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libc++3.7: fix to use with modern compilers

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Modern compiler will issue a following error whenever '#include <string>'
is done:

/nix/store/yxpwamjdapjcp53mmsdh1j2c9bc26h4k-libc++-3.7.1/include/c++/v1/string:1938:44:
error: 'basic_string<_CharT, _Traits, _Allocator>' is missing exception specification 'noexcept(is_nothrow_copy_constructible<allocator_type>::value)'
basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a)
                                           ^
/nix/store/yxpwamjdapjcp53mmsdh1j2c9bc26h4k-libc++-3.7.1/include/c++/v1/string:1326:40:
note: previous declaration is here
    _LIBCPP_INLINE_VISIBILITY explicit basic_string(const allocator_type& __a)
                                       ^
1 error generated.

This happens because modern clang is more strict about checking
exception specification for forward declaration and definition.

http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/string?r1=242056&r2=242623&diff_format=h
This commit is contained in:
Dmitry Kalinkin 2016-12-30 15:58:03 -05:00
parent 2cac374241
commit e9d60c5636
No known key found for this signature in database
GPG key ID: 5157B3EC8B2CA333
2 changed files with 20 additions and 1 deletions
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5
pkgs/development/compilers/llvm/3.7/libc++/default.nix
View file

@ -14,7 +14,10 @@ stdenv.mkDerivation rec {
cmakeFlagsArray=($cmakeFlagsArray -DLIBCXX_CXX_ABI_INCLUDE_PATHS="$NIX_BUILD_TOP/libcxxabi-${version}.src/include")
'';
patches = [ ./darwin.patch ];
patches = [
./darwin.patch
./r242056.patch
];
buildInputs = [ cmake libcxxabi ] ++ lib.optional stdenv.isDarwin fixDarwinDylibNames;

16
pkgs/development/compilers/llvm/3.7/libc++/r242056.patch Normal file
View file

@ -0,0 +1,16 @@
--- a/include/string 2015/07/13 20:04:56 242056
+++ b/include/string 2015/07/18 20:40:46 242623
@@ -1936,7 +1936,12 @@
template <class _CharT, class _Traits, class _Allocator>
inline _LIBCPP_INLINE_VISIBILITY
basic_string<_CharT, _Traits, _Allocator>::basic_string(const allocator_type& __a)
- : __r_(__a)
+#if _LIBCPP_STD_VER <= 14
+ _NOEXCEPT_(is_nothrow_copy_constructible<allocator_type>::value)
+#else
+ _NOEXCEPT
+#endif
+: __r_(__a)
{
#if _LIBCPP_DEBUG_LEVEL >= 2
__get_db()->__insert_c(this);