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| author | Bruno Haible <bruno@clisp.org> | 2020-08-09 15:58:10 +0200 |
|---|---|---|
| committer | Bruno Haible <bruno@clisp.org> | 2020-08-09 15:58:10 +0200 |
| commit | 57caf9541d98314102a55dd1cd0b8dc2be747471 (patch) | |
| tree | 4ce7a17a15154f0f84398b7df3313e2126ead326 /lib/alignof.h | |
| parent | cae4fcab00ff89a5271376aed615cfa8c067fca2 (diff) | |
| download | gnulib-57caf9541d98314102a55dd1cd0b8dc2be747471.tar.gz | |
Use __alignof__ with clang.
* m4/stddef_h.m4 (gl_STDDEF_H): Test the alignment of max_align_t also
on clang.
* lib/alignof.h (alignof_type): Use __alignof__ also on clang.
* lib/stdalign.in.h (_Alignof): Don't activate the GCC workaround on
clang.
* lib/malloca.h (sa_alignof): Use __alignof__ also on clang.
* lib/bitset/list.c (lbitset_elt_alloc): Use __alignof__ also on clang.
* lib/bitset/table.c (tbitset_elt_alloc): Likewise.
* tests/test-stddef.c: Very the behaviour of __alignof__ also on clang.
Diffstat (limited to 'lib/alignof.h')
| -rw-r--r-- | lib/alignof.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/alignof.h b/lib/alignof.h index c72e914406..3a8d8d2343 100644 --- a/lib/alignof.h +++ b/lib/alignof.h @@ -36,12 +36,14 @@ /* alignof_type (TYPE) Determine the good alignment of an object of the given type at compile time. Note that this is not necessarily the same as alignof_slot(type). - For example, with GNU C on x86 platforms: alignof_type(double) = 8, but + For example, with GNU C on x86 platforms and with clang on Linux/x86: + alignof_type(long long) = 8, but alignof_slot(long long) = 4. + And alignof_type(double) = 8, but - when -malign-double is not specified: alignof_slot(double) = 4, - when -malign-double is specified: alignof_slot(double) = 8. Note: The result cannot be used as a value for an 'enum' constant, due to bugs in HP-UX 10.20 cc and AIX 3.2.5 xlc. */ -#if defined __GNUC__ || defined __IBM__ALIGNOF__ +#if defined __GNUC__ || defined __clang__ || defined __IBM__ALIGNOF__ # define alignof_type __alignof__ #else # define alignof_type alignof_slot |