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Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin

From: Jonathan Wakely <jwakely at redhat dot com>
To: Christophe Lyon <christophe dot lyon at linaro dot org>
Cc: Jennifer Yao <jenny dot hyphen dot fa at gmail dot com>, "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 16:32:23 +0000
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>

On 14/11/15 09:37 +0100, Christophe Lyon wrote:

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(),
                              ^


This shouldn't be possible unless you're using --enable-cheaders=c
because we have an autoconf test for wcstoll, and if it's found then
it should get added to namespace std by <cwchar>.

Could you let me know the output of:

grep C_INCLUDE_DIR /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/Makefile

Or alternatively:

ls -l /tmp/9122162_8.tmpdir/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64_be-none-elf/gcc3/aarch64_be-none-elf/libstdc++-v3/include/cwchar

Follow-Ups:
- Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
  - From: Christophe Lyon

References:
- Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
  - From: Jonathan Wakely
- Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
  - From: Jonathan Wakely
- Re: [PATCH] Enable libstdc++ numeric conversions on Cygwin
  - From: Christophe Lyon

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