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add a simple sizeof checker to compare nim & c types

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This commit is contained in:
Jacek Sieka 2016-11-03 21:11:39 +08:00
commit be1e3c4e09
2 changed files with 12 additions and 1 deletions
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8
lib/nimbase.h
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@ -459,3 +459,11 @@ typedef int Nim_and_C_compiler_disagree_on_target_architecture[sizeof(NI) == siz
#elif defined(__FreeBSD__)
# include <sys/types.h>
#endif
/* Compile with -t:-DNIM_CHECK_ABI to enable */
#ifdef NIM_CHECK_ABI
# define NIM_CHECK_SIZE(typ, sz) \
_Static_assert(sizeof(typ) == sz, "Nim & C disagree on type size")
#else
# define NIM_CHECK_SIZE(typ, sz)
#endif