diff options
| author | Peter Eisentraut <peter@eisentraut.org> | 2026-01-25 11:16:58 +0100 |
|---|---|---|
| committer | Peter Eisentraut <peter@eisentraut.org> | 2026-01-25 11:32:47 +0100 |
| commit | a9bdb63bba8a631cd4797393307eecf5fcde9167 (patch) | |
| tree | 07488960d3584717859d7acfe1d4922a363a6859 /src | |
| parent | 72e3abd082c3ae6db4081137a7431fdd05e55d73 (diff) | |
Work around buggy alignas in older g++
Older g++ (<9.3) mishandle the alignas specifier (raise warnings that
the alignment is too large), but the more or less equivalent attribute
works. So as a workaround, #define alignas to that attribute for
those versions.
see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89357>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/3119480.1769189606%40sss.pgh.pa.us
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/c.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h index c0be07a4566..17afaef9a6a 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -263,6 +263,16 @@ #endif /* + * alignas is buggy in g++ < 9, but the more or less equivalent attribute + * works. + * + * <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89357> + */ +#if defined(__cplusplus) && defined(__GNUC__) && !defined(__clang__) && __GNUC__ < 9 +#define alignas(a) __attribute__((aligned(a))) +#endif + +/* * Use "pg_attribute_always_inline" in place of "inline" for functions that * we wish to force inlining of, even when the compiler's heuristics would * choose not to. But, if possible, don't force inlining in unoptimized |