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Compiler.h: add macro GCC_OLDER_THAN()

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This commit is contained in:
Max Kellermann 2014-11-28 18:57:48 +01:00
parent 92eeca3ba7
commit 0964b06240
2 changed files with 12 additions and 4 deletions
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12
src/Compiler.h
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@ -31,13 +31,21 @@
#define GCC_CHECK_VERSION(major, minor) \
(defined(__GNUC__) && GCC_VERSION >= GCC_MAKE_VERSION(major, minor, 0))
/**
* Are we building with gcc (not clang or any other compiler) and a
* version older than the specified one?
*/
#define GCC_OLDER_THAN(major, minor) \
(defined(__GNUC__) && !defined(__clang__) && \
GCC_VERSION < GCC_MAKE_VERSION(major, minor, 0))
#ifdef __clang__
# define CLANG_VERSION GCC_MAKE_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__)
# if __clang_major__ < 3
# error Sorry, your clang version is too old. You need at least version 3.1.
# endif
#elif defined(__GNUC__)
# if !GCC_CHECK_VERSION(4,6)
# if GCC_OLDER_THAN(4,6)
# error Sorry, your gcc version is too old. You need at least version 4.6.
# endif
#else
@ -138,7 +146,7 @@
#if defined(__cplusplus)
/* support for C++11 "override" was added in gcc 4.7 */
#if !defined(__clang__) && !GCC_CHECK_VERSION(4,7)
#if GCC_OLDER_THAN(4,7)
#define override
#define final
#endif

4
src/util/Manual.hxx
View File

@ -35,7 +35,7 @@
#include <new>
#include <utility>
#if !defined(__clang__) && __GNUC__ && !GCC_CHECK_VERSION(4,8)
#if GCC_OLDER_THAN(4,8)
#include <type_traits>
#endif
@ -54,7 +54,7 @@
*/
template<class T>
class Manual {
#if !defined(__clang__) && __GNUC__ && !GCC_CHECK_VERSION(4,8)
#if GCC_OLDER_THAN(4,8)
/* no alignas() on gcc < 4.8: apply worst-case fallback */
__attribute__((aligned(8)))
#else