AC_TYPE_SIZE_T
AC_TYPE_UID_T
+LYX_CHECK_DEF(PATH_MAX, limits.h, [int n = PATH_MAX;])
+
AC_CHECK_FUNCS(chmod close _close fork getpid _getpid lstat mkfifo open _open pclose _pclose popen _popen readlink strerror)
# Check the form of mkdir()
AC_FUNC_MKDIR