[cfe-dev] Clang on Windows targeting gcc requirements

Yaron Keren yaron.keren at gmail.com
Mon Jul 6 11:56:04 PDT 2015 

Hurcan: added -pthread in r241485. Note that's -pthread not -pthreads. The
-pthreads option is hardly used in Tools.cpp, maybe it's depreciated.

2015-07-06 20:12 GMT+03:00 Hurcan Solter <hsolter at gmail.com>:

> I'd even prefer a negatory option something in the vein of no-pthreads
> but I think -pthreads would do for now.
>

On Sun, Jul 5, 2015 at 7:54 PM, Yaron Keren <yaron.keren at gmail.com> wrote:

> Yes, I commented it out due to mingw.org not having libpthread.
>
> Anyhow, the other drivers in Tools.cpp usually add pthread conditionally:
>
>     if (Args.hasArg(options::OPT_pthread))
>       CmdArgs.push_back("-lpthread");
>
> would it make sense to do the same for mingw?
>
>
> 2015-07-05 18:59 GMT+03:00 Hurcan Solter <hsolter at gmail.com>:
>
>> Thanks, it seems to be working. I've noticed something else alltogether
>> when testing that pthreads are not linked
>> by default.There is a FIXME in Tools.cpp and the code is commented out. I
>> don't think there is anyone using gcc
>> without c++11 std::thread support. I think it should be enabled by
>> default.
>>
>>
>>
> On Sun, Jul 5, 2015 at 8:30 AM, Yaron Keren <yaron.keren at gmail.com> wrote:
>
>> The attached patch should fix that, please let me know if it works for
>> you.
>>
>>
>>
>> 2015-07-05 0:33 GMT+03:00 Hurcan Solter <hsolter at gmail.com>:
>>
>>> Yes, upon further inspection, aforementioned patch explicitly adds the
>>> directories in MinGW::AddClangCXXStdlibIncludeArgs()
>>> which is distinctly different than mingw-builds.
>>> With MSYS2 C++ include directories is kept in
>>> /mingw64/include/c++/${gccver} whereas with mingw-builds
>>> /mingw64/x86_64-w64-mingw32/include/c++
>>> is where they are.
>>>
>>> Old patch is removed from the MSYS2 packages and a new one is introduced
>>> after this update but unfortunately it does not handle
>>> the changes. ( I've added the maintainer of clang at MSYS2 in this
>>> conversation).
>>>
>>> MSYS2 is damn great and convenient to use. I'd very much like to see
>>> recent version of clang is usable without problems again.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>> On Sat, Jul 4, 2015 at 6:40 PM, Yaron Keren <yaron.keren at gmail.com>
>> wrote:
>>
>>> Hi Hurcan,
>>>
>>> clang support the mingw-builds and mingw.org directory structure.
>>> With the msys2 build, the problem is the missing C++ include directories?
>>>
>>> Yaron
>>>
>>>
>>> 2015-07-04 16:41 GMT+03:00 Hurcan Solter <hsolter at gmail.com>:
>>>
>>>> I've used to build clang on MSYS2 with older version of this patch at
>>>> https://github.com/Alexpux/MINGW-packages/blob/master/mingw-w64-clang/clang-mingw-driver.patch
>>>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_Alexpux_MINGW-2Dpackages_blob_master_mingw-2Dw64-2Dclang_clang-2Dmingw-2Ddriver.patch&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=Ix-0aW1nGYMxzuqzb9pdVofsl42YNYgvP3nfa6Vzf8E&e=>
>>>> and it served me well. this new patch not so much.Below the relevant dumps ;
>>>>
>>>> $ g++ -E -x c++ - -v < /dev/null
>>>> Using built-in specs.
>>>> COLLECT_GCC=C:\msys2_64\mingw64\bin\g++.exe
>>>> Target: x86_64-w64-mingw32
>>>> Configured with: ../gcc-4.9.2/configure --prefix=/mingw64
>>>> --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32
>>>> --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32
>>>> --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include
>>>> --libexecdir=/mingw64/lib --with-gxx-include-dir=/mingw64/include/c++/4.9.2
>>>> --enable-bootstrap --with-arch=x86-64 --with-tune=generic
>>>> --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada --enable-shared
>>>> --enable-static --enable-libatomic --enable-threads=posix --enable-graphite
>>>> --enable-fully-dynamic-string --enable-libstdcxx-time=yes
>>>> --disable-libstdcxx-pch --disable-libstdcxx-debug
>>>> --enable-cloog-backend=isl --enable-version-specific-runtime-libs
>>>> --disable-cloog-version-check --disable-isl-version-check --enable-lto
>>>> --enable-libgomp --disable-multilib --enable-checking=release
>>>> --disable-rpath --disable-win32-registry --disable-nls --disable-werror
>>>> --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64
>>>> --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64
>>>> --with-cloog=/mingw64 --with-pkgversion='Rev5, Built by MSYS2 project'
>>>> --with-bugurl=http://sourceforge.net/projects/msys2
>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__sourceforge.net_projects_msys2&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=qxch1gn6dUS6rczZ8OX27JDQX2SAixXM5TJTJug9FhI&e=>
>>>> --with-gnu-as --with-gnu-ld
>>>> Thread model: posix
>>>> gcc version 4.9.2 (Rev5, Built by MSYS2 project)
>>>> COLLECT_GCC_OPTIONS='-E' '-v' '-shared-libgcc' '-mtune=generic'
>>>> '-march=x86-64'
>>>>  C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/cc1plus.exe
>>>> -E -quiet -v -iprefix
>>>> C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/ -D_REENTRANT -
>>>> -mtune=generic -march=x86-64
>>>> # 1 "<stdin>"
>>>> # 1 "<built-in>"
>>>> # 1 "<command-line>"
>>>> # 1 "<stdin>"
>>>> ignoring duplicate directory
>>>> "C:/msys2_64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.9.2/include"
>>>> ignoring nonexistent directory "C:/msys64/mingw64/include"
>>>> ignoring nonexistent directory "/mingw64/include"
>>>> ignoring duplicate directory
>>>> "C:/msys2_64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.9.2/include-fixed"
>>>> ignoring duplicate directory
>>>> "C:/msys2_64/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.9.2/../../../../x86_64-w64-mingw32/include"
>>>> ignoring nonexistent directory
>>>> "C:/msys64/mingw64/x86_64-w64-mingw32/include"
>>>> #include "..." search starts here:
>>>> #include <...> search starts here:
>>>>  C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/include
>>>>
>>>>  C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/../../../../include
>>>>
>>>>  C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/include-fixed
>>>>
>>>>  C:/msys2_64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/../../../../x86_64-w64-mingw32/include
>>>>  C:/msys2_64/mingw64/lib/gcc/../../include/c++/4.9.2
>>>>  C:/msys2_64/mingw64/lib/gcc/../../include/c++/4.9.2/x86_64-w64-mingw32
>>>>  C:/msys2_64/mingw64/lib/gcc/../../include/c++/4.9.2/backward
>>>>
>>>>
>>>> Built with the older MSYS2 patch ;
>>>> $ clang++ -E -x c++ - -v < /dev/null
>>>> clang version 3.7.0 (http://llvm.org/git/clang.git
>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_git_clang.git&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=pPjfizf2zAebxGKdA0tfJNJMfhG4rOM7lwPnfPMa14Q&e=>
>>>> e7cee814a12b5dd16c8672543fd93efe741d5208) (http://llvm.org/git/llvm.git
>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_git_llvm.git&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=nrLEvIb_FdlnMl1MALmnNd72UDSWQ11U46obfWTKRRA&e=>
>>>> d594ba081506f0f57e9801e3f81467b1766b1e04)
>>>> Target: x86_64-pc-windows-gnu
>>>> Thread model: posix
>>>>  "C:\\msys2_64\\mingw64\\bin\\clang++.exe" -cc1 -triple
>>>> x86_64-pc-windows-gnu -E -disable-free -disable-llvm-verifier
>>>> -main-file-name - -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
>>>> -fno-unique-section-names -resource-dir
>>>> "C:\\msys2_64\\mingw64\\bin\\..\\lib\\clang\\3.7.0" -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../include/c++/4.9.2" -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../include/c++/4.9.2/x86_64-w64-mingw32"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../include/c++/4.9.2/backward"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../x86_64-w64-mingw32/include/c++"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../x86_64-w64-mingw32/include/c++/backward"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin\\..\\lib\\clang\\3.7.0\\include"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\bin/../x86_64-w64-mingw32/include"
>>>> -internal-isystem "C:\\msys2_64\\mingw64\\bin/../include"
>>>> -fdeprecated-macro -fdebug-compilation-dir "E:\\llvm\\buildmingw64\\bin"
>>>> -ferror-limit 19 -fmessage-length 0 -mstackrealign -fno-use-cxa-atexit
>>>> -fobjc-runtime=gcc -fcxx-exceptions -fexceptions -fdiagnostics-show-option
>>>> -o - -x c++ -
>>>> clang -cc1 version 3.7.0 based upon LLVM 3.7.0svn default target
>>>> x86_64-pc-windows-gnu
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\bin/../x86_64-w64-mingw32/include/c++"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\bin/../x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\bin/../x86_64-w64-mingw32/include/c++/backward"
>>>> ignoring duplicate directory
>>>> "C:\msys2_64\mingw64\bin\..\lib\clang\3.7.0\include"
>>>> #include "..." search starts here:
>>>> #include <...> search starts here:
>>>>  C:\msys2_64\mingw64\bin/../include/c++/4.9.2
>>>>  C:\msys2_64\mingw64\bin/../include/c++/4.9.2/x86_64-w64-mingw32
>>>>  C:\msys2_64\mingw64\bin/../include/c++/4.9.2/backward
>>>>  C:\msys2_64\mingw64\bin\..\lib\clang\3.7.0\include
>>>>  C:\msys2_64\mingw64\bin/../x86_64-w64-mingw32/include
>>>>  C:\msys2_64\mingw64\bin/../include
>>>> End of search list.
>>>> New Patch
>>>> $ ./clang++ -E -x c++ - -v < /dev/null
>>>> clang version 3.7.0 (http://llvm.org/git/clang.git
>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_git_clang.git&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=pPjfizf2zAebxGKdA0tfJNJMfhG4rOM7lwPnfPMa14Q&e=>
>>>> 0af047c817acbc67e61aa82f0b43a54d61b753f8) (http://llvm.org/git/llvm.git
>>>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__llvm.org_git_llvm.git&d=AwMFaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=CnzuN65ENJ1H9py9XLiRvC_UQz6u3oG6GUNn7_wosSM&m=r3JtGknlg70px5yvRWhv1Zl7r4WNJKqtaJd9HISLW8E&s=nrLEvIb_FdlnMl1MALmnNd72UDSWQ11U46obfWTKRRA&e=>
>>>> 9a9ee6f550c0789053c260203aea8430a34554fe)
>>>> Target: x86_64-pc-windows-gnu
>>>> Thread model: posix
>>>>  "E:\\llvm\\buildmingw64\\bin\\clang++.exe" -cc1 -triple
>>>> x86_64-pc-windows-gnu -E -disable-free -disable-llvm-verifier
>>>> -main-file-name - -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
>>>> -resource-dir "E:\\llvm\\buildmingw64\\bin\\..\\lib\\clang\\3.7.0"
>>>> -internal-isystem "C:\\msys2_64\\mingw64\\x86_64-w64-mingw32\\include\\c++"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\x86_64-w64-mingw32\\include\\c++\\x86_64-w64-mingw32\\"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\x86_64-w64-mingw32\\include\\c++\\backward"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\4.9.2\\include\\c++"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\4.9.2\\include\\c++\\x86_64-w64-mingw32\\"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\4.9.2\\include\\c++\\backward"
>>>> -internal-isystem
>>>> "E:\\llvm\\buildmingw64\\bin\\..\\lib\\clang\\3.7.0\\include"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\4.9.2\\include"
>>>> -internal-isystem
>>>> "C:\\msys2_64\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\4.9.2\\include-fixed"
>>>> -internal-isystem "C:\\msys2_64\\mingw64\\x86_64-w64-mingw32\\include"
>>>> -internal-isystem "C:\\msys2_64\\mingw64\\include" -fdeprecated-macro
>>>> -fdebug-compilation-dir "E:\\llvm\\buildmingw64\\bin" -ferror-limit 19
>>>> -fmessage-length 0 -mstackrealign -fno-use-cxa-atexit -fobjc-runtime=gcc
>>>> -fcxx-exceptions -fexceptions -fdiagnostics-show-option -o - -x c++ -
>>>> clang -cc1 version 3.7.0 based upon LLVM 3.7.0svn default target
>>>> x86_64-pc-windows-gnu
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\x86_64-w64-mingw32\include\c++"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\x86_64-w64-mingw32\include\c++\x86_64-w64-mingw32\"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\x86_64-w64-mingw32\include\c++\backward"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\x86_64-w64-mingw32\"
>>>> ignoring nonexistent directory
>>>> "C:\msys2_64\mingw64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\backward"
>>>> #include "..." search starts here:
>>>> #include <...> search starts here:
>>>>  E:\llvm\buildmingw64\bin\..\lib\clang\3.7.0\include
>>>>  C:\msys2_64\mingw64\lib\gcc\x86_64-w64-mingw32\4.9.2\include
>>>>  C:\msys2_64\mingw64\lib\gcc\x86_64-w64-mingw32\4.9.2\include-fixed
>>>>  C:\msys2_64\mingw64\x86_64-w64-mingw32\include
>>>>  C:\msys2_64\mingw64\include
>>>> End of search list.
>>>>
>>>> I assume this patch only meant to fix the official mingw-builds?
>>>>
>>>>
>>>> _______________________________________________
>>>>> cfe-dev mailing list
>>>>> cfe-dev at cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>>>
>>>>
>>>>
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>>>> cfe-dev mailing list
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>>>> http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>>>>
>>>>
>>>
>>
>
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