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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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# byteswap.m4 serial 4
dnl Copyright (C) 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.

dnl Written by Oskar Liljeblad.

AC_DEFUN([gl_BYTESWAP],
[
  dnl Prerequisites of lib/byteswap.in.h.
  AC_CHECK_HEADERS([byteswap.h], [
    BYTESWAP_H=''
  ], [
    BYTESWAP_H='byteswap.h'
  ])
  AC_SUBST([BYTESWAP_H])
  AM_CONDITIONAL([GL_GENERATE_BYTESWAP_H], [test -n "$BYTESWAP_H"])
])