Mercurial > hg > octave-jordi > gnulib-hg
view m4/sysexits.m4 @ 15426:60c6b6da0198
ffs: avoid undefined behavior
* lib/ffs.c (ffs): Provide fallback for non-32-bit int.
* tests/test-ffs.c (naive, main): Avoid signed shifts.
Reported by Bruno Haible.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
---|---|
date | Fri, 15 Jul 2011 14:26:43 -0600 |
parents | 662ae53d8d37 |
children | 8250f2777afc |
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# sysexits.m4 serial 6 dnl Copyright (C) 2003, 2005, 2007, 2009-2011 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_SYSEXITS], [ AC_CHECK_HEADERS_ONCE([sysexits.h]) if test $ac_cv_header_sysexits_h = yes; then HAVE_SYSEXITS_H=1 gl_CHECK_NEXT_HEADERS([sysexits.h]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sysexits.h>]], [[switch (0) { case EX_OK: case EX_USAGE: case EX_DATAERR: case EX_NOINPUT: case EX_NOUSER: case EX_NOHOST: case EX_UNAVAILABLE: case EX_SOFTWARE: case EX_OSERR: case EX_OSFILE: case EX_CANTCREAT: case EX_IOERR: case EX_TEMPFAIL: case EX_PROTOCOL: case EX_NOPERM: case EX_CONFIG: break; } ]])], [SYSEXITS_H=], [SYSEXITS_H=sysexits.h]) else HAVE_SYSEXITS_H=0 SYSEXITS_H=sysexits.h fi AC_SUBST([HAVE_SYSEXITS_H]) AC_SUBST([SYSEXITS_H]) AM_CONDITIONAL([GL_GENERATE_SYSEXITS_H], [test -n "$SYSEXITS_H"]) ])