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Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
- From: Jennifer Yao <jenny dot hyphen dot fa at gmail dot com>
- To: Jonathan Wakely <jwakely at redhat dot com>
- Cc: Christophe Lyon <christophe dot lyon at linaro dot org>, "libstdc++ at gcc dot gnu dot org" <libstdc++ at gcc dot gnu dot org>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Andreas Tobler <andreast-list at fgznet dot ch>
- Date: Sat, 14 Nov 2015 16:23:37 -0500
- Subject: Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
- Authentication-results: sourceware.org; auth=none
- References: <CAPQfdh=Kshcq=Eg5EV9rpho=Q0USrGgODPoLzSLuvK+5D6LGeA at mail dot gmail dot com> <CAPQfdhmMGJeb-tq29jTheoo5jUaeiFzcycWFTrpShRE-kPftGw at mail dot gmail dot com> <CAPQfdh=uOjLzi60Dnd0Dd1ycJUDqMWQBCv1aRAGBP97DSUS3+Q at mail dot gmail dot com> <20151112114049 dot GY2937 at redhat dot com> <20151112133947 dot GA2937 at redhat dot com> <20151113145219 dot GQ2937 at redhat dot com> <CAKdteObx+-EmP+zeF8vp3diy7Y_52eR+=9H4=kNowJAa=ZnoCA at mail dot gmail dot com> <20151114135804 dot GC2937 at redhat dot com>
> Hi, this commit makes the GCC build to fail for targets using newlib
> (I tested arm-none-eabi and aarch64-none-elf)
>
> I'm seeing errors such as:
> In file included from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/string:52:0,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/bits/locale_classes.h:40,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/bits/ios_base.h:41,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/ios:42,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/istream:38,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/sstream:38,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/complex:45,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/ccomplex:38,
> from
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/sources/gcc-fsf/gccsrc/libstdc++-v3/include/precompiled/stdc++.h:52:
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/bits/basic_string.h:
> In function 'long long int std::__cxx11::stoll(const wstring&,
> std::size_t*, int)':
> /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/bits/basic_string.h:5524:31:
> error: 'wcstoll' is not a member of 'std'
> { return __gnu_cxx::__stoa(&std::wcstoll, "stoll", __str.c_str(),
> ^
> Sorry I can't provide more details until Monday.
I just finished running the testsuite on x86_64-pc-cygwin for
Jonathan's latest patch and compared the results against an older
(about two months old) run, and so far I'm not seeing any regressions.
Granted, this is strictly preliminary; I'm currently re-running the
testsuite on the up-to-date, unpatched build tree to see if there are
any differences. I'll update when I have more information.