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Re: [PATCH] PR libstdc++/78870 support std::filesystem on Windows


On Sat, 16 Jun 2018 at 14:06, Jonathan Wakely <jwakely.gcc@gmail.com> wrote:

>
>
> On Sat, 16 Jun 2018 at 02:04, Sandra Loosemore <sandra@codesourcery.com>
> wrote:
>
>> On 05/31/2018 01:19 PM, Jonathan Wakely wrote:
>> > This adds incomplete but functional support for std::filesystem and
>> > std::experimental::filesystem on MinGW. In theory there should be no
>> > changes to the existing behaviour for POSIX targets from this patch,
>> > as all the various bugs I found while working on this have already
>> > been fixed in separate patches.
>> >
>> > Tested powerpc64le-linux, and x86_64-w64-mingw32 (with a few expected
>> > FAILures on mingw-w64). Committed to trunk.
>>
>> As noted in the issue (comment #16) 2 weeks ago already, this patch
>> breaks libstdc++ configure on bare-metal targets.
>>
>> configure:80055: checking for link
>> configure:80055: error: Link tests are not allowed after
>> GCC_NO_EXECUTABLES.
>>
>> Please fix?  It's blocking other people from testing unrelated patches
>> on mainline.
>>
>>
>
> I'm not the only person able to make changes to autoconf files (and
> already said I didn't know how to fix this).
>
> I have a patch to replace the AC_CHECK_FUNCS line with
> GLIBCXX_COMPILE_OR_LINK tests inside GLIBCXX_CHECK_FILESYSTEM_DEPS which
> should work, I'll finish testing it when I get home this evening.
>
>
I can't build aarch64-none-elf even before my commit, so I also can't test
a fix.

checking for shl_load... configure: error: Link tests are not allowed after
GCC_NO_EXECUTABLES.


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