Problems compiling the GCC 4.3.5

[Paul van Hoven]

On my mac I need a certain version of the GCC other than the one that 
comes with XCode. Therefore I decided to compile a version for my mac. I 
downloaded mpfr and gmp and compiled those in order to get the 
compilation process for the gcc running. After that I did the following:

./configure --prefix=/Users/toom/gcc4.3.5/ 
--with-mpfr=/Users/toom/gcc4.3.5/requiredLibs/mpfr-3.0.0/ 
--with-gmp=/Users/toom/gcc4.3.5/requiredLibs/gmp-5.0.1/

Configure runs through without any problems so typed

make

After a while I get the following error message:

checking for suffix of object files... configure: error: cannot compute 
suffix of object files: cannot compile
See `config.log' for more details.
make[2]: *** [configure-stage1-target-libgcc] Error 1
make[1]: *** [stage1-bubble] Error 2
make: *** [all] Error 2

I had a look at config.log but I do not know what to look for. So I 
search the file for the word error and found the following logs
...
conftest.c:2: error: expected '=', ',', ';', 'asm' or '__attribute__' 
before 'me'
...
conftest.cc:13: error: 'exit' was not declared in this scope
...
conftest.cc:9: error: 'void std::exit(int)' should have been declared 
inside 'std'
...
/usr/include/stdlib.h:159: error: declaration of 'void std::exit(int)' 
throws different exceptions
...
conftest.cc:9: error: 'void std::exit(int)' should have been declared 
inside 'std'
...
/usr/include/stdlib.h:159: error: declaration of 'void exit(int)' throws 
different exceptions
conftest.cc:9: error: from previous declaration 'void exit(int) throw ()'

I'm not shure if these line represent the reason for the failing of 
compilation. Has anyone an idea what might go wrong here?