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[PATCH] Fix std::codecvt_utf8<wchar_t> for Mingw

From: Jonathan Wakely <jwakely at redhat dot com>
To: libstdc++ at gcc dot gnu dot org, gcc-patches at gcc dot gnu dot org
Date: Sat, 19 May 2018 03:03:33 +0100
Subject: [PATCH] Fix std::codecvt_utf8<wchar_t> for Mingw

While testing a series of patches to add Mingw support for
std::filesystem I discovered that codecvt_utf8<wchar_t> was producing
wchar_t values with the wrong endianness. This fixes it.

	* src/c++11/codecvt.cc (__codecvt_utf8_base<wchar_t>::do_in)
	[__SIZEOF_WCHAR_T__==2 && __BYTE_ORDER__!=__ORDER_BIG_ENDIAN__]: Set
	little_endian element in bitmask.
	* testsuite/22_locale/codecvt/codecvt_utf8/69703.cc: Run all tests.
	* testsuite/22_locale/codecvt/codecvt_utf8/wchar_t/1.cc: New.

Tested powerpc64le-linux and x86_64-w64-mingw32, committed to trunk.

I think I'll backport this too, as it only affects Mingw.

Attachment: patch.txt
Description: Text document

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