-wasm",
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"wasm|emscripten": ":cc-compiler-wasm",
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},
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)
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py_binary(
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name = "wasm_binary",
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srcs = ["wasm_binary.py"],
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)
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