+2017-08-04 Paul Eggert <eggert@cs.ucla.edu>
+
+ manywarnings: port to 64-bit GCC builds of Emacs
+ * m4/manywarnings.m4 (gl_MANYWARN_ALL_GCC): Compute max safe
+ object size rather than hardwiring 2147483647. This is needed to
+ build GNU Emacs, which has one conditional (and used
+ only-in-theory) call to malloc with a literal greater than
+ 2147483647.
+
2017-08-04 Bruno Haible <bruno@clisp.org>
Relax the license of some modules with no runtime code.
-# manywarnings.m4 serial 9
+# manywarnings.m4 serial 10
dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
# gcc --help=warnings outputs an unusual form for these options; list
# them here so that the above 'comm' command doesn't report a false match.
- # Would prefer "min (PTRDIFF_MAX, SIZE_MAX)", but it must be a literal:
- ptrdiff_max_min=2147483647
- gl_manywarn_set="$gl_manywarn_set -Walloc-size-larger-than=$ptrdiff_max_min"
+ # Would prefer "min (PTRDIFF_MAX, SIZE_MAX)", but it must be a literal
+ # and AC_COMPUTE_INT requires it to fit in a long:
+ AC_MSG_CHECKING([max safe object size])
+ AC_COMPUTE_INT([gl_alloc_max],
+ [(LONG_MAX < PTRDIFF_MAX ? LONG_MAX : PTRDIFF_MAX) < (size_t) -1
+ ? (LONG_MAX < PTRDIFF_MAX ? LONG_MAX : PTRDIFF_MAX)
+ : (size_t) -1],
+ [[#include <limits.h>
+ #include <stddef.h>
+ #include <stdint.h>
+ ]],
+ [gl_alloc_max=2147483647])
+ AC_MSG_RESULT([$gl_alloc_max])
+ gl_manywarn_set="$gl_manywarn_set -Walloc-size-larger-than=$gl_alloc_max"
gl_manywarn_set="$gl_manywarn_set -Warray-bounds=2"
gl_manywarn_set="$gl_manywarn_set -Wformat-overflow=2"
gl_manywarn_set="$gl_manywarn_set -Wformat-truncation=2"