[CMake] Problem using VS-compiled Clang as a C/C++ compiler.
Anton Yartsev
anton.yartsev at gmail.com
Wed Mar 9 16:46:27 EST 2016
Hi Cristian,
That's what I did:
1) Created empty directory "D:\CL", moved clang-cl.exe there and renamed
it to cl.exe.
2) Put the paths to cl.exe and Clang first in the global PATH
environment variable. Set path to Clang Includes first in INCLUDE
3) Launched Cmake from an empty project dir.
Still having the same issue. What am I doing wrong? Any ideas?
------ check that project dir is empty:
$dir
Directory of D:\-Work-\llvm-3.7.1.src\-CLANG-\ProjectDir
10.03.2016 00:31 <DIR> .
10.03.2016 00:31 <DIR> ..
10.03.2016 00:31 0 out
1 File(s) 0 bytes
2 Dir(s) 874 200 309 760 bytes free
------ check PATH:
$set PATH
Path=D:\CL;D:\LLVM-3.7.1\bin;...
------ check INCLUDE:
$set INCLUDE
INCLUDE=D:\LLVM-3.7.1\lib\clang\3.7.1\include;C:\Program Files\Microsoft
Visual Studio 12.0\VC\include
------ check which cl.exe is used:
$which cl
D:\CL\cl.EXE
------ trying to build:
$cmake -G "Ninja" -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang ..
-- The C compiler identification is Clang 3.7.1
-- The CXX compiler identification is Clang 3.7.1
-- Check for working C compiler using: Ninja
-- Check for working C compiler using: Ninja -- broken
CMake Error at C:/Program
Files/CMake/share/cmake-3.5/Modules/CMakeTestCCompiler.cmake:61 (message):
The C compiler "D:/LLVM-3.7.1/bin/clang.exe" is not able to compile a
simple test program.
It fails with the following output:
Change Dir:
D:/-Work-/llvm-3.7.1.src/-CLANG-/ProjectDir/CMakeFiles/CMakeTmp
Run Build Command:"C:/PROGRA~1/ninja/ninja.exe" "cmTC_c46bb"
[1/2] Building C object CMakeFiles\cmTC_c46bb.dir\testCCompiler.c.obj
FAILED: D:\LLVM-3.7.1\bin\clang.exe /nologo /DWIN32 /D_WINDOWS /W3
/D_DEBUG
/MDd /Zi /Ob0 /Od /RTC1 /showIncludes
/FoCMakeFiles\cmTC_c46bb.dir\testCCompiler.c.obj
/FdCMakeFiles\cmTC_c46bb.dir\ -c testCCompiler.c
clang.exe: error: no such file or directory: '/nologo'
clang.exe: error: no such file or directory: '/DWIN32'
...
> Hi Anton,
>
> When I say clang-cl I mean how the official llvm package does it - a
> 50mb executable named cl.exe and not clang-cl.exe.
>
> Ninja believes it compiles with visual c++, but instead it compiles
> with clang. That's why you need to put the path to clang INCLUDE and
> PATH first.
>
> Simply rename clang-cl.exe as cl.exe, copy it in a directory and put
> that path as first in the PATH environment variable.
>
> Cheers,
> Cristian.
>
> On Mar 4, 2016 12:16, "Anton Yartsev" <anton.yartsev at gmail.com
> <mailto:anton.yartsev at gmail.com>> wrote:
>
> Hi Cristian,
>
> thanks for the replay. I have clang-cl first in PATH, the problem
> persists.
>
> $ SET PATH
> Path=D:\-Work-\llvm-3.7.1.src\-VS_build VS 2013-\Release\bin;...
>
> $cd D:\-Work-\llvm-3.7.1.src\-VS_build VS 2013-\Release\bin
> $dir
> Directory of D:\-Work-\llvm-3.7.1.src\-VS_build VS 2013-\Release\bin
>
> 04.03.2016 14:03 <DIR> .
> 04.03.2016 14:03 <DIR> ..
> 04.03.2016 01:00 11 662 848 arcmt-test.exe
> 04.03.2016 01:02 6 446 080 bugpoint.exe
> 04.03.2016 01:01 9 728 c-arcmt-test.exe
> 04.03.2016 01:01 82 944 c-index-test.exe
> 04.03.2016 17:20 40 207 872 clang++.exe
> 04.03.2016 01:01 32 803 840 clang-check.exe
> 04.03.2016 17:20 40 207 872 clang-cl.exe
> 04.03.2016 01:00 1 401 856 clang-format.exe
> 04.03.2016 17:05 814 592 clang-tblgen.exe
> 04.03.2016 17:20 40 207 872 clang.exe
> ...
>
>
>> Hi Anton,
>>
>> clang.exe doesn't know of any windows specific things. Clang-cl
>> instead does.
>>
>> Just make sure to have clang-cl before msvc-cl in path and ninja
>> will just work.
>>
>> Cheers,
>> Cristian
>>
>> On Mar 4, 2016 01:31, "Anton Yartsev" <anton.yartsev at gmail.com
>> <mailto:anton.yartsev at gmail.com>> wrote:
>>
>> Hi all,
>>
>> I'm trying to use Clang, compiled with VS 2013
>> (configuration:Release, platform:x64) as a C/C++ compiler for
>> a simple HelloWorld CMake project. Generation ends up with
>> errors like "clang.exe: error: no such file or directory:
>> '/DWIN32'" at compiler check stage. If I understand correctly
>> the problem is that MSVC compiler options are fed to Clang
>> for some reason (maybe the "-- The C compiler identification
>> is unknown" log entry is related to the problem?).
>> Could anyone help to resolve this, please?
>>
>> I also tried to change compiler ID with
>> "-DCMAKE_C_COMPILER_ID=Clang -DCMAKE_CXX_COMPILER_ID=Clang",
>> then compilation succeeded, but linkage failed (just as
>> described in the thread "Question on usage of cmake on
>> Windows with clang"
>> http://thread.gmane.org/gmane.comp.programming.tools.cmake.user/54650).
>> Here the problem seems to be reversed: GNU linker options are
>> fed to MS linker.
>>
>> ************** Setup and details:
>> 1) INCLUDE and PATH set to clang/clang-cl
>> 2) command line environment is configured with vsvars32.bat
>> 3) CC and CXX set to clang
>>
>> $ cat CMakeLists.txt
>> project(test_project)
>> add_executable(main file.cpp)
>>
>> $ cmake -G "Ninja" -DCMAKE_C_COMPILER=clang
>> -DCMAKE_CXX_COMPILER=clang ..
>>
>> Log:
>> -- The C compiler identification is unknown
>> -- The CXX compiler identification is Clang 3.7.1
>> -- Check for working C compiler using: Ninja
>> -- Check for working C compiler using: Ninja -- broken
>> CMake Error at C:/Program
>> Files/CMake/share/cmake-3.5/Modules/CMakeTestCCompiler.cmake:61
>> (message):
>> The C compiler "D:/-Work-/llvm-3.7.1.src/-VS_build VS
>> 2013-/Release/bin/clang.exe" is not able to compile a
>> simple test program.
>> It fails with the following output:
>> Change Dir:
>> D:/-Work-/llvm-3.7.1.src/-CLANG-/CMakeFiles/CMakeTmp
>>
>> Run Build Command:"C:/PROGRA~1/ninja/ninja.exe" "cmTC_2cb9d"
>>
>> [1/2] Building C object
>> CMakeFiles\cmTC_2cb9d.dir\testCCompiler.c.obj
>>
>> FAILED:
>> D:\-Work-\LLVM-3~2.SRC\-VS_BU~2\Release\bin\clang.exe /DWIN32
>> /D_WINDOWS /W3 -o
>> CMakeFiles\cmTC_2cb9d.dir\testCCompiler.c.obj -c
>> testCCompiler.c
>>
>> clang.exe: error: no such file or directory: '/DWIN32'
>> clang.exe: error: no such file or directory: '/D_WINDOWS'
>> ...
>>
>> OS: Windows 7 (x64)
>>
>> clang version 3.7.1 (tags/RELEASE_371/final)
>> Target: x86_64-pc-windows-msvc
>> Thread model: posix
>>
>> cmake version 3.5.0-rc3
>>
>> Thank you!
>>
>> --
>> Anton
>>
>> --
>>
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>
>
> --
> Anton
>
--
Anton
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