Mercurial > gnulib
view m4/imaxdiv.m4 @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Sat, 09 Mar 2019 20:32:25 +0100 |
| parents | b06060465f09 |
| children |
line wrap: on
line source
# imaxdiv.m4 serial 5 dnl Copyright (C) 2006, 2009-2019 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_FUNC_IMAXDIV], [ AC_REQUIRE([gl_INTTYPES_H_DEFAULTS]) dnl On OSF/1 5.1 with cc, this function is declared but not defined. AC_CHECK_FUNCS_ONCE([imaxdiv]) AC_CHECK_DECLS_ONCE([imaxdiv]) if test "$ac_cv_have_decl_imaxdiv" != yes; then HAVE_DECL_IMAXDIV=0 fi AC_CACHE_CHECK([whether <inttypes.h> defines imaxdiv_t], [gl_cv_type_imaxdiv_t], [dnl Assume that if imaxdiv is declared, imaxdiv_t is defined. if test $ac_cv_have_decl_imaxdiv = yes; then gl_cv_type_imaxdiv_t=yes else AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( [[#include <inttypes.h> imaxdiv_t x; ]]) ], [gl_cv_type_imaxdiv_t=yes], [gl_cv_type_imaxdiv_t=no]) fi ]) if test $gl_cv_type_imaxdiv_t = no; then HAVE_IMAXDIV_T=0 fi ]) # Prerequisites of lib/imaxdiv.c. AC_DEFUN([gl_PREREQ_IMAXDIV], [:])