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authorYuuki Harano <masm+github@masm11.me>2021-01-30 23:37:19 +0900
committerYuuki Harano <masm+github@masm11.me>2021-01-30 23:37:19 +0900
commit50c76b844bc79309b4f5d9e28a2386b9a6f735b7 (patch)
tree29f8273d8afccae1f16b723c36548cee150cb0bc /lib/stddef.in.h
parent563a0d94c379292bd88e83f18560ed21c497cea9 (diff)
parent96f20120c97a0a329fff81a0cc3747082a8a2c55 (diff)
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Merge branch 'master' of git.sv.gnu.org:/srv/git/emacs into feature/pgtk
Diffstat (limited to 'lib/stddef.in.h')
-rw-r--r--lib/stddef.in.h23
1 files changed, 21 insertions, 2 deletions
diff --git a/lib/stddef.in.h b/lib/stddef.in.h
index ba7195a9102..0f506a5b18b 100644
--- a/lib/stddef.in.h
+++ b/lib/stddef.in.h
@@ -49,6 +49,23 @@
# ifndef _@GUARD_PREFIX@_STDDEF_H
+/* On AIX 7.2, with xlc in 64-bit mode, <stddef.h> defines max_align_t to a
+ type with alignment 4, but 'long' has alignment 8. */
+# if defined _AIX && defined _ARCH_PPC64
+# if !GNULIB_defined_max_align_t
+# ifdef _MAX_ALIGN_T
+/* /usr/include/stddef.h has already defined max_align_t. Override it. */
+typedef long rpl_max_align_t;
+# define max_align_t rpl_max_align_t
+# else
+/* Prevent /usr/include/stddef.h from defining max_align_t. */
+typedef long max_align_t;
+# define _MAX_ALIGN_T
+# endif
+# define GNULIB_defined_max_align_t 1
+# endif
+# endif
+
/* The include_next requires a split double-inclusion guard. */
# @INCLUDE_NEXT@ @NEXT_STDDEF_H@
@@ -86,8 +103,10 @@
we are currently compiling with gcc.
On MSVC, max_align_t is defined only in C++ mode, after <cstddef> was
included. Its definition is good since it has an alignment of 8 (on x86
- and x86_64). */
-#if defined _MSC_VER && defined __cplusplus
+ and x86_64).
+ Similarly on OS/2 kLIBC. */
+#if (defined _MSC_VER || (defined __KLIBC__ && !defined __LIBCN__)) \
+ && defined __cplusplus
# include <cstddef>
#else
# if ! (@HAVE_MAX_ALIGN_T@ || defined _GCC_MAX_ALIGN_T)