I get these errors when runing ruby1.9 configure as recommended on the Gridflow website:

...
[gcc64] GNU C++ in 64-bit mode: ----------------------------------------------> missing (runtime error)
[libruby] Ruby as a dynamic library: -----------------------------------------> missing (gcc: error: 'rb_rescue' was not declared in this scope)
[librubystatic] Ruby as a static library: ------------------------------------> missing (gcc: error: 'rb_rescue' was not declared in this scope)
...
[objcpp] GNU/Apple ObjectiveC++ Compiler: ------------------------------------> missing (where is objc/Object.h ?)
[quartz] Apple Quartz/Cocoa Display: -----------------------------------------> disabled (would need objcpp)
...
[mpeg3] HeroineWarrior LibMPEG3 <libmpeg3/libmpeg3.h>: -----------------------> missing (where is libmpeg3/libmpeg3.h ?)
[mpeg3] HeroineWarrior LibMPEG3 <libmpeg3.h>: --------------------------------> found
[quicktimeapple] Apple's QuickTime: ------------------------------------------> missing (gcc compilation error)
...
[puredata] PureData (or DesireData): -----------------------------------------> disabled (would need libruby or librubystatic)
[desiredata] DesireData: -----------------------------------------------------> missing (gcc: error: 'gobj_subscribe' was not declared in this scope)
[gem09] PureData GEM (source code) with m_holdname: --------------------------> disabled (would need puredata)
[gem08] PureData GEM (source code) without m_holdname: -----------------------> disabled (would need puredata)
...


I have installed both libruby1.8 and libruby1.9 and thieir dev packages. What do I need to do to make it compile?
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