some observations on the build process

hi,

when building pike 7.6 from cvs i noticed a few things that could be improved:

after configure a summary of what was detected is shown. but when you just run make as suggested then you never see that summary because it gets buried in the compile outbut following it. hence it would be nice to show that summary after a complete make run as well.

after finding that a lot of libs were missing to build GL and all that i found that after installing them neither make force_autoconfig nor make force_configure not even make clean would do anything to update the findings.

i had to remove the whole build tree to get the new libs detected.

greetings, martin.