nixpkgs/pkgs/development/compilers/llvm/3.7/libc++/r242056.patch
Dmitry Kalinkin e9d60c5636
libc++3.7: fix to use with modern compilers
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
2016-12-30 16:16:14 -05:00

17 lines
528 B
Diff

--- 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);