| Issue |
167249
|
| Summary |
Compilation error in RuntimeLibcalls.cpp possibly from unintended macro inclusion
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
sofiedotcafe
|
Hi,
I'm encountering a build failure while compiling the pull request [[clang]: reflection operator parsing for global namespace and primitive types #164692](https://github.com/llvm/llvm-project/pull/164692) (the branch is at [changkhothuychung:refl-parse](https://github.com/changkhothuychung/llvm-project/tree/refl-parse)) with it failing on `RuntimeLibcalls.cpp`. It appears that `GET_RUNTIME_LIBCALL_ENUM` is being defined, despite not being explicitly set within the `RuntimeLibcalls.cpp` translation unit.
This behavior suggests that `GET_RUNTIME_LIBCALL_ENUM` is being unintentionally defined or inherited through an unexpected include path or macro leakage, even though it should be conditionally guarded. I presume this is an build environment issue, but how could that even cause this?
Here’s a snippet of the error for reference:
```cpp
In file included from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/include/llvm/IR/RuntimeLibcalls.h:171,
from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/lib/IR/RuntimeLibcalls.cpp:9:
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc: In static member function 'static llvm::iota_range<llvm::RTLIB::LibcallImpl> llvm::RTLIB::RuntimeLibcallsInfo::lookupLibcallImplName(llvm::StringRef)':
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:11:1: error: 'namespace' definition is not allowed here
11 | namespace llvm {
| ^~~~~~~~~
```
<details>
<summary>Full build error</summary>
```cpp
In file included from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/include/llvm/IR/RuntimeLibcalls.h:171,
from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/lib/IR/RuntimeLibcalls.cpp:9:
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc: In static member function 'static llvm::iota_range<llvm::RTLIB::LibcallImpl> llvm::RTLIB::RuntimeLibcallsInfo::lookupLibcallImplName(llvm::StringRef)':
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:11:1: error: 'namespace' definition is not allowed here
11 | namespace llvm {
| ^~~~~~~~~
In file included from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/lib/IR/RuntimeLibcalls.cpp:23:
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc: At global scope:
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:13:6: error: multiple definition of 'enum llvm::RTLIB::Libcall'
13 | enum Libcall : unsigned short {
| ^~~~~~~
In file included from /build/llvm-src-22.0.0-unstable-2025-10-19/llvm/include/llvm/IR/RuntimeLibcalls.h:33:
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:13:6: note: previous definition here
13 | enum Libcall : unsigned short {
| ^~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:842:6: error: multiple definition of 'enum llvm::RTLIB::LibcallImpl'
842 | enum LibcallImpl : unsigned short {
| ^~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:842:6: note: previous definition here
842 | enum LibcallImpl : unsigned short {
| ^~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:2587:18: error: redefinition of 'constexpr const size_t llvm::RTLIB::NumLibcallImpls'
2587 | constexpr size_t NumLibcallImpls = 1743;
| ^~~~~~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:2587:18: note: 'constexpr const size_t llvm::RTLIB::NumLibcallImpls' previously defined here
2587 | constexpr size_t NumLibcallImpls = 1743;
| ^~~~~~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:9466:17: error: 'Name' was not declared in this scope
9466 | size_t Size = Name.size();
| ^~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:9467:3: error: expected unqualified-id before 'if'
9467 | if (Size == 0 || Size > 53)
| ^~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:9469:2: error: expected unqualified-id before 'return'
9469 | return lookupLibcallImplNameImpl(Name);
| ^~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc: In member function 'void llvm::RTLIB::RuntimeLibcallsInfo::setTargetRuntimeLibcallSets(const llvm::Triple&, llvm::ExceptionHandling, llvm::FloatABI::ABIType, llvm::EABI, llvm::StringRef)':
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:23006:57: warning: enumerated and non-enumerated type in conditional _expression_ [-Wextra]
23006 | setLibcallImplCallingConv(Impl, TT.isWatchABI() ? DefaultCC :
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
23007 | (isAAPCS_ABI(TT, ABIName) ? CallingConv::ARM_AAPCS : CallingConv::ARM_APCS));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:23019:57: warning: enumerated and non-enumerated type in conditional _expression_ [-Wextra]
23019 | setLibcallImplCallingConv(Impl, TT.isWatchABI() ? DefaultCC :
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
23020 | (isAAPCS_ABI(TT, ABIName) ? CallingConv::ARM_AAPCS : CallingConv::ARM_APCS));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/build/llvm-src-22.0.0-unstable-2025-10-19/llvm/build/include/llvm/IR/RuntimeLibcalls.inc:23034:57: warning: enumerated and non-enumerated type in conditional _expression_ [-Wextra]
23034 | setLibcallImplCallingConv(Impl, TT.isWatchABI() ? DefaultCC :
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
23035 | (isAAPCS_ABI(TT, ABIName) ? CallingConv::ARM_AAPCS : CallingConv::ARM_APCS));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
```
</details>
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