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mdbx++: refine MDBX_CXX01_CONSTEXPR for legacy compilers.

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Enable `constexpr` via `MDBX_CXX01_CONSTEXPR` if __cplusplus == 201103L but __cpp_constexpr is undefined.
This commit is contained in:
Leonid Yuriev 2021-11-06 17:39:55 +03:00
parent 710fc95d9a
commit 8870d33fcd
1 changed files with 3 additions and 2 deletions
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5
mdbx.h
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@ -393,7 +393,8 @@ typedef mode_t mdbx_mode_t;
#define MDBX_CXX01_CONSTEXPR __inline
#define MDBX_CXX01_CONSTEXPR_VAR const
#elif !defined(DOXYGEN) && \
(!defined(__cpp_constexpr) || __cpp_constexpr < 200704L || \
((__cplusplus < 201103L && defined(__cpp_constexpr) && \
__cpp_constexpr < 200704L) || \
(defined(__LCC__) && __LCC__ < 124) || \
(defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 407) && \
!defined(__clang__) && !defined(__LCC__)) || \
@ -410,7 +411,7 @@ typedef mode_t mdbx_mode_t;
#define MDBX_CXX11_CONSTEXPR __inline
#define MDBX_CXX11_CONSTEXPR_VAR const
#elif !defined(DOXYGEN) && \
(!defined(__cpp_constexpr) || __cpp_constexpr < 201304 || \
(!defined(__cpp_constexpr) || __cpp_constexpr < 201304L || \
(defined(__LCC__) && __LCC__ < 124) || \
(defined(__GNUC__) && __GNUC__ < 6 && !defined(__clang__) && \
!defined(__LCC__)) || \