Thanks again for your help - I will drop binutils, and use Apple's compilers to upgrade gcc from 4.7.2 (I want gnat, which Apple does not have). Concerning my experience with binutils: 1) It would have saved some time (yours and mine!) if the installation information had provided some details of targets with known problems - gcc seems clearer in this respect. 2) The messages from configure could be better. Not only did the warning appear only in the output to standard output/error and not in the config.log it generated (so would have scrolled off the screen unless they'd been redirected to a file), but the message "This configuration is not supported" did not define what was meant by "configuration". In this case it is the combination of target machine and OS version, but it might have meant inappropriate prerequisites like version of gcc and other necessary software. Thanks, Ellis On 9 Jun 2015, at 23:14, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > Looking back over some IRC logs from a couple of months ago I can > confirm that binutils doesn't work on darwin, you need to use Apple's > "cctools" for the assembler and linker,
