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Replace compiler's alignas/alignof extension by respective c++11 keywords when available. This also fix a compilation issue with gcc-4.7.

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This commit is contained in:
Gael Guennebaud
2019-01-11 17:10:54 +01:00
parent 89c4001d6f
commit 9005f0111f
3 changed files with 42 additions and 12 deletions
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7
Eigen/src/Core/util/ConfigureVectorization.h
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@@ -29,10 +29,15 @@
*
* If we made alignment depend on whether or not EIGEN_VECTORIZE is defined, it would be impossible to link
* vectorized and non-vectorized code.
*
* FIXME: this code can be cleaned up once we switch to proper C++11 only.
*/
#if (defined EIGEN_CUDACC)
#define EIGEN_ALIGN_TO_BOUNDARY(n) __align__(n)
#define EIGEN_ALIGNOF(x) __alignof(x)
#elif EIGEN_HAS_ALIGNAS
#define EIGEN_ALIGN_TO_BOUNDARY(n) alignas(n)
#define EIGEN_ALIGNOF(x) alignof(x)
#elif EIGEN_COMP_GNUC || EIGEN_COMP_PGI || EIGEN_COMP_IBM || EIGEN_COMP_ARM
#define EIGEN_ALIGN_TO_BOUNDARY(n) __attribute__((aligned(n)))
#define EIGEN_ALIGNOF(x) __alignof(x)
@@ -44,7 +49,7 @@
#define EIGEN_ALIGN_TO_BOUNDARY(n) __attribute__((aligned(n)))
#define EIGEN_ALIGNOF(x) __alignof(x)
#else
#error Please tell me what is the equivalent of __attribute__((aligned(n))) and __alignof(x) for your compiler
#error Please tell me what is the equivalent of alignas(n) and alignof(x) for your compiler
#endif
// If the user explicitly disable vectorization, then we also disable alignment