From 37d60d970c342b7f21a173a363c8be6558ad6e6e Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Thu, 2 Apr 2015 10:07:04 +0200 Subject: Define libc_max_align_t for internal use --- ChangeLog | 4 ++++ include/libc-internal.h | 9 +++++++++ 2 files changed, 13 insertions(+) diff --git a/ChangeLog b/ChangeLog index 2a7f505a10..9bac2983e4 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,7 @@ +2015-04-02 Florian Weimer + + * include/libc-internal.h (libc_max_align_t): Define. + 2015-04-02 Andreas Schwab [BZ #16850] diff --git a/include/libc-internal.h b/include/libc-internal.h index bca59a4614..b37388ecd7 100644 --- a/include/libc-internal.h +++ b/include/libc-internal.h @@ -107,4 +107,13 @@ extern void __init_misc (int, char **, char **); #define DIAG_IGNORE_NEEDS_COMMENT(version, option) \ _Pragma (_DIAG_STR (GCC diagnostic ignored option)) +/* This mirrors the C11 max_align_t type provided by GCC, but it is + also available in C99 mode. The aligned attributes are required + because some ABIs have reduced alignment requirements for struct + and union members. */ +typedef struct { + long long ll __attribute__ ((__aligned__ (__alignof__ (long long)))); + long double ld __attribute__ ((__aligned__ (__alignof__ (long double)))); +} libc_max_align_t; + #endif /* _LIBC_INTERNAL */ -- cgit v1.2.3