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libstdc++: Fix unconditional definition of __cpp_lib_span in <version> [PR 97869} 

The <span> header is empty unless Concepts are supported, but <version>
defines the __cpp_lib_span feature test macro unconditionally. It should
be guarded by the same conditions as in <span>.

libstdc++-v3/ChangeLog:

	PR libstdc++/97869
	* include/precompiled/stdc++.h: Include <coroutine>.
	* include/std/version (__cpp_lib_span): Check __cpp_lib_concepts
	before defining.
This commit is contained in:
Jonathan Wakely 2020-11-17 15:26:29 +00:00
parent 1f8ac75991
commit ecf65330c1
2 changed files with 6 additions and 1 deletions
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3
libstdc++-v3/include/precompiled/stdc++.h
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@ -137,6 +137,9 @@
#include <bit>
#include <compare>
#include <concepts>
#if __cpp_impl_coroutine
# include <coroutine>
#endif
#include <numbers>
#include <ranges>
#include <span>

4
libstdc++-v3/include/std/version
View File

@ -226,7 +226,9 @@
# define __cpp_lib_ranges 201911L
#endif
#define __cpp_lib_shift 201806L
#define __cpp_lib_span 202002L
#if __cpp_lib_concepts
# define __cpp_lib_span 202002L
#endif
#define __cpp_lib_ssize 201902L
#define __cpp_lib_starts_ends_with 201711L
# if _GLIBCXX_USE_CXX11_ABI