[Lldb-commits] [clang] [lldb] [llvm] Remove some `try_compile` CMake checks for compiler flags (PR #92953)

[Vladimir Vereschaka via lldb-commits]

vvereschaka wrote:

Hi @Endilll ,

these changes break MSVC build of the projects including LLDB. The `cl` compiler gets unsupported gcc/clang options, such as `-Wno-deprecated-declarations`, `-Wno-unknown-pragmas` and `-Wno-strict-aliasing`, and gets failed because of it.

Here is the command line:
```
 [267/5832] Building CXX object tools\lldb\utils\TableGen\CMakeFiles\lldb-tblgen.dir\LLDBOptionDefEmitter.cpp.obj
FAILED: tools/lldb/utils/TableGen/CMakeFiles/lldb-tblgen.dir/LLDBOptionDefEmitter.cpp.obj 
ccache C:\PROGRA~1\MICROS~3\2022\COMMUN~1\VC\Tools\MSVC\1439~1.335\bin\Hostx64\x64\cl.exe  /nologo /TP -DGTEST_HAS_RTTI=0 -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_ENABLE_EXTENDED_ALIGNED_STORAGE -D_GLIBCXX_ASSERTIONS -D_HAS_EXCEPTIONS=0 -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -IC:\path-to-build-dir\build-lldb\tools\lldb\utils\TableGen -IC:\path-to-build-dir\lldb\utils\TableGen -IC:\path-to-build-dir\lldb\include -IC:\path-to-build-dir\build-lldb\tools\lldb\include -IC:\path-to-build-dir\build-lldb\include -IC:\path-to-build-dir\llvm\include -IC:\Python312\include -IC:\path-to-build-dir\llvm\..\clang\include -IC:\path-to-build-dir\build-lldb\tools\lldb\..\clang\include -D__OPTIMIZE__ /Zc:inline /Zc:preprocessor /Zc:__cplusplus /Oi /bigobj /permissive- /W4 -wd4141 -wd4146 -wd4244 -wd4267 -wd4291 -wd4351 -wd4456 -wd4457 -wd4458 -wd4459 -wd4503 -wd4624 -wd4722 -wd4100 -wd4127 -wd4512 -wd4505 -wd4610 -wd4510 -wd4702 -wd4245 -wd4706 -wd4310 -wd4701 -wd4703 -wd4389 -wd4611 -wd4805 -wd4204 -wd4577 -wd4091 -wd4592 -wd4319 -wd4709 -wd5105 -wd4324 -w14062 -we4238 /Gw -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing /O2 /Ob2  -MD   -wd4018 -wd4068 -wd4150 -wd4201 -wd4251 -wd4521 -wd4530 -wd4589  /EHs-c- /GR- -UNDEBUG -std:c++17 /showIncludes /Fotools\lldb\utils\TableGen\CMakeFiles\lldb-tblgen.dir\LLDBOptionDefEmitter.cpp.obj /Fdtools\lldb\utils\TableGen\CMakeFiles\lldb-tblgen.dir\ /FS -c C:\path-to-build-dir\lldb\utils\TableGen\LLDBOptionDefEmitter.cpp
```

This is the cl error:
```
cl : Command line error D8021 : invalid numeric argument '/Wno-deprecated-declarations'
```

https://github.com/llvm/llvm-project/pull/92953