[
AC_LIBSOURCES([getcwd.c, getcwd.h])
- AC_CHECK_HEADERS_ONCE(unistd.h)
AC_CACHE_CHECK([whether getcwd (NULL, 0) allocates memory for result],
[gl_cv_func_getcwd_null],
[AC_TRY_RUN(
[
# include <stdlib.h>
-# ifdef HAVE_UNISTD_H
-# include <unistd.h>
-# endif
+# include <unistd.h>
# ifndef getcwd
char *getcwd ();
# endif