diff options
Diffstat (limited to 'gnulib-m4/memchr.m4')
| -rw-r--r-- | gnulib-m4/memchr.m4 | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/gnulib-m4/memchr.m4 b/gnulib-m4/memchr.m4 index 1194bac2..ab773b81 100644 --- a/gnulib-m4/memchr.m4 +++ b/gnulib-m4/memchr.m4 @@ -1,5 +1,5 @@ -# memchr.m4 serial 7 -dnl Copyright (C) 2002, 2003, 2004, 2009 Free Software Foundation, Inc. +# memchr.m4 serial 8 +dnl Copyright (C) 2002-2004, 2009-2010 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. @@ -13,12 +13,7 @@ AC_DEFUN_ONCE([gl_FUNC_MEMCHR], dnl These days, we assume memchr is present. But just in case... AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) - AC_REPLACE_FUNCS([memchr]) - if test $ac_cv_func_memchr = no; then - gl_PREREQ_MEMCHR - REPLACE_MEMCHR=1 - fi - + AC_CHECK_FUNCS_ONCE([memchr]) if test $ac_cv_func_memchr = yes; then # Detect platform-specific bugs in some versions of glibc: # memchr should not dereference anything with length 0 @@ -53,11 +48,11 @@ AC_DEFUN_ONCE([gl_FUNC_MEMCHR], { int pagesize = getpagesize (); char *two_pages = - (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE, - flags, fd, 0); + (char *) mmap (NULL, 2 * pagesize, PROT_READ | PROT_WRITE, + flags, fd, 0); if (two_pages != (char *)(-1) - && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0) - fence = two_pages + pagesize; + && mprotect (two_pages + pagesize, pagesize, PROT_NONE) == 0) + fence = two_pages + pagesize; } #endif if (fence) @@ -73,10 +68,14 @@ AC_DEFUN_ONCE([gl_FUNC_MEMCHR], [dnl Be pessimistic for now. gl_cv_func_memchr_works="guessing no"])]) if test "$gl_cv_func_memchr_works" != yes; then - gl_PREREQ_MEMCHR REPLACE_MEMCHR=1 - AC_LIBOBJ([memchr]) fi + else + HAVE_MEMCHR=0 + fi + if test $HAVE_MEMCHR = 0 || test $REPLACE_MEMCHR = 1; then + AC_LIBOBJ([memchr]) + gl_PREREQ_MEMCHR fi ]) |