Fix alignment portability problems

Do not assume that the natural alignment of Lisp objects is a
multiple of GCALIGNMENT.  This improves on the portability of the
recent fix for Bug#29040.
* lib-src/make-docfile.c (close_emacs_globals):
* src/buffer.c (buffer_defaults, buffer_local_symbols):
* src/lisp.h (DEFUN):
* src/thread.c (main_thread):
Use GCALIGNED, not alignas (GCALIGNMENT).
* src/alloc.c (COMMON_MULTIPLE):
Move back here from lisp.h, since it is no longer used elsewhere.
* src/lisp.h (GCALIGNMENT): No longer a macro, since we need not
worry about MSVC.  Omit no-longer-needed consistency check.
* src/thread.c (THREAD_ALIGNMENT): Remove.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib-src/make-docfile.c b/lib-src/make-docfile.c
index 69c7f37a17a..0ea3f7b6b6a 100644
--- a/lib-src/make-docfile.c
+++ b/lib-src/make-docfile.c
@@ -668,7 +668,7 @@ close_emacs_globals (ptrdiff_t num_symbols)
            "extern\n"
            "#endif\n"
            "struct {\n"
-           "  struct Lisp_Symbol alignas (GCALIGNMENT) s;\n"
+           "  struct Lisp_Symbol GCALIGNED s;\n"
            "} lispsym[%td];\n"),
           num_symbols);
 }