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-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 */