Perry Smith wrote: > I tried just copying over the AIX header files and using the Mac > compiler but I run off into the weeds. I'm guessing that the Mac > compiler has a different set of predefines. I tried to specify the > AIX predefines by looking at the output with -v set but I'm still not > able to compile. I have -nostdinc set and a few -I<dir> options set > along with a couple of -Uxxx to take out what the Mac compiler > defines and a couple -Dxxx to add in what the AIX compiler defines. > It still isn't working. That's a bad idea, and I don't expect it would ever work right. An ABI is a lot more than just defines. > So, then I thought I would try to compile gcc using the cross > compiler options using the Mac as the host and AIX as the target. I > get up to where it tries to build libstdc++ and then the configure > script stops with "undefined host/target combination". I've loaded > binutils on the Mac, compiled with AIX as the target as well. Still > no go. This should work fine. It would help if you specified more details, e.g. what was the exact configure command and target specification did you use? From looking at gcc-testresults it looks like you want "powerpc-ibm-aix5.3.0.0", but the output of config.guess on the system ought to tell you what to use. Note that you will need your cross-binutils already installed and in the path if you want to build any of the target libraries (libgcc, libstdc++, libgfortran, libgcj, etc.) But at that point, the compiler itself has already been built, so if you want to use it for compiling only and not linking then it should be sufficient. I think the make target is all-gcc to build just gcc and no target libraries. However since your goal is to verify code when not online then you ought to actually build a working cross-toolchain and link the output binary, since that will catch a lot of bugs that just compiling would not. By the time you have a working cross-binutils and cross-gcc getting the target libraries cross compiled should be pretty simple, assuming that you've copied over the system headers into $prefix/$target/include and startup objects into $prefix/$target/lib. Brian
