maintenance of gcc cross ports

[Mark Millard]

On 2019-May-19, at 07:40, James Shuriff <james at opentech.cc> wrote:

> I didn't/don't plan on touching binutils. Binutils is okay. I made new patches as well. What I'm really concerned with bringing up to date is aarch64-none-elf-gcc.

> The GNU toolchain is unfortunately required for building an Aarch64 system

Are you specifically referencing contexts that need to build
u-boot? (My guess is: yes.)

I've done buildworld buildkernel based on system clang and lld many times
in the past, though not very recently. (I currently do not have access to
the environment but will again, eventually.)

For aarch64 I'd mostly recently built for and used:

A) a Pine64+ 2GB (needs: sysutils/u-boot-pine64 )
B) an OverDrive 1000 (no u-boot build needed)

I've done amd64->aarch64 cross builds and self hosted ones for/on
such. The OverDrive 1000 builds did not involve
devel/aarch64-none-elf-gcc at all as far as I can remember.

> and is a prereq for a bunch of sysutils arm ports.

Yep.

Are there sysutils/u-boot-* 's that no longer build under gcc 6.4.0?
Other things?

> At worst we can do something like what's done with the lang ports gcc6, gcc7, gcc8. I've CC'd the maintainers so hopefully they can give us some input and we can come up with a solution.
> 
> As for Makefile issues, this is only an issue for the arm-none-eabi-gcc and aarch64-none-elf-gcc ports because they have multiple hyphens. It's mostly a cosmetic issue. Each port has its own plist because gcc generates different headers depending on the platform so the PLIST TARGETARCH regex doesn't really affect all that much. There are some clang flags dependent on TARGETARCH but whoever wrote the aarch64-none-elf-gcc port must have known it wasn't working in the master because the check is in the bare metal port as well. The stripping out of all hyphens causes things like "gcc version 6.4.0 (FreeBSD Ports Collection for aarch64noneelf)". I use ${PKGNAMEPREFIX:C/-$//} for the comment and version and ${PKGNAMEPREFIX:C/-.*//} for TARGETARCH. The original regex for all of those is ${PKGNAMEPREFIX:C/-//g} and I'm sure you can see how that's a problem when there's multiple hyphens.

Thanks for the notes.

> - James Shuriff
> 
> -----Original Message-----
> From: Mark Millard <marklmi at yahoo.com>
> Sent: Sunday, May 19, 2019 1:33 AM
> To: James Shuriff <james at opentech.cc>; ports-list freebsd <freebsd-ports at freebsd.org>
> Subject: Re: maintenance of gcc cross ports
> 
> James Shuriff james at opentech.cc wrote on Sat May 18 12:29:22 UTC 2019 :
> 
>> The powerpc64-gcc port and all the ports that use it as a master (aarch64-gcc, aarch64-none-elf-gcc, amd64-gcc, arm-none-eabi-gcc, i386-gcc, mips-gcc, mips64-gcc, and sparc64-gcc) are very old and use buggy makefiles. I would like to take over maintenance of these ports. Powerpc64-gcc uses an old version of gcc and the makefile is buggy. Certain variables use bad regular expressions thus don't do what they're supposed to do. I've fixed up the makefiles and made new plists with a newer version of gcc.
> 
> Be aware that:
> 
> /[ports]/head/base/binutils depends on devel/binutils via:
> 
> MASTERDIR=${.CURDIR}/../../devel/binutils
> 
> /[ports]/head/base/gcc depends on devel/powerpc64-gcc via:
> 
> EXTRA_PATCHES+= ${.CURDIR}/../../devel/powerpc64-gcc/files/freebsd-format-extensions
> EXTRA_PATCHES+= ${.CURDIR}/../../devel/powerpc64-gcc/files/freebsd-libdir
> EXTRA_PATCHES+= ${.CURDIR}/../../devel/powerpc64-gcc/files/patch-gcc-freebsd-mips
> 
> The maintainer is listed as: bapt at FreeBSD.org but the activity tends to be jhb at FreeBSD.org . There are other, more overall FreeBSD toolchain efforts that these various ports are tied to. That may constrain what can be done when. You would probably need to consult with these folks about any changes.
> 
> I use these ports for doing alternate toolchain buildworld buildkernel activities, including using, say, devel/powerpc64-gcc on a powerpc64 machine to self host with more modern tools than gcc 4.2.1 based ones.
> As I understand, being in devel/ instead of lang/ for gcc tools is tied to being constructed for the system-building activities instead of for general use.
> 
> You might want to show your Makefile updates so that that the problems are fully explicit.
> 


===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)