[cfe-dev] Clang on Windows targeting gcc requirements

Tue Jul 7 11:18:37 PDT 2015

Hi Martell,

Can you build the whole toolchain without any GNU stuff?
What replaces make, gprof, addr2line, c++filt? Is lldb working perfectly on
Windows/GNU?

Right now clang drops in the mingw chain which requires us to maintain
mingw compatibility, a task by itself.
Making and maintaining/owning a mingw-w64 toolchain distribution is much
larger undertaking and I don't have the time for it. I can review
additions/expansions/bug fixes to the mingw toolchain though.

Yaron

2015-07-07 20:51 GMT+03:00 Martell Malone <martellmalone at gmail.com>:

> Hey guys,
>
> Thanks for CC'ing me on this.
> I do remember a previous discussion on this issue with gcc where there are
> 3 possible combinations for locations of c++ includes.
> Hurcan I don't maintain the gcc packages for msys2 alexey does.
> He is currently looking at rebuilding to gcc 5.1
> If you create an issue there he might be able to change the paths of the
> package to match mingw-builds.
> If not I will update clang in the next msys2 package to handle the msys2
> layout
>
> A bit unrelated but still on topic of clang gcc I have build a
> fully independent clang toolchain for mingw-w64.
> What this mean by this is that we no longer require gcc.
>
> I patched the mingw-w64-crt to be buildable with clang and
> I patched the clang driver and got compiler-rt working for mingw-w64 along
> with libc++.
>
> I would prefer to move the package in the direction of defaulting to use
> compiler-rt and libc++ instead of libgcc and libstdc++
> I sent in the patches to llvm commits for the compiler-rt support but
> didn't get reply from anyone
>
> Yaron maybe you would be able to help me in getting this reviewed / merged
> All the patches are here
>
> https://github.com/Alexpux/MINGW-packages/tree/master/mingw-w64-clang-svn
>
> Kind Regards
> Martell
>

On Sun, Jul 5, 2015 at 6:30 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?
>>>
>>>
>>> _______________________________________________
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>>>
>>>
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>>>
>>
>
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