AC_PATH_PROG

[Mattias Brändström]

Hello!

If I have something like this in my configure.ac:

AC_PATH_PROG(SED, sed)
AC_ARG_VAR(SED, [path to sed])

Now everything works fine when sed is in my PATH, but I would like for
./configure to fail if sed isn't in my PATH. Is there a standard way to do
this? I haven't found any.

If someone here has any pointers I would really appriciate it!

:.:: mattias