Hi there.
I've got this message when I configured php for my SunOS 5.8 with server iPlanet4.1
Configuring SAPI modules
checking for AOLserver support... no
checking for Apache 1.x module support via DSO through APXS... no
checking for Apache 1.x module support... no
checking for member fd in BUFF *... no
checking for mod_charset compatibility option... no
checking for Apache 2.0 module support via DSO through APXS... no
checking for Apache 2.0 handler-module support via DSO through APXS... no
checking for Caudium support... no
checking for CLI build... yes
checking for embedded SAPI library support... no
checking for Zeus ISAPI support... no
checking for NSAPI support... //mySERVERpath
checking for NSAPI include files... iPlanet/4.x style
checking //mySERVERpath/plugins/include/nsapi.h usability... no
checking //mySERVERpath/plugins/include/nsapi.h presence... yes
configure: WARNING: //mySERVERpath/plugins/include/nsapi.h: present but cannot be compiled
configure: WARNING: //mySERVERpath/plugins/include/nsapi.h: check for missing prerequisite headers?
configure: WARNING: //mySERVERpath/plugins/include/nsapi.h: proceeding with the preprocessor's result
configure: WARNING: ## ------------------------------------ ##
configure: WARNING: ## Report this to
address@hidden. ##
configure: WARNING: ## ------------------------------------ ##
checking for //mySERVERpath/plugins/include/nsapi.h... yes
checking for PHTTPD support... no
checking for Pi3Web support... no
checking for Roxen/Pike support... no
checking for Servlet support... no
checking for thttpd... no
checking for TUX... no
checking for webjames... no
checking for chosen SAPI module... nsapi