[M3devel] more cm3cg on Raspberry Pi

[mika at async.caltech.edu]

The gain would be that I could compile my whole tree of non-CM3 software
(which is a fair fraction of the size of the CM3 tree), as well as the
CM3 tree itself, with both compilers without having to clean everything
and start over in between.  On a slow machine it can make a difference.
But sure in the long run I'd probably stick with one or the other, and I
suspect most people would do too.  On the other hand, for as long as there's
debug work going on on either or both of the compilers in question it seems
it would be helpful to be able to have both.  And yes I get that they
would have to be installed in different places.  But they wouldn't be able
to step on each other's toes if the derived directories were named differently...

Well not a big deal, really.  I now tar and rm and untar to switch.

Jay K writes:
>Yes=2C maybe. But the C backend works for everything.=0A=
>We'd have to double the number of targets=2C for little gain.=0A=
>=0A=
>You can't install both to the same root either way.=0A=
>The pkg directories are separate=2C but bin and lib are not.=0A=
>=0A=
>Upgrade.py from on to the other should work asis.=0A=
>=0A=
>=A0- Jay=0A=
>=0A=
>----------------------------------------=0A=
>> To: jay.krell at cornell.edu=0A=
>> CC: m3devel at elegosoft.com=0A=
>> Subject: Re: more cm3cg on Raspberry Pi=0A=
>> Date: Sat=2C 19 Oct 2013 12:21:35 -0700=0A=
>> From: mika at async.caltech.edu=0A=
>>=0A=
>> Hi Jay=2C=0A=
>>=0A=
>> Yes the C backend is certainly convenient and cool. No argument there.=0A=
>>=0A=
>> But all this has me thinking about something... if the code generated by=
>=0A=
>> the C backend isn't compatible with that generated by cm3cg=2C shouldn't=
>=0A=
>> the target names be different=2C so that you could even have both systems=
>=0A=
>> installed at the same time. E.g.=2C ARMEL_LINUX_C and ARMEL_LINUX=0A=
>> (or whatever). Of course it makes it a bit more fiddly to bootstrap=0A=
>> since you're cross-compiling even though it's actually native..? I haven'=
>t=0A=
>> thought through all the ramifications. Is it difficult to change the name=
>?=0A=
>> Would it be desirable?=0A=
>>=0A=
>> Mika=0A=
>>=0A=
>> Jay K writes:=0A=
>>>Oh=3D2C sorry=3D2C here are things to try=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>edit m3-sys/m3cc/src/platforms.quake=3D0A=3D=0A=
>>>look for ARMEL_LINUX=3D2C change the right hand side to arm-linux-gnueabi=
>hf=3D=0A=
>>>=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>and/or in src/m3makefile=3D2C you want to add -with-hard-float or -with-h=
>ardf=3D=0A=
>>>loat..no=3D2C wait=3D2C from your other mail:=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>=3DA0And=3D2C really=3D2C the guide here is what you showed for gcc:=3DA0=
>=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>=3DA0Configured with: ../src/configure =3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 -v \=3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 ... =3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 --with-arch=3D3Darmv6 =3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 --with-fpu=3D3Dvfp=3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 --with-float=3D3Dhard =3DA0=3D0A=3D=0A=
>>>=3DA0 =3DA0 --target=3D3Darm-linux-gnueabihf=3DA0=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>=3DA0One/some/all of those are relevant.=3DA0=3D0A=3D=0A=
>>>=3DA0You might as well go ahead and throw them all in for now.=3DA0=3D0A=
>=3D=0A=
>>>=3D0A=3D=0A=
>>>=3DA0Hey -- isn't that C backend convenient? :)=3DA0=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>=3DA0- Jay=3D0A=3D=0A=
>>>=3D0A=3D=0A=
>>>----------------------------------------=3D0A=3D=0A=
>>>> To: jay.krell at cornell.edu=3D0A=3D=0A=
>>>> CC: m3devel at elegosoft.com=3D0A=3D=0A=
>>>> Subject: more cm3cg on Raspberry Pi=3D0A=3D=0A=
>>>> Date: Fri=3D2C 18 Oct 2013 18:26:02 -0700=3D0A=3D=0A=
>>>> From: mika at async.caltech.edu=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> After setting up for soft float=3D2C I got a lot of these warnings/erro=
>rs..=3D=0A=
>>>.=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> new source -> compiling RTHeapInfo.m3=3D0A=3D=0A=
>>>> RTHeapInfo.ms: Assembler messages:=3D0A=3D=0A=
>>>> RTHeapInfo.ms:859: rdhi=3D2C rdlo and rm must all be different=3D0A=3D=
>=0A=
>>>> RTHeapInfo.ms:907: rdhi=3D2C rdlo and rm must all be different=3D0A=3D=
>=0A=
>>>> RTHeapInfo.ms:927: rdhi=3D2C rdlo and rm must all be different=3D0A=3D=
>=0A=
>>>> new source -> compiling RTHeapMap.i3=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> This is with the following configuration:=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> in /usr/local/cm3 I have the C-generating compiler installed. It seems =
>to=3D=0A=
>>> mostly work=3D2C as discussed.=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> Then I run boot2.sh=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> boot.sh finally ends with the following output=3D2C which doesn't look =
>quit=3D=0A=
>>>e right:=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> =3D3D=3D3D package /big/home2/mika/2/cm3-cvs/cm3/m3-sys/mklib =3D3D=3D3=
>D=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> +++ /usr/local/cm3/bin/cm3 -build -DROOT=3D3D/big/home2/mika/2/cm3-cvs/=
>cm3 =3D=0A=
>>>+++=3D0A=3D=0A=
>>>> --- building in ARMEL_LINUX ---=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> ignoring ../src/m3overrides=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> new source -> compiling Main.m3=3D0A=3D=0A=
>>>> -> linking mklib=3D0A=3D=0A=
>>>> =3D3D=3D3D> /big/home2/mika/2/cm3-cvs/cm3/m3-sys/mklib done=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> +++ /usr/local/cm3/bin/cm3 -ship -DROOT=3D3D/big/home2/mika/2/cm3-cvs/c=
>m3 +=3D=0A=
>>>++=3D0A=3D=0A=
>>>> --- shipping from ARMEL_LINUX ---=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> . =3D3D> /usr/local/cm3/pkg/mklib/ARMEL_LINUX=3D0A=3D=0A=
>>>> .M3EXPORTS .M3WEB=3D0A=3D=0A=
>>>> ../src =3D3D> /usr/local/cm3/pkg/mklib/src=3D0A=3D=0A=
>>>> Main.m3=3D0A=3D=0A=
>>>> . =3D3D> /usr/local/cm3/bin=3D0A=3D=0A=
>>>> mklib=3D0A=3D=0A=
>>>> =3D3D=3D3D> /big/home2/mika/2/cm3-cvs/cm3/m3-sys/mklib done=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> /big/home2/mika/2/cm3-cvs/cm3/m3-sys/m3cggen/ARMEL_LINUX/m3cggen> /big/=
>ho=3D=0A=
>>>me2/mika/2/cm3-cvs/cm3/m3-sys/m3cc/gcc/gcc/m3cg/m3cg.h=3D0A=3D=0A=
>>>> mkdir -p /usr/local/cm3/bin=3D0A=3D=0A=
>>>> cp -Pv /big/home2/mika/2/cm3-cvs/cm3/m3-sys/cm3/ARMEL_LINUX/cm3 /usr/lo=
>ca=3D=0A=
>>>l/cm3/bin/cm3=3D0A=3D=0A=
>>>> Traceback (most recent call last):=3D0A=3D=0A=
>>>> File "./upgrade.py"=3D2C line 72=3D2C in <module>=3D0A=3D=0A=
>>>> reload(pylib) # compiler host type may have changed and need to recompu=
>te=3D=0A=
>>> stuff=3D0A=3D=0A=
>>>> File "/big/home2/mika/2/cm3-cvs/cm3/scripts/python/pylib.py"=3D2C line =
>650=3D=0A=
>>>=3D2C in <module>=3D0A=3D=0A=
>>>> if Host.endswith("_NT") or Host =3D3D=3D3D "NT386":=3D0A=3D=0A=
>>>> AttributeError: 'NoneType' object has no attribute 'endswith'=3D0A=3D=
>=0A=
>>>> raspberrypi:/big/home2/mika/2/cm3-cvs/cm3/scripts/python#=3D0A=3D=0A=
>>>>=3D0A=3D=0A=
>>>> Mika =3D 		 	   		  =