solaris configure strangness

[Shachar Shemesh]

Hi list.

Due to seeing other people looking at it, I decided to try and compile 
WINE on solaris 2.8 sparc. During configure I get the following messages:

checking for ar... ar
configure: WARNING: X11/XKBlib.h: present but cannot be compiled
configure: WARNING: X11/XKBlib.h: check for missing prerequisite headers?
configure: WARNING: X11/XKBlib.h: proceeding with the preprocessor's result
configure: WARNING: XShape extension not found, Wine will be built 
without it
configure: WARNING: DGA extension not found, Wine will be built without it
configure: WARNING: XFree86 VMODE extension not found, Wine will be 
built without it
configure: WARNING: XVideo extension not found, Wine will be built 
without it
configure: WARNING: net/if.h: present but cannot be compiled
configure: WARNING: net/if.h: check for missing prerequisite headers?
configure: WARNING: net/if.h: proceeding with the preprocessor's result
configure: WARNING: netinet/ip.h: present but cannot be compiled
configure: WARNING: netinet/ip.h: check for missing prerequisite headers?
configure: WARNING: netinet/ip.h: proceeding with the preprocessor's result
configure: WARNING: resolv.h: present but cannot be compiled
configure: WARNING: resolv.h: check for missing prerequisite headers?
configure: WARNING: resolv.h: proceeding with the preprocessor's result
...

However, when finally done:
checking X11/XKBlib.h usability... no
checking X11/XKBlib.h presence... yes
checking for X11/XKBlib.h... yes

checking net/if.h usability... no
checking net/if.h presence... yes
checking for net/if.h... yes

checking netinet/ip.h usability... no
checking netinet/ip.h presence... yes
checking for netinet/ip.h... yes

checking resolv.h usability... no
checking resolv.h presence... yes
checking for resolv.h... yes

Can anyone explain what this means?

                    Shachar