| Issue |
126444
|
| Summary |
llvm-ml fails to compile five-line Vulkan-Loader CMake MASM compiler tests
|
| Labels |
new issue
|
| Assignees |
|
| Reporter |
tfinnegan937
|
When cross-compiling with MinGW (Or clang targeting MinGW), the Vulkan-Loader CMake configuration runs the following command to check if the MASM compiler works:
${CMAKE_ASM_MASM_COMPILER} ${CMAKE_ASM_MASM_FLAGS} -c -Fo ${CMAKE_CURRENT_BUILD_DIR}/masm_check.obj ./mask_check.asm
In my case, CMAKE_ASM_MASM_COMPILER is llvm-ml.
The source files are not included with the Vulkan-Loader project -- rather, they're generated by CMake. This is the assembly file that the Vulkan Loader has generated:
```masm
.code
extrn start:near
xor rax, rax
ret
end
```
Compiling this assembly with the normal inputs and swapping the assembler with llvm-ml produces the following error:
```bash
llvm-ml -m64 -c -Fo ./masm_check.obj ./masm_check.asm
./masm_check.asm:2:13: error: unrecognized type in directive 'extern'
extrn start:near
```
I do not personally know MASM assembly at all -- I'm not working on any MASM projects. I am trying to cross-compile Vulkan, however, and it relies on the presence of a MASM compiler on windows targets to implement certain features. MinGW on Windows hosts uses ml64.exe to assemble masm files, but they do not provide an ml64 binary on linux. llvm-ml is currently my only option for that.
Due to my lack of experience with MASM, I'm not sure if this is a bug with llvm-ml, or a bug with Vulkan-Loader. I decided to start here as it seems to work fine with other MASM compilers.
LLVM Version:
```bash
tfinnegan@fedora:~/Projects/worldstate-engine/out/build/config-ninja-windows-cross-linux-clang/_deps/vulkan-loader-build/loader$ llvm-as --version
LLVM (http://llvm.org/):
LLVM version 19.1.7
Optimized build.
```
llvm-ml does not have a version flag itself, but I assume it built with the same version of llvm as my installed llvm-as binary.
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