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@oligamiq
oligamiq committed Sep 22, 2024
1 parent 29fc7ad commit 73bc239
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Showing 12 changed files with 303 additions and 19 deletions.
10 changes: 5 additions & 5 deletions .gitmodules
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Expand Up @@ -30,11 +30,6 @@
path = src/doc/edition-guide
url = https://github.com/rust-lang/edition-guide.git
shallow = true
[submodule "src/llvm-project"]
path = src/llvm-project
url = https://github.com/rust-lang/llvm-project.git
branch = rustc/18.0-2024-02-13
shallow = true
[submodule "src/doc/embedded-book"]
path = src/doc/embedded-book
url = https://github.com/rust-embedded/book.git
Expand All @@ -43,3 +38,8 @@
path = library/backtrace
url = https://github.com/rust-lang/backtrace-rs.git
shallow = true
[submodule "src/llvm-project"]
path = src/llvm-project
url = https://github.com/YoWASP/llvm-project
branch = main+wasm
shallow = true
7 changes: 5 additions & 2 deletions Cargo.lock
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Expand Up @@ -475,9 +475,12 @@ version = "0.1.0"

[[package]]
name = "cc"
version = "1.0.90"
version = "1.1.15"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
checksum = "57b6a275aa2903740dc87da01c62040406b8812552e97129a63ea8850a17c6e6"
dependencies = [
"shlex",
]

[[package]]
name = "cfg-if"
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26 changes: 24 additions & 2 deletions comment.txt
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Expand Up @@ -2,8 +2,8 @@ Got a new version up. This time all logic to handle using different codegen back

* Make sure you are running on Linux.
* Clone https://github.com/bjorn3/rust
* Checkout the `compile_rustc_for_wasm10` branch
* Download and extract https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-20/wasi-sdk-20.0-linux.tar.gz into the rust checkout.
* Checkout the `compile_rustc_for_wasm15` branch
* Download and extract https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-22/wasi-sdk-22.0-linux.tar.gz into the rust checkout.
* Run `./x.py install` to build the compiler and install it into the dist dir.
* Use `wasmtime run --dir tmp::/ --dir dist dist/bin/rustc.wasm --sysroot dist --target x86_64-unknown-linux-gnu` to run rustc.

Expand All @@ -16,3 +16,25 @@ $ gcc -fuse-ld=lld tmp/rmeta*/lib.rmeta tmp/rust_out.* dist/lib/rustlib/x86_64-u
$ ./rust_out
Hello World!
```

use LLVM
Install example:
WASI_SDK_PATH=`pwd`/wasi-sdk-22.0 WASI_SYSROOT=`pwd`/wasi-sdk-22.0/share/wasi-sysroot WASI_CLANG_WRAPPER_LINKER="`pwd`/wrapper_linker_clang++.sh" ./x.py install

If you just want to run it, https://github.com/oligamiq/rust_wasm/tree/main/rustc_llvm
```
$ mkdir tmp
$ echo 'fn main() { println!("Hello World!"); }' | wasmtime run -Sthreads=y -Spreview2=n --dir tmp::/ --dir dist --env RUST_MIN_STACK=16777216 dist/bin/rustc.wasm - --sysroot dist --target wasm32-wasip1-threads -Csave-temps
$ gcc -fuse-ld=lld tmp/rmeta*/lib.rmeta tmp/rust_out.*.o dist/lib/rustlib/x86_64-unknown-linux-gnu/lib/lib*.rlib -o rust_out
$ ./rust_out
Hello World!
```

to Wasi
```
$ mkdir tmp
$ echo 'fn main() { println!("Hello World!"); }' | wasmtime run -Sthreads=y -Spreview2=n --dir tmp::/ --dir dist --env RUST_MIN_STACK=16777216 dist/bin/rustc.wasm - --sysroot dist --target wasm32-wasip1-threads -Csave-temps
$ wasi-sdk-22.0/bin/wasm-ld --shared-memory --max-memory=1073741824 --import-memory --export __main_void -z stack-size=1048576 --stack-first --allow-undefined --no-demangle --import-memory --export-memory --shared-memory dist/lib/rustlib/wasm32-wasip1-threads/lib/self-contained/crt1-command.o tmp/rust_out.*.o dist/lib/rustlib/wasm32-wasip1-threads/lib/lib*.rlib -L dist/lib/rustlib/wasm32-wasip1-threads/lib/self-contained -lc -o rust_out.wasm
$ wasmtime run -Sthreads=y rust_out.wasm
Hello World!
```
4 changes: 2 additions & 2 deletions compiler/rustc_fs_util/src/lib.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
#![feature(absolute_path)]

#[cfg(any(unix, windows))]
#[cfg(any(unix, windows, target_os = "wasi"))]
use std::ffi::CString;
use std::fs;
use std::io;
Expand Down Expand Up @@ -87,7 +87,7 @@ pub fn path_to_c_string(p: &Path) -> CString {
let p: &OsStr = p.as_ref();
CString::new(p.as_bytes()).unwrap()
}
#[cfg(windows)]
#[cfg(any(windows, target_os = "wasi"))]
pub fn path_to_c_string(p: &Path) -> CString {
CString::new(p.to_str().unwrap()).unwrap()
}
Expand Down
2 changes: 1 addition & 1 deletion compiler/rustc_llvm/Cargo.toml
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Expand Up @@ -10,5 +10,5 @@ libc = "0.2.73"

[build-dependencies]
# tidy-alphabetical-start
cc = "1.0.90"
cc = "1.1.15"
# tidy-alphabetical-end
14 changes: 14 additions & 0 deletions compiler/rustc_llvm/build.rs
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Expand Up @@ -101,6 +101,10 @@ fn output(cmd: &mut Command) -> String {
}

fn main() {
if env::var("TARGET").expect("TARGET was not set").contains("wasi") {
std::env::var("WASI_SYSROOT").expect("WASI_SYSROOT not set");
}

for component in REQUIRED_COMPONENTS.iter().chain(OPTIONAL_COMPONENTS.iter()) {
println!("cargo:rustc-check-cfg=cfg(llvm_component,values(\"{component}\"))");
}
Expand Down Expand Up @@ -201,6 +205,16 @@ fn main() {
cfg.debug(false);
}


if target.contains("wasi") {
// ref src/bootstrap/src/core/build_steps/llvm.rs

let wasi_sysroot = env::var("WASI_SYSROOT").expect("WASI_SYSROOT not set");
cfg.compiler(format!("{wasi_sysroot}/../../bin/{target}-clang++"));
cfg.flag("-pthread");
cfg.flag("-D_WASI_EMULATED_MMAN");
}

rerun_if_changed_anything_in_dir(Path::new("llvm-wrapper"));
cfg.file("llvm-wrapper/PassWrapper.cpp")
.file("llvm-wrapper/RustWrapper.cpp")
Expand Down
2 changes: 0 additions & 2 deletions compiler/rustc_target/src/target_features.rs
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Expand Up @@ -199,11 +199,9 @@ const X86_ALLOWED_FEATURES: &[(&str, Stability)] = &[
("avx512bw", Unstable(sym::avx512_target_feature)),
("avx512cd", Unstable(sym::avx512_target_feature)),
("avx512dq", Unstable(sym::avx512_target_feature)),
("avx512er", Unstable(sym::avx512_target_feature)),
("avx512f", Unstable(sym::avx512_target_feature)),
("avx512fp16", Unstable(sym::avx512_target_feature)),
("avx512ifma", Unstable(sym::avx512_target_feature)),
("avx512pf", Unstable(sym::avx512_target_feature)),
("avx512vbmi", Unstable(sym::avx512_target_feature)),
("avx512vbmi2", Unstable(sym::avx512_target_feature)),
("avx512vl", Unstable(sym::avx512_target_feature)),
Expand Down
41 changes: 41 additions & 0 deletions config.llvm.toml
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@@ -0,0 +1,41 @@
# Includes one of the default files in src/bootstrap/defaults
profile = "compiler"
change-id = 9999999

[rust]
codegen-backends = ["llvm"]
deny-warnings = false
llvm-bitcode-linker = false

[llvm]
cflags = "-march=native"
cxxflags = "-march=native"
static-libstdcpp = true
ninja = false
download-ci-llvm = false
link-shared = false
# thin-lto = true

[build]
docs = false
extended = false
tools = []
# host = ["wasm32-wasip1-threads", "x86_64-unknown-linux-gnu"]
host = ["wasm32-wasip1-threads"]
target = ["x86_64-unknown-linux-gnu", "wasm32-wasip1-threads"]
# target = ["wasm32-wasip1-threads"]
cargo-native-static = true

[install]
prefix = "dist"
sysconfdir = "etc"

[target.'wasm32-wasip1-threads']
wasi-root = "wasi-sdk-22.0/share/wasi-sysroot"
# linker = "wasi-sdk-22.0/bin/wasm-ld"
linker = "./wrapper_linker_clang.sh"
# codegen-backends = ["cranelift"]
codegen-backends = ["llvm"]

[target.'x86_64-unknown-linux-gnu']
cc = "gcc"
8 changes: 4 additions & 4 deletions config.toml
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Expand Up @@ -19,13 +19,13 @@ prefix = "dist"
sysconfdir = "etc"

[target.'wasm32-wasi']
wasi-root = "wasi-sdk-20.0/share/wasi-sysroot"
linker = "wasi-sdk-20.0/bin/clang"
wasi-root = "wasi-sdk-22.0/share/wasi-sysroot"
linker = "wasi-sdk-22.0/bin/clang"
codegen-backends = ["cranelift"]

[target.'wasm32-wasip1-threads']
wasi-root = "wasi-sdk-20.0/share/wasi-sysroot"
linker = "wasi-sdk-20.0/bin/clang"
wasi-root = "wasi-sdk-22.0/share/wasi-sysroot"
linker = "wasi-sdk-22.0/bin/clang"
codegen-backends = ["cranelift"]

[target.'x86_64-unknown-linux-gnu']
Expand Down
172 changes: 172 additions & 0 deletions src/bootstrap/src/core/build_steps/llvm.rs
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Expand Up @@ -501,6 +501,178 @@ impl Step for Llvm {
return res;
}

if target.contains("wasi") {
let wasi_sysroot = env::var("WASI_SYSROOT").expect("WASI_SYSROOT not set");
let wasi_sdk_path = std::path::Path::new(&wasi_sysroot).join("../../").canonicalize().expect("invalid WASI_SYSROOT");
let wasi_sysroot = format!("--sysroot={wasi_sysroot}");
let wasi_sdk_path = wasi_sdk_path.to_str().expect("invalid WASI_SYSROOT");
let wasi_target = target.triple.to_string();
let wasi_cflags = String::from("");
let wasi_ldflags = String::from("");
let wasi_target_llvm = target.triple.to_string();
let wasi_cflags_llvm = format!("{wasi_cflags} -pthread");
let wasi_ldflags_llvm = wasi_ldflags;
// LLVM has some (unreachable in our configuration) calls to mmap.
let wasi_cflags_llvm = format!("{wasi_cflags_llvm} -D_WASI_EMULATED_MMAN");
let wasi_ldflags_llvm = format!("{wasi_ldflags_llvm} -lwasi-emulated-mman");
// Depending on the code being compiled, both Clang and LLD can consume unbounded amounts of memory.
let wasi_ldflags_llvm = format!("{wasi_ldflags_llvm} -Wl,--max-memory=4294967296");
// Compiling C++ code requires a lot of stack space and can overflow and corrupt the heap.
// (For example, `#include <iostream>` alone does it in a build with the default stack size.)
let wasi_ldflags_llvm = format!("{wasi_ldflags_llvm} -Wl,-z,stack-size=1048576 -Wl,--stack-first");
// Some of the host APIs that are statically required by LLVM (notably threading) are dynamically
// never used. An LTO build removes imports of these APIs, simplifying deployment
let wasi_cflags_llvm = format!("{wasi_cflags_llvm} -flto");
let wasi_ldflags_llvm = format!("{wasi_ldflags_llvm} -flto -Wl,--strip-all");

// We need two toolchain files: one for the compiler itself (which needs threads at the moment since
// -DLLVM_ENABLE_THREADS=OFF is kind of broken), and one for the runtime libs.
cfg.define("WASI", "TRUE")
.define("CMAKE_SYSTEM_NAME", "Generic")
.define("CMAKE_SYSTEM_VERSION", "1")
.define("CMAKE_SYSTEM_PROCESSOR", "wasm32")
.define("CMAKE_EXECUTABLE_SUFFIX", ".wasm")
.define("CMAKE_FIND_ROOT_PATH_MODE_PROGRAM", "NEVER")
.define("CMAKE_FIND_ROOT_PATH_MODE_LIBRARY", "ONLY")
.define("CMAKE_FIND_ROOT_PATH_MODE_INCLUDE", "ONLY")
.define("CMAKE_FIND_ROOT_PATH_MODE_PACKAGE", "ONLY")
.define("CMAKE_C_COMPILER", format!("{wasi_sdk_path}/bin/{wasi_target}-clang"))
.define("CMAKE_CXX_COMPILER", format!("{wasi_sdk_path}/bin/{wasi_target}-clang++"))
.define("CMAKE_LINKER", format!("{wasi_sdk_path}/bin/wasm-ld"))
.define("CMAKE_AR", format!("{wasi_sdk_path}/bin/ar"))
.define("CMAKE_RANLIB", format!("{wasi_sdk_path}/bin/ranlib"))
.define("CMAKE_C_COMPILER_TARGET", &wasi_target_llvm)
.define("CMAKE_CXX_COMPILER_TARGET", &wasi_target_llvm)
.define("CMAKE_C_FLAGS", format!("{wasi_sysroot} {wasi_cflags_llvm}"))
.define("CMAKE_CXX_FLAGS", format!("{wasi_sysroot} {wasi_cflags_llvm}"))
.define("CMAKE_EXE_LINKER_FLAGS", wasi_ldflags_llvm)
.define("LLVM_BUILD_SHARED_LIBS", "OFF")
.define("LLVM_ENABLE_PIC", "OFF")
.define("LLVM_BUILD_STATIC", "ON")
// .define("LLVM_ENABLE_THREADS", "OFF")
.define("LLVM_ENABLE_THREADS", "ON")
.define("LLVM_BUILD_RUNTIME", "OFF")
.define("LLVM_BUILD_TOOLS", "OFF")
.define("LLVM_INCLUDE_UTILS", "OFF")
.define("LLVM_BUILD_UTILS", "OFF")
.define("LLVM_INCLUDE_RUNTIMES", "OFF")
.define("LLVM_INCLUDE_EXAMPLES", "OFF")
.define("LLVM_INCLUDE_TESTS", "OFF")
.define("LLVM_INCLUDE_BENCHMARKS", "OFF")
.define("LLVM_INCLUDE_DOCS", "OFF")
.define("LLVM_TOOL_BUGPOINT_BUILD", "OFF")
.define("LLVM_TOOL_BUGPOINT_PASSES_BUILD", "OFF")
.define("LLVM_TOOL_DSYMUTIL_BUILD", "OFF")
.define("LLVM_TOOL_DXIL_DIS_BUILD", "OFF")
.define("LLVM_TOOL_GOLD_BUILD", "OFF")
.define("LLVM_TOOL_LLC_BUILD", "OFF")
.define("LLVM_TOOL_LLI_BUILD", "OFF")
// .define("LLVM_TOOL_LLVM_AR_BUILD", "ON")
// .define("LLVM_TOOL_LLVM_AS_BUILD", "ON")
.define("LLVM_TOOL_LLVM_AS_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_BCANALYZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_CAT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_CFI_VERIFY_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_CONFIG_BUILD", "OFF")
// .define("LLVM_TOOL_LLVM_COV_BUILD", "ON")
.define("LLVM_TOOL_LLVM_CVTRES_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_CXXDUMP_BUILD", "OFF")
// .define("LLVM_TOOL_LLVM_CXXFILT_BUILD", "ON")
.define("LLVM_TOOL_LLVM_CXXMAP_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_C_TEST_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DEBUGINFOD_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DEBUGINFOD_FIND_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DEBUGINFO_ANALYZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DIFF_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DIS_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DIS_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DLANG_DEMANGLE_FUZZER_BUILD", "OFF")
// .define("LLVM_TOOL_LLVM_DRIVER_BUILD", "ON")
// .define("LLVM_TOOL_LLVM_DWARFDUMP_BUILD", "ON")
.define("LLVM_TOOL_LLVM_DWARFUTIL_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_DWP_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_EXEGESIS_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_EXTRACT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_GSYMUTIL_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_IFS_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_ISEL_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_ITANIUM_DEMANGLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_JITLINK_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_JITLISTENER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_LIBTOOL_DARWIN_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_LINK_BUILD", "ON")
.define("LLVM_TOOL_LLVM_LIPO_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_LTO2_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_LTO_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MCA_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MC_ASSEMBLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MC_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MC_DISASSEMBLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MICROSOFT_DEMANGLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_ML_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MODEXTRACT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_MT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_NM_BUILD", "OFF")
// .define("LLVM_TOOL_LLVM_OBJCOPY_BUILD", "ON")
// .define("LLVM_TOOL_LLVM_OBJDUMP_BUILD", "ON")
.define("LLVM_TOOL_LLVM_OPT_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_OPT_REPORT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_PDBUTIL_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_PROFDATA_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_PROFGEN_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_RC_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_READOBJ_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_READTAPI_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_REDUCE_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_REMARKUTIL_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_RTDYLD_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_RUST_DEMANGLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SHLIB_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SIM_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SIZE_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SPECIAL_CASE_LIST_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SPLIT_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_STRESS_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_STRINGS_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_SYMBOLIZER_BUILD", "ON")
.define("LLVM_TOOL_LLVM_TLI_CHECKER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_UNDNAME_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_XRAY_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_YAML_NUMERIC_PARSER_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LLVM_YAML_PARSER_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_LTO_BUILD", "OFF")
.define("LLVM_TOOL_OBJ2YAML_BUILD", "OFF")
.define("LLVM_TOOL_OPT_BUILD", "OFF")
.define("LLVM_TOOL_OPT_VIEWER_BUILD", "OFF")
.define("LLVM_TOOL_REDUCE_CHUNK_LIST_BUILD", "OFF")
.define("LLVM_TOOL_REMARKS_SHLIB_BUILD", "OFF")
.define("LLVM_TOOL_SANCOV_BUILD", "OFF")
.define("LLVM_TOOL_SANSTATS_BUILD", "OFF")
.define("LLVM_TOOL_SPIRV_TOOLS_BUILD", "OFF")
.define("LLVM_TOOL_VERIFY_USELISTORDER_BUILD", "OFF")
.define("LLVM_TOOL_VFABI_DEMANGLE_FUZZER_BUILD", "OFF")
.define("LLVM_TOOL_XCODE_TOOLCHAIN_BUILD", "OFF")
.define("LLVM_TOOL_YAML2OBJ_BUILD", "OFF")
// .define("LLVM_ENABLE_PROJECTS", "clang;lld")
.define("LLVM_ENABLE_PROJECTS", "")
// .define("CLANG_ENABLE_ARCMT", "OFF")
// .define("CLANG_ENABLE_STATIC_ANALYZER", "OFF")
// .define("CLANG_INCLUDE_TESTS", "OFF")
// .define("CLANG_BUILD_TOOLS", "OFF")
// .define("CLANG_TOOL_CLANG_SCAN_DEPS_BUILD", "OFF")
// .define("CLANG_TOOL_CLANG_INSTALLAPI_BUILD", "OFF")
// .define("CLANG_BUILD_EXAMPLES", "OFF")
// .define("CLANG_INCLUDE_DOCS", "OFF")
// .define("CLANG_LINKS_TO_CREATE", "clang;clang++")
// .define("CLANG_LINKS_TO_CREATE", "")
.define("LLD_BUILD_TOOLS", "OFF")
.define("CMAKE_BUILD_TYPE", "MinSizeRel")
.define("HAVE_DLOPEN", "");
} else {
cfg.define("LLVM_TOOL_LLVM_CONFIG_BUILD", "ON")
.define("LLVM_BUILD_TOOLS", "ON");
}

cfg.build();

// Helper to find the name of LLVM's shared library on darwin and linux.
Expand Down
2 changes: 1 addition & 1 deletion src/llvm-project
Submodule llvm-project updated from af8f9e to 69bd85
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