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Diffstat (limited to 'm4/chdir-long.m4')
| -rw-r--r-- | m4/chdir-long.m4 | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/m4/chdir-long.m4 b/m4/chdir-long.m4 new file mode 100644 index 0000000..9e9e35f --- /dev/null +++ b/m4/chdir-long.m4 @@ -0,0 +1,42 @@ +#serial 5 + +# Use Gnulib's robust chdir function. +# It can handle arbitrarily long directory names, which means +# that when it is given the name of an existing directory, it +# never fails with ENAMETOOLONG. +# Arrange to compile chdir-long.c only on systems that define PATH_MAX. + +dnl Copyright (C) 2004, 2005 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. + +# Written by Jim Meyering. + +AC_DEFUN([gl_FUNC_CHDIR_LONG], +[ + AC_LIBSOURCES([chdir-long.c, chdir-long.h]) + AC_CACHE_CHECK([whether this system has a definition of PATH_MAX], + gl_have_path_max_definition, + [AC_EGREP_CPP([have_path_max_definition], + [#include <unistd.h> +#include <limits.h> +#ifdef PATH_MAX +have_path_max_definition +#endif], + gl_have_path_max_definition=yes, + gl_have_path_max_definition=no)]) + + if test $gl_have_path_max_definition; then + AC_LIBOBJ([chdir-long]) + gl_PREREQ_CHDIR_LONG + fi +]) + +AC_DEFUN([gl_PREREQ_CHDIR_LONG], +[ + AM_STDBOOL_H + gl_FUNC_MEMPCPY + gl_FUNC_OPENAT + gl_FUNC_MEMRCHR +]) |