Makefiles.am in lib/X11/nls are using $< in non-implicite rules. This is only supported by GNU make.
Created attachment 2755 [details] [review] Patch to use explicit dependencies
Yeah - this breaks Solaris make as well, but I hadn't gotten down to fixing it yet.
Committed.
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.