(gl_FUNC_FTS): New file and macro.

m4/fts.m4

@@ -0,0 +1,38 @@
+# closeout.m4 serial 1
+dnl Copyright (C) 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.
+
+AC_DEFUN([gl_FUNC_FTS],
+[
+  AC_LIBSOURCES([fts.c, fts_.h])
+
+  dnl Use this version of fts unconditionally, since the GNU libc and
+  dnl NetBSD versions have bugs and/or unnecessary limitations.
+  AC_LIBOBJ([fts])
+
+  dnl Prerequisites of lib/fts.c.
+
+  # Checks for header files.
+  AC_HEADER_DIRENT
+  AC_HEADER_STDC
+  AC_CHECK_HEADERS([fcntl.h inttypes.h stddef.h stdint.h
+		    stdlib.h string.h sys/param.h unistd.h])
+
+  # Checks for typedefs, structures, and compiler characteristics.
+  AM_STDBOOL_H
+  AC_C_CONST
+  AC_TYPE_SIZE_T
+  AC_CHECK_TYPES([ptrdiff_t])
+  gt_INTTYPES_PRI
+
+  # Checks for library functions.
+  AC_FUNC_CLOSEDIR_VOID
+  AC_FUNC_LSTAT
+  AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK
+  AC_FUNC_MALLOC
+  AC_FUNC_REALLOC
+  AC_FUNC_STAT
+  AC_CHECK_FUNCS([fchdir memmove memset strrchr])
+])