Ah, from your paste, it looks like mingw-w64 and clang are fighting to
declare a lot of builtins when -fms-extensions is turned on.
I would personally prefer to use compiler implementations of these
things instead of header file implementations, so I think that
mingw-w64 should try to support clan
You are right David and now I remember the thing about ms-extensions.
Declspec was part of those extensions and enabling it by default caused
errors with specific code so declspec was changed to general attribute
instead.
Since I have clang git build (trying to upstream some patches used by
MSYS2),
I can confirm that MSYS2's x86_64 clang++ compiler does not support
__popcnt but does support __builtin_popcount. I looked into it a
little bit, and found out that the clang commit that adds the __popcnt
builtins is very recent (September 2016). I seems like it has not
made it into a release yet.
Opps, gmail put output into quote. Improved version:
$ clang++ popcnt.cc -std=c++14 -fms-extensions
popcnt.cc:9:26: error: use of undeclared identifier '__popcnt16'
unsigned short usr = __popcnt16(us[i]);
^
popcnt.cc:17:24: error: use of undeclared identifier '__popcnt'
I think ms-extensions was made default option for mingw and msvc clang and
codegen is used only for creating msvc libs. Here is Clang output anyway:
$ clang++ popcnt.cc -std=c++14 -fms-extensions
popcnt.cc:9:26: error: use of undeclared identifier '__popcnt16'
unsigned short usr = __popcnt16(u
Mateusz, thanks for looking in to this.
Here are the relevant lines from the clang source code that indicate
that it supports those builtins:
https://github.com/llvm-mirror/clang/blob/3e45634a7f951c2306e4b368f9fb8c8d80c48273/include/clang/Basic/Builtins.def#L760-L762
https://github.com/llvm-mirro
Hi Jacek,
Now it is OK. Thanks!
Mateusz
W dniu 2017-02-08 o 18:53, Jacek Caban pisze:
> Hi Mateusz,
>
> Thanks for the notice. I just pushed a fix, please retest.
>
> Jacek
>
> On 08.02.2017 18:06, Mateusz wrote:
>> Hi!
>>
>> After last update by Jonathan Yong [5c7bc5] I can't compile cross-c
MSYS2 native Clang test-popcnt.cpp:
$ clang++ popcnt.cc -std=c++14
popcnt.cc:9:26: error: use of undeclared identifier '__popcnt16'
unsigned short usr = __popcnt16(us[i]);
^
popcnt.cc:17:24: error: use of undeclared identifier '__popcnt'
unsigned int uir = __popcnt
Hi Mateusz,
Thanks for the notice. I just pushed a fix, please retest.
Jacek
On 08.02.2017 18:06, Mateusz wrote:
> Hi!
>
> After last update by Jonathan Yong [5c7bc5] I can't compile cross-compiler
> (on Ubuntu).
>
> The error message (for 64-bit cross-compiler):
> /home/ma/m/cross/bin/x86_64-w
Hello. This patch adds support for the Microsoft __popcnt16, __popcnt, and
__popcnt64 intrinsics, which are documented here:
https://msdn.microsoft.com/en-us/library/bb385231.aspx
I was trying to compile ANGLE recently and one of the first errors I
encountered was due to both GCC/mingw-w64 not
Hi!
After last update by Jonathan Yong [5c7bc5] I can't compile cross-compiler (on
Ubuntu).
The error message (for 64-bit cross-compiler):
/home/ma/m/cross/bin/x86_64-w64-mingw32-gcc -DHAVE_CONFIG_H -I.
-I/home/ma/m/source/mingw-w64-v5/mingw-w64-crt -m64
-I/home/ma/m/target/x86_64-w64-mingw32
On 8 February 2017 at 02:55, Liu Hao wrote:
> On 2017/2/8 1:45, Ricardo Constantino wrote:
> > Should be fixed with
> > https://github.com/Alexpux/MINGW-packages/commit/ba282a67e, but I
> thought
> > someone would've reported it to upstream by now?
> Probably you could comment this PR
> https://g
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