On Jan 28, 2011, at 4:38 PM, Joshua Root wrote:
> On 2011-1-29 10:49 , James Gregurich wrote: >>>> for the record, the precise definition of my terms are.... >>>> >>>> host = system with dev tools that builds the product >>>> target = system upon which the product executes. > > In the autotools world these are the --build and --host options > respectively. There's also --target which is used when you're building a > compiler. yes. I'm aware that these terms are used in their own way in the autoconf world. That's why I defined my terms. > > Looking back through the thread, I don't see an explanation of why you > need to figure out the build system's triplet yourself. Configure > scripts will typically come with a copy of config.guess and figure it > out on their own. How would config.guess know what the target hardware/os is for an iOS device given it doesn't run on the iOS device? building icu for iOS requires that you pass --host=arm-apple-darwin to the configure script. > It should also be noted that build systems that handle cross compiling > correctly are actually not too common (even among the ones that use > autotools). > > - Josh well, I see no reason why macports couldn't be used for cross compiling in general. However, each port will have to customized to handle cross compiling. I had to add custom steps to the icu portfile. For ports that I need for my work, I can certainly supply the needed portfile changes. It may be possible for someone who knows more about the internals of macports than I do to actually rework the mechanism so that changes to portfiles will be minimal, but my goal was just to get something working. I had a large enough learning curve without trying to get too fancy. However, the approach I took should not break existing ports....they simply won't build for iOS because they will be depending on variables that are configured for the host. _______________________________________________ macports-dev mailing list [email protected] http://lists.macosforge.org/mailman/listinfo.cgi/macports-dev
