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| author | Eric Blake <ebb9@byu.net> | 2009-03-21 17:57:40 -0600 |
|---|---|---|
| committer | Eric Blake <ebb9@byu.net> | 2009-03-23 04:55:12 -0600 |
| commit | bde8c798d44b81439cc2701ae74d39727fe7c105 (patch) | |
| tree | bc9f43d25f6db1548121f814e0c4d95cba475742 /lib/signal.in.h | |
| parent | 7f4b1f45ce477f8374d382bd75f5f0a7e865e2c6 (diff) | |
| download | gnulib-bde8c798d44b81439cc2701ae74d39727fe7c105.tar.gz | |
signal.h: always support 'volatile sig_atomic_t'
* m4/signal_h.m4 (gl_SIGNAL_H): Check for AIX limitation.
(gl_SIGNAL_H_DEFAULTS): Add a default.
* modules/signal (Makefile.am): Substitute if needed.
* lib/signal.in.h (sig_atomic_t): Redefine if needed, so that
users can blindly add volatile.
* doc/posix-headers/signal.texi (signal.h): Document it.
Reported by Matthew Woehlke.
Signed-off-by: Eric Blake <ebb9@byu.net>
Diffstat (limited to 'lib/signal.in.h')
| -rw-r--r-- | lib/signal.in.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/lib/signal.in.h b/lib/signal.in.h index 3c74fd8d4a..5c42fe9e26 100644 --- a/lib/signal.in.h +++ b/lib/signal.in.h @@ -1,6 +1,6 @@ /* A GNU-like <signal.h>. - Copyright (C) 2006-2008 Free Software Foundation, Inc. + Copyright (C) 2006-2009 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -41,6 +41,15 @@ Also, mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */ #include <sys/types.h> +/* On AIX, sig_atomic_t already includes volatile. C99 requires that + 'volatile sig_atomic_t' ignore the extra modifier, but C89 did not. + Hence, redefine this to a non-volatile type as needed. */ +#if ! @HAVE_TYPE_VOLATILE_SIG_ATOMIC_T@ +typedef int rpl_sig_atomic_t; +# undef sig_atomic_t +# define sig_atomic_t rpl_sig_atomic_t +#endif + #ifdef __cplusplus extern "C" { #endif |