The specific paths are configurable, so it depends on how you install the new compiler. See https://wiki.freepascal.org/Cross_compiling#From_macOS_(Darwin) for typical folder structure on a Mac.
On Sun, Aug 30, 2026 at 10:08 PM Stephen Holland <[email protected]> wrote: > Thank you for the reply. I gather that since I will specify architecture > that as a result of this process I will have a compiler that targets my OS > on the desktop and I have the additional AVR target available with just the > compiler directives. > > Is there documentation on where the subdirectories go so I can check on > the install having gone well? > > I’ll try the install, check the -i option on fpc to see if it thinks it > did the install and report back. > > Steve > > On Aug 30, 2026, at 10:12 AM, Christo Crause <[email protected]> > wrote: > > > A good starting point: https://wiki.freepascal.org/AVR > > Typically you need to use make and ensure you have the cross binutils for > the target system available already. If you want to compile for avr64du32 > then specify SUBARCH=avrxmega2 as part of the make parameters. Note that > the makefile only builds one subarch at a time and by default put the > compiled units in folders without a subarch differentiator. > > Maybe the easiest option if you are new to fpc and cross compiling is to > use the fpcupdeluxe tool to help configure and maintain lazarus and/or fpc > for various different targets (especially if one isn't familiar with > fiddling with the compiler's configuration file): > https://github.com/LongDirtyAnimAlf/fpcupdeluxe. There is a very long > help thread for fpcupdeluxe here: > https://forum.lazarus.freepascal.org/index.php/topic,34645.0.html > > In general you need a cross compiler per CPU target, so you need a native > compiler for the host and then a cross compiler for say AVR. MSP430 is not > supported by fpc. > > Once the cross compiler is installed correctly, compile as follows > (minimum command line options, assumes that binutils and RTL are in known > to the compiler locations).: > $ fpc -Tembedded -Pavr -Wpavr64du32 hello.pas > > Please ask if you run into issues (this is almost guaranteed if it is your > first time trying to build a cross compiler from fpc's development > branch). Good luck! > >
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