[fpc-devel] Porting FPC to IBM zArch

[Sven Barth]

Am 25.07.2013 15:12, schrieb Mark Morgan Lloyd:
> Sven Barth wrote:
>> Am 25.07.2013 12:10, schrieb Mark Morgan Lloyd:
>>> Sven Barth wrote:
>>>> On 24.07.2013 16:36, Bernd Oppolzer wrote:
>>>>> Then I built the RTL for linux, which also worked successfully, as 
>>>>> far
>>>>> as I saw,
>>>>> but when compiling with -Tlinux, I now get the following message:
>>>>
>>>> How did you build it? Building the RTL for Linux should be 
>>>> (assuming that your FPC source is at c:\fpc)
>>>>
>>>> cd c:\fpc
>>>> make crossall CPU_TARGET=i386 OS_TARGET=linux 
>>>> CROSSBINDIR=C:\path\to\linux\binutils BINUTILSPREFIX=i386-linux-
>>>>
>>>> BINUTILSPREFIX could also be something different or empty (then the 
>>>> option should be "BINUTILSPREFIX="), it depends on how your 
>>>> assembler/linker for Linux is prefixed.
>>>>
>>>> Once that worked you can install the compiler using
>>>>
>>>> make crossinstall CPU_TARGET=i386 OS_TARGET=linux 
>>>> INSTALL_PREFIX=c:\wherever\fpc\should\be\installed
>>>
>>> Is it possible to "ask" the makefile for the true names of the 
>>> supported targets?
>>>
>> Huh? What do you mean with "true names" and "supported targets"?
>
> You're telling him that it's possible to build using 
> ...CPU_TARGET=i386 OS_TARGET=linux but where do those come from? 
> Without being told by a developer or without referring to fully 
> updated documentation, how does somebody know to use "i386" rather 
> than "x86", or whether it should be "mips" or "mipseb"?
He/she doesn't know. Simple as that. If you want to build for a 
different target than your host one you should inform yourself anyway, 
because there are only very few combinations (i386-win32 -> 
x86_64-win64, i386-* -> i386-nativent, x86_64-linux -> i386-linux on 
multilib systems) which work out of the box. For everything else you 
need binutils, sometimes libraries, etc.
> I can see that there's a MAKEFILETARGETS list in the makefile, which 
> obviously goes slightly further than I'm asking in that it shows the 
> valid combinations (i.e. somebody trying to build for powerpc + os2 is 
> severely out of luck). But something like a "targets" target would be 
> useful.
>
Well... open a feature request...

Regards,
Sven