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https://github.com/codewithmirza/sample4
compiling libclang from the llvm repository to WASM.
https://github.com/codewithmirza/sample4
c cpp libclang llvm webassembly
Last synced: 19 days ago
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compiling libclang from the llvm repository to WASM.
- Host: GitHub
- URL: https://github.com/codewithmirza/sample4
- Owner: codewithmirza
- Created: 2024-03-28T10:46:44.000Z (9 months ago)
- Default Branch: main
- Last Pushed: 2024-04-02T19:42:48.000Z (9 months ago)
- Last Synced: 2024-11-07T03:57:30.635Z (2 months ago)
- Topics: c, cpp, libclang, llvm, webassembly
- Homepage:
- Size: 43.1 MB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Support: Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3.c.o
Awesome Lists containing this project
README
# Compiling libclang from the llvm repository to WASM.
## Prerequisites
- Install Emscripten: Ensure you have Emscripten installed and set up on your system. You can download and install it from the official Emscripten website.
- Clone the llvm-project from LLVM Repository.
- Install Ninja `sudo install Ninja`
## Steps
1. **Create Build Directory**:
- Before configuring LLVM/Clang, create a build directory named `build.emscripten`:
```
mkdir build.emscripten
```
2. **Configure LLVM/Clang with Emscripten**:
- Run the following command to configure LLVM/Clang with Emscripten:
```
emcmake cmake -S llvm -B build.emscripten -G Ninja -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_PROJECTS='llvm;clang;clang-tools-extra' -DCMAKE_EXPORT_COMPILE_COMMANDS=on -DCMAKE_LINKER="/mnt/d/emscripten/emsdk/upstream/bin/lld" -DLLVM_TARGET_TRIPLE="wasm32-unknown-emscripten"
```
3. **Build LLVM/Clang with Emscripten**:
- Run the following command to build LLVM/Clang with Emscripten:
```
cmake --build build.emscripten --target libclang
```
4. **Extract `libclang.a`**:
- After the build process is complete, extract `libclang.a` from the LLVM/Clang build directory:
```
ar x build.emscripten/lib/libclang.a
```
5. **Compile `libclang.a` to `libclang.wasm`**:
- Change to the lib directory and use Emscripten's `emcc` compiler to compile `libclang.a` to WebAssembly:
```
cd build.emscripten/lib
emcc -o libclang.wasm *.o --no-entry
```
6. **Locate `libclang.wasm`**:
- After compiling, you can find the resulting `libclang.wasm` file in the `build.emscripten/lib` directory.
## Additional Notes
- Be sure to check the Emscripten documentation for any specific configuration options or considerations when compiling C/C++ code to WebAssembly.
- Experiment with different build configurations and options to optimize performance and compatibility for your specific use case.
## Files in the `libclang` Folder Before Process
```
Directory: D:\llvm-project\clang\tools\libclang
Mode File Name
---- ------------- ------ ----
-a---- ARCMigrate.cpp
-a---- BuildSystem.cpp
-a---- CIndex.cpp
-a---- CIndexCodeCompletion.cpp
-a---- CIndexCXX.cpp
...
...
-a---- CXType.cpp
-a---- CXType.h
-a---- FatalErrorHandler.cpp
-a---- Indexing.cpp
-a---- Index_Internal.h
-a---- libclang.map
-a---- linker-script-to-export-list.py
-a---- Rewrite.cpp
---- ------------- ------ ----
```
## Files in `build.emscripten/lib` folder after build/configuration process
```
Directory: D:\llvm-project\clang\tools\libclang
Mode File Name
---- ------------- ------ ----
-a---- ARCMigrate.cpp.o
-a---- BuildSystem.cpp.o
-a---- CIndex.cpp.o
-a---- CIndexCodeCompletion.cpp.o
-a---- CIndexCXX.cpp.o
...
...
-a---- CXType.cpp.o
-a---- CXType.h.o
-a---- FatalErrorHandler.cpp.o
-a---- Indexing.cpp.o
-a---- Index_Internal.h.o
-a---- libclang.map.o
-a---- linker-script-to-export-list.py.o
-a---- Rewrite.cpp.o
---- ------------- ------ ----
```