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authorFlorian Weimer <fweimer@redhat.com>2015-04-02 10:07:04 +0200
committerFlorian Weimer <fweimer@redhat.com>2015-04-02 19:55:21 +0200
commit37d60d970c342b7f21a173a363c8be6558ad6e6e (patch)
tree0ddd5469e71091ac033a1f64678a756c95c0e52c /include
parentb763f6ae859ecea70a5dacb8ad45c71d5f667e2e (diff)
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Define libc_max_align_t for internal use
Diffstat (limited to 'include')
-rw-r--r--include/libc-internal.h9
1 files changed, 9 insertions, 0 deletions
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  */