[cfe-dev] Cannot build Clang etc. on Windows in Debug Mode

Mon Jul 6 15:34:22 PDT 2020

Your ninja output should have a line containing the word "FAILED" which tells you the exact command that failed. The build is highly parallel, so that line can get buried; searching for "FAILED" is the best way to find it.

Also, ninja is parallel by default, so you don't need to specify -j%NUMBER_OF_PROCESSORS% explicitly.

On 7/6/20, 7:53 AM, "cfe-dev on behalf of Oliver Niebuhr via cfe-dev" <cfe-dev-bounces at lists.llvm.org on behalf of cfe-dev at lists.llvm.org> wrote:

    (Originally sent to the cfe-users List, but someone said it is probably
    better to post it here)

    ++++
    Hello List.

    I hope I have subscribed to the correct List - there are a lot of them

    My Problem is:
    Since the last 2.5 Weeks I try to compile Clang Release/10.x in Debug
    Mode. Unfortunately the build always ends with those last Lines:

    "[1960/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangSACheckersEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangSACheckersEmitter.cpp
    [1961/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangOpcodesEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangOpcodesEmitter.cpp
    [1962/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangTypeNodesEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangTypeNodesEmitter.cpp
    [1963/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangOpenCLBuiltinEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangOpenCLBuiltinEmitter.cpp
    [1964/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangOptionDocEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangOptionDocEmitter.cpp
    [1965/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\TableGen.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\TableGen.cpp
    [1966/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ClangDiagnosticsEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\ClangDiagnosticsEmitter.cpp
    [1967/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Ilib\Passes -IC:\Dev\GitRepos\llvm-project\llvm\lib\Passes -Iinclude
    -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
    /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /bigobj /showIncludes
    /Folib\Passes\CMakeFiles\LLVMPasses.dir\PassBuilder.cpp.obj
    /Fdlib\Passes\CMakeFiles\LLVMPasses.dir\LLVMPasses.pdb /FS -c
    C:\Dev\GitRepos\llvm-project\llvm\lib\Passes\PassBuilder.cpp
    [1968/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\NeonEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\NeonEmitter.cpp
    [1969/5008]
    C:\PROGRA~2\MICROS~2\2019\COMMUN~1\VC\Tools\MSVC\1426~1.288\bin\Hostx64\x64\cl.exe
      /TP -DUNICODE -D_CRT_NONSTDC_NO_DEPRECATE -D_CRT_NONSTDC_NO_WARNINGS
    -D_CRT_SECURE_NO_DEPRECATE -D_CRT_SECURE_NO_WARNINGS -D_GNU_SOURCE
    -D_SCL_SECURE_NO_DEPRECATE -D_SCL_SECURE_NO_WARNINGS -D_UNICODE
    -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
    -Itools\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\utils\TableGen
    -IC:\Dev\GitRepos\llvm-project\clang\include -Itools\clang\include
    -Iinclude -IC:\Dev\GitRepos\llvm-project\llvm\include /DWIN32 /D_WINDOWS
      /Zc:inline /Zc:strictStrings /Oi /Zc:rvalueCast /W4 -wd4141 -wd4146
    -wd4244 -wd4267 -wd4291 -wd4345 -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 -wd4324 -w14062 -we4238
    /MDd /Zi /Ob0 /Od /RTC1  /EHsc /GR -std:c++14 /showIncludes
    /Fotools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\MveEmitter.cpp.obj
    /Fdtools\clang\utils\TableGen\CMakeFiles\clang-tblgen.dir\ /FS -c
    C:\Dev\GitRepos\llvm-project\clang\utils\TableGen\MveEmitter.cpp
    [1970/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-callingconv -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenCallingConv.inc -d
    lib/Target/X86/X86GenCallingConv.inc.d"
    [1971/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-exegesis -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenExegesis.inc -d
    lib/Target/X86/X86GenExegesis.inc.d"
    [1972/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-register-info -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenRegisterInfo.inc -d
    lib/Target/X86/X86GenRegisterInfo.inc.d"
    [1973/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-register-bank -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenRegisterBank.inc -d
    lib/Target/X86/X86GenRegisterBank.inc.d"
    [1974/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-x86-EVEX2VEX-tables -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenEVEX2VEXTables.inc -d
    lib/Target/X86/X86GenEVEX2VEXTables.inc.d"
    [1975/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-disassembler -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenDisassemblerTables.inc -d
    lib/Target/X86/X86GenDisassemblerTables.inc.d"
    [1976/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-asm-writer -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenAsmWriter.inc -d
    lib/Target/X86/X86GenAsmWriter.inc.d"
    [1977/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-asm-writer -asmwriternum=1
    -I C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenAsmWriter1.inc -d
    lib/Target/X86/X86GenAsmWriter1.inc.d"
    [1978/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-asm-matcher -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenAsmMatcher.inc -d
    lib/Target/X86/X86GenAsmMatcher.inc.d"
    [1979/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-subtarget -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenSubtargetInfo.inc -d
    lib/Target/X86/X86GenSubtargetInfo.inc.d"
    [1980/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-fast-isel -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenFastISel.inc -d
    lib/Target/X86/X86GenFastISel.inc.d"
    [1981/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-global-isel -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenGlobalISel.inc -d
    lib/Target/X86/X86GenGlobalISel.inc.d"
    [1982/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-instr-info -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenInstrInfo.inc -d
    lib/Target/X86/X86GenInstrInfo.inc.d"
    [1983/5008] cmd.exe /C "cd /D C:\Dev\LLVMx64Build &&
    C:\Dev\LLVMx64Build\bin\llvm-tblgen.exe -gen-dag-isel -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86 -I
    C:/Dev/GitRepos/llvm-project/llvm/include -I
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target
    C:/Dev/GitRepos/llvm-project/llvm/lib/Target/X86/X86.td
    --write-if-changed -o lib/Target/X86/X86GenDAGISel.inc -d
    lib/Target/X86/X86GenDAGISel.inc.d"
    ninja: build stopped: subcommand failed."

    Software Config:
    * Windows 10 2004 x64
    * VS 2019 16.6.3 CMD Prompt
    * Ninja 1.10.0 and 1.10.0git
    * CMake 3.17.3 and 3.18.0-RC2
    * Clang Git Release/10.x
    * Perl: Strawberry Perl 5.30.2
    * Python 3.8.2
    * Happens with x86 and x64 Builds
    * DISABLING Exception Handling and RTTI is not helping (no Idea if it
    should / could)
    * Trying to only build Project=Clang does not help either
    * I am building Clang etc. in Release Mode without Issues since Clang
    7.x Beta = Clang 10.0.1 Release works fine
    * I only try to do a Debug Build since Clang 10, so I cant say if it
    would have worked with older Versions
    * I also only use Clang for the Qt QDoc Parser: I am not using Clang for
    other things yet (mainly because building things still takes at least
    1.5x longer with Clang and Ninja than VS and JOM). So I am still a
    Beginner with Clang when it comes to everday usage

    Configure Line:
    cmake --verbose --debug-output --debug-find --log-level=TRACE --trace
    --trace-expand --trace-format=human
    --trace-redirect="C:\Dev\CMakeTraceLog__Configure_%DATE:/=-%.log"
    %SystemDrive%\Dev\GitRepos\llvm-project\llvm\ -G"Ninja"
    -DCMAKE_VERBOSE_MAKEFILE=ON
    -DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt;libcxx;libcxxabi;lld;lldb;llvm;openmp"
    -DCMAKE_INSTALL_PREFIX=%SystemDrive%\Dev\LLVMx64\
    -DCMAKE_BUILD_TYPE="Debug" -DLLVM_TARGETS_TO_BUILD="X86"
    -DLLVM_INCLUDE_EXAMPLES="OFF" -DLLVM_INCLUDE_TESTS="OFF"
    -DLLVM_INCLUDE_DOCS="OFF"
    -DLLVM_PARALLEL_COMPILE_JOBS="%NUMBER_OF_PROCESSORS%"
    -DLLVM_PARALLEL_LINK_JOBS="%NUMBER_OF_PROCESSORS%" -DLLVM_ENABLE_EH="ON"
    -DLLVM_ENABLE_RTTI="ON" -DPYTHON_HOME=%SystemDrive%\Dev\Pythonx64\
    -DSWIG_DIR=%SystemDrive%\Dev\swigwin\
    -DSWIG_EXECUTABLE=%SystemDrive%\Dev\swigwin\swig.exe

    Ninja Command:
    ninja -v -j%NUMBER_OF_PROCESSORS% 1>c:\dev\llvmdebugbuilderror.log 2>&1

    Is there any way to get more Infos like why llvm-tblgen.exe fails exactly?

    Thanks!
    Olli