The first thing to check: What
 

The first thing to check: What does 'which g++' tell you? I suspect: nothing (because the second to last line of your output says that g++ is not found).

The best way to check what is wrong (or what are the correct settings for WM_COMPILER_DIR): try 'echo $WM_PROJECT_INST_DIR/$WM_ARCH/gcc-4.1.0$WM_COMPILER_ARCH' (or whatever you're setting this to) and see if the result looks sensible. If it does try 'ls $WM_PROJECT_INST_DIR/$WM_ARCH/gcc-4.1.0$WM_COMPILER_ARCH': this should give you the listing of a directory with a bin, a lib and several other subdirectories. If it doesn't WM_COMPILER_DIR points nowhere and you should try to adapt it.

(One question before I go: you installed the special gcc that has to be downloaded separatly as described in the readme, didn't you?)

Sorry,I didn't translate these
 

Sorry,I didn't translate these lines:

make: No se hace nada para `allFiles'. (make: nothing is done for 'allFiles')
make: `Make/linuxGcc4DPOpt/dependencies' está actualizado. (make: `Make/linuxGcc4DPOpt/dependencies' it's updated)

I've donwloaded the files from the download page, and install openFOAM the usual way. First time i have so many errors (after running foamInstTest) but also, first time that i try to compile.
Now i'm on Win and not able to change to suse, so first chance i get, i'll check the readme and try your sugestion.

Thanks Bernhard