| Issue |
125246
|
| Summary |
Libclc build issue - `libclc toolchain incomplete - missing tool clang!`
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
hamidelmaazouz
|
Trying to build a full LLVM `release/19.x` from source using these settings:
```
{
"version": 6,
"configurePresets": [
{
"name": "base",
"hidden": true,
"generator": "Ninja",
"binaryDir": "${sourceDir}/build/${presetName}",
"installDir": "/opt/llvm/${presetName}",
"cacheVariables": {
"CMAKE_C_COMPILER_LAUNCHER": "ccache",
"CMAKE_C_COMPILER": "/opt/llvm/latest/bin/clang",
"CMAKE_CXX_COMPILER_LAUNCHER": "ccache",
"CMAKE_CXX_COMPILER": "/opt/llvm/latest/bin/clang++",
"BUILD_SHARED_LIBS": "ON",
"LLVM_CCACHE_BUILD": "ON",
"LLVM_INCLUDE_TESTS": "ON",
"LLVM_BUILD_TESTS": "ON",
"LLVM_BUILD_TOOLS": "ON",
"LLVM_BUILD_EXAMPLES": "ON",
"LLVM_ENABLE_ASSERTIONS": "ON",
"LLVM_ENABLE_RTTI": "ON",
"LLVM_ENABLE_EH": "OFF",
"LLVM_USE_LINKER": "lld"
}
},
{
"name": "llvm-19",
"displayName": "Configure LLVM-19",
"inherits": "base",
"cacheVariables": {
"CMAKE_BUILD_TYPE": "Release",
"LLVM_OPTIMIZED_TABLEGEN": "ON",
"LLVM_USE_SPLIT_DWARF": "ON",
"LLVM_ENABLE_PROJECTS": "all",
"LLVM_ENABLE_RUNTIMES": "all",
"LLVM_TARGETS_TO_BUILD": "host"
}
}
]
}
```
`/opt/llvm/latest/bin/clang` is just a custom built Clang from a prior LLVM version (actually 19git when it was still being rolling out). I then invoked the preset with `cmake --preset llvm-19`, but the configure phase failed with:
```
CMake Error at /some/path/llvm-project/libclc/CMakeLists.txt:102 (message):
libclc toolchain incomplete - missing tool clang!
```
Any idea what I missed ?
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