1#serial 5 2 3# Use Gnulib's robust chdir function. 4# It can handle arbitrarily long directory names, which means 5# that when it is given the name of an existing directory, it 6# never fails with ENAMETOOLONG. 7# Arrange to compile chdir-long.c only on systems that define PATH_MAX. 8 9dnl Copyright (C) 2004, 2005 Free Software Foundation, Inc. 10dnl This file is free software; the Free Software Foundation 11dnl gives unlimited permission to copy and/or distribute it, 12dnl with or without modifications, as long as this notice is preserved. 13 14# Written by Jim Meyering. 15 16AC_DEFUN([gl_FUNC_CHDIR_LONG], 17[ 18 AC_LIBSOURCES([chdir-long.c, chdir-long.h]) 19 AC_CACHE_CHECK([whether this system has a definition of PATH_MAX], 20 gl_cv_have_path_max_definition, 21 [AC_EGREP_CPP([have_path_max_definition], 22 [#include <unistd.h> 23#include <limits.h> 24#ifdef PATH_MAX 25have_path_max_definition 26#endif], 27 gl_cv_have_path_max_definition=yes, 28 gl_cv_have_path_max_definition=no)]) 29 30 if test $gl_cv_have_path_max_definition; then 31 AC_LIBOBJ([chdir-long]) 32 gl_PREREQ_CHDIR_LONG 33 fi 34]) 35 36AC_DEFUN([gl_PREREQ_CHDIR_LONG], 37[ 38 AM_STDBOOL_H 39 gl_FUNC_MEMPCPY 40 gl_FUNC_OPENAT 41 gl_FUNC_MEMRCHR 42]) 43