How to use clang with mingw-w64 headers on windows
I have clang 3.9 from http://llvm.org/releases/3.9.0/LLVM-3.9.0-win32.exe
clang version 3.9.0 (branches/release_39)
Target: i686-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
And gcc 6.2.0 (Mingw-w64)
gcc (i686-posix-dwarf-rev1, Built by MinGW-W64 project) 6.2.0
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I don't have MSVC installed on my PC and no Windows SDK. I need a specific clang feature and wanted to replace it with gcc and more specifically g ++ because I am using C ++.
When I try to compile a simple file, I get:
fatal error: file 'string' not found
Does this mean my current clang installation doesn't support mingw on windows? Basically all I want is to use headers and libraries from my mingw-w64 installation. I searched for solutions and couldn't find anything. I do not know what to do.
This also means my clang installation is MSVC dependent, which I don't have?
EDIT: From a comment on this page: http://blog.johannesmp.com/2015/09/01/installing-clang-on-windows-pt2/
This no longer works with the latest binaries (3.7.1, 3.8, 3.9) from LLVM, because they were compiled with Visual Studio and for Visual Studio.
You can install the full version of Visual Studio 2015 (takes about 8GB) or install "Microsoft Visual C ++ Build Tools 2015 Update 3" which contains only the command line tools from VS plus the standard C ++ that Clang requires.
I think that explains everything. Does this mean that I need to create mingw in order to make it work with mingw?
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The right thing to do is ...
clang -target i686-pc-windows-gnu test.c -otest.exe
Or if you want 64-bit output ...
clang -target x86_64-pc-windows-gnu test.c -otest.exe
Clang will detect the location of headers and libraries from your path. Make sure you only have the Mingw version in your path that you are targeting.
By default, the current version of Clang (5.0.0 at the moment) will target x86_64-pc-windows-msvc
As an example...
Microsoft Windows [Version 10.0.16299.19]
(c) 2017 Microsoft Corporation. All rights reserved.
C:\Users\burito>copy con hello.c
#include <stdio.h>
int main(int argc, char *argv[])
{
printf("Hello World!\n");
return 0;
}
^Z
1 file(s) copied.
C:\Users\burito>clang hello.c -ohello.exe --verbose
clang version 5.0.0 (tags/RELEASE_500/final)
Target: x86_64-pc-windows-msvc
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
clang.exe: warning: unable to find a Visual Studio installation; try running Clang from a developer command prompt [-Wmsvc-not-found]
"C:\\Program Files\\LLVM\\bin\\clang.exe" -cc1 -triple x86_64-pc-windows- msvc18.0.0 -emit-obj -mrelax-all -mincremental-linker-compatible -disable-free - disable-llvm-verifier -discard-value-names -main-file-name hello.c -mrelocation- model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -momit-leaf-frame-pointer -v -dwarf-column-info -debugger-tuning=gdb -resource-dir "C:\\Program Files\\LLVM\\lib\\clang\\5.0.0" -internal-isystem "C:\\Program Files\\LLVM\\lib\\clang\\5.0.0\\include" -internal-isystem C:/Program Files/Microsoft Visual Studio 10.0/VC/include -internal-isystem C:/Program Files/Microsoft Visual Studio 9.0/VC/include -internal-isystem C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include -internal-isystem C:/Program Files/Microsoft Visual Studio 8/VC/include -internal-isystem C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include -fdebug-compilation-dir "C:\\Users\\burito" -ferror-limit 19 -fmessage-length 120 -fms-extensions -fms-compatibility -fms-compatibility-version=18 -fno-threadsafe-statics -fdelayed-template-parsing -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o "C:\\Users\\burito\\AppData\\Local\\Temp\\hello-5c526d.o" -x c hello.c
clang -cc1 version 5.0.0 based upon LLVM 5.0.0 default target x86_64-pc-windows-msvc
ignoring nonexistent directory "C:/Program Files/Microsoft Visual Studio 10.0/VC/include"
ignoring nonexistent directory "C:/Program Files/Microsoft Visual Studio 9.0/VC/include"
ignoring nonexistent directory "C:/Program Files/Microsoft Visual Studio 9.0/VC/PlatformSDK/Include"
ignoring nonexistent directory "C:/Program Files/Microsoft Visual Studio 8/VC/include"
ignoring nonexistent directory "C:/Program Files/Microsoft Visual Studio 8/VC/PlatformSDK/Include"
#include "..." search starts here:
#include <...> search starts here:
C:\Program Files\LLVM\lib\clang\5.0.0\include
End of search list.
hello.c:1:10: fatal error: 'stdio.h' file not found
#include <stdio.h>
^~~~~~~~~
1 error generated.
C:\Users\burito>clang hello.c -ohello.exe --verbose -target x86_64-pc-windows-gnu
clang version 5.0.0 (tags/RELEASE_500/final)
Target: x86_64-pc-windows-gnu
Thread model: posix
InstalledDir: C:\Program Files\LLVM\bin
"C:\\Program Files\\LLVM\\bin\\clang.exe" -cc1 -triple x86_64-pc-windows-gnu -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -discard-value-names -main-file-name hello.c -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -target-cpu x86-64 -momit-leaf-frame-pointer -v -dwarf-column-info -debugger-tuning=gdb -resource-dir "C:\\Program Files\\LLVM\\lib\\clang\\5.0.0" -internal-isystem "C:\\Program Files\\LLVM\\lib\\clang\\5.0.0\\include" -internal-isystem "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\x86_64-w64-mingw32/sys-root/mingw/include" -internal-isystem "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\x86_64-w64-mingw32\\include" -internal-isystem "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\include" -fdebug-compilation-dir "C:\\Users\\burito" -ferror-limit 19 -fmessage-length 120 -fno-use-cxa-atexit -fobjc-runtime=gcc -fdiagnostics-show-option -fcolor-diagnostics -o "C:\\Users\\burito\\AppData\\Local\\Temp\\hello-d88ba4.o" -x c hello.c
clang -cc1 version 5.0.0 based upon LLVM 5.0.0 default target x86_64-pc-windows-msvc
ignoring nonexistent directory "C:\Program Files\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev0\mingw64\x86_64-w64-mingw32/sys-root/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
C:\Program Files\LLVM\lib\clang\5.0.0\include
C:\Program Files\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev0\mingw64\x86_64-w64-mingw32\include
C:\Program Files\mingw-w64\x86_64-7.2.0-posix-seh-rt_v5-rev0\mingw64\include
End of search list.
"C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\bin\\ld.exe" -m i386pep -Bdynamic -o hello.exe "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\x86_64-w64-mingw32\\lib\\crt2.o" "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\7.2.0\\crtbegin.o" "-LC:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\7.2.0" "-LC:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\x86_64-w64-mingw32\\lib" "-LC:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\lib" "-LC:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\x86_64-w64-mingw32/sys-root/mingw/lib" "C:\\Users\\burito\\AppData\\Local\\Temp\\hello-d88ba4.o" -lmingw32 -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt "C:\\Program Files\\mingw-w64\\x86_64-7.2.0-posix-seh-rt_v5-rev0\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\7.2.0\\crtend.o"
C:\Users\burito>hello
Hello World!
C:\Users\burito>
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After installing the old version built with MinGW, which is 3.7.0 RC3, it worked.
You can notice the difference in the version of i686-pc-windows- gnu vs i686-pc-windows- msvc .
I think clang 3.9 will work too, as long as they don't break something in their source code, and if you build it yourself. It would be nice to have the newest 3.9 working with MinGW. I'm too lazy, although I try to create it myself.
EDIT: There are several packages for mingw too https://github.com/Alexpux/MINGW-packages that you can install with MSYS2 that seem to support clang. There are some commits related to 3.8 and 3.9.
Hope this helps someone with similar problems.
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