Trouble building Rgraphviz: Tiger, cc_dynamic

Seth,

I'm running a built from source R 2.2 (devel) on Tiger.  When I try  
to install Rgraphviz, I get this when it tries to link the  
Rgraphviz.so:

Where and how did you configure R? It seems as if you configured R in  
Panther or mixed gcc3 and gcc4 - neither is a good idea.

In Panther there is only gcc3 so cc_dynamic is always needed.  
However, if you upgrade such system to Tiger, cc_dynamic is removed  
by default so won't be able to compile packages anymore. You'll need  
to patch configured R files or re-configure/compile R for Tiger.

In Tiger there is gcc3 and gcc4:
- If you use g77 then you must use gcc3 and cc_dynamic is needed  
(what Bill was mentioning is that using CC=gcc-3.3 is not sufficient,  
you must also run gcc_select 3.3).
- If you use gcc4  and gfortran then cc_dynamic is not needed.

Since you seem to use both /sw and /usr/local there may be even some  
conflict of the compilers you use - you should check the compiler  
within R to make sure you have compatible versions.

For the CRAN binary we exploit the fact that cc_dynamic is static, so  
once linked into libR it's not needed anymore. Install script swaps  
Makevars and SHLIB for Tiger to remove -lcc_dynamic from the flags  
even though gcc3 is used. This allows us to compile packages with  
gcc3 even if gcc4 is selected.

Cheers,
Simon

gcc -bundle -flat_namespace -undefined suppress -L/sw/lib -L/usr/ 
local/lib -o Rgraphviz.so Rgraphviz.o RgraphvizInit.o -L/usr/local/ 
lib/graphviz -ldotneato -lm -lcc_dynamic -L/Users/Shared/builds/ 
rpat/lib -lR
/usr/bin/ld: can't locate file for: -lcc_dynamic
collect2: ld returned 1 exit status
make: *** [Rgraphviz.so] Error 1