[Rivet] pkgpath

[James Monk]

Hi Andy,

I haven't installed the newest Fastjet yet and so Rivet configuration  
should fail for me (since I have fastjet-config in /usr/local/bin),  
but it doesn't and I get a compiler error instead.  In order to use  
fastjet-config to determine the fastjet version the path to fastjet  
must be set.

It looks to me like the package path for fastjet isn't getting set,  
but it is still building because it is in a standard location.  If I  
add AC_MSG_NOTICE([$FASTJETPATH]) immediately after the  
AC_CEDAR_LIBRARYANDHEADERS call for fastjet (configure.ac:78) then I  
get a blank line, same as if I add AC_MSG_NOTICE([$pkgpath]) to the  
end of AC_CEDAR_LIBRARYANDHEADERS (pkgchecks.m4:94).

This makes me wonder if pkgpath is getting set at all.  Can anyone  
more expert than me in autotools comment?

cheers,

James