[fpc-devel] AArch64 -> ARM cross compilation
pascaldragon at googlemail.com
Sat Nov 14 17:07:32 CET 2020
Am 14.11.2020 um 15:12 schrieb J. Gareth Moreton via fpc-devel:
> Hi everyone,
> I need a little bit of assistance so I can stamp out these bugs for you.
> As silly as this sounds, I've mislaid my Arm-32 SD card so I have to develop on AArch64 exclusively on the Raspberry Pi. As a result I only have the AArch64 implementation of FPC installed. Is there a way to cross-
> compile AArch64 to Arm, or better, install an Arm version of FPC alongside my AArch64 version? I gather it's not quite as simple as running i386 on x86_64. Admittedly my expertise with Linux is still lacking a bit,
> especially when it comes to getting the right software installed.
> Gareth aka. Kit
> P.S. Trying to run "make clean all CPU_TARGET=arm" doesn't seem to work properly - gcc returns errors (doesn't recognise "-m64") and CPU_TARGET seems to get reset back to aarch64.
> P.P.S. If I find my Arm-32 SD card again, I'll probably switch back to that for the testing and debugging.
You need to install arm-linux binutils (don't know what the package is
called) and then you need to invoke make like this:
make all CPU_TARGET=arm BINUTILSPREFIX=arm-linux- FPMAKEOPT="-T 4" -j 4
Note 1: don't use "clean" and "all" together with parallel compilation
(the "-j 4")
Note 2: your prefix might be different, e.g. arm-linux-gnueabi- or
something like that. Best try to execute as/ld using tab completion in
In theory it should also be possible to run 32-bit ARM applications on
AArch64 though I have not tested that yet.
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