'configure'ing gnuplot 4.0.0 on hpux 11.11.. Hope this is useful.
checking sys/socket.h presence... yes configure: WARNING: sys/socket.h: present but cannot be compiled configure: WARNING: sys/socket.h: check for missing prerequisite headers? configure: WARNING: sys/socket.h: proceeding with the preprocessor's result configure: WARNING: ## ------------------------------------ ## configure: WARNING: ## Report this to [EMAIL PROTECTED] ## configure: WARNING: ## ------------------------------------ ## checking for sys/socket.h... yes -M