On Thu, Dec 1, 2022 at 9:53 AM Jeffrey Walton <noloa...@gmail.com> wrote: > > On Wed, Nov 30, 2022 at 8:26 PM Jeffrey Walton <noloa...@gmail.com> wrote: > > > > On Wed, Nov 30, 2022 at 5:14 PM László Böszörményi (GCS) <g...@debian.org> > > wrote: > > > ... > > > You may locally hack the build of boost1.74 not to require Python > > > (and drop its related binary packages). Of course, best would be to > > > port python-greenlet to sh4 or just fix its build - can you give a > > > helping hand to its upstream? > > > At least this is what I see without access to any sh4 machine. As we > > > know each other, I may check it for you if I can access that machine. > > > But I think you are much more skilled in these things. > > > > Yes, sure. Let me take a look at python-greenlet on SH4. > > Ok, so I had a look at this last night. I don't think I am going to be > able to help with improving Greenlet. For Greenlet, I think the best > course of action is to ping the Greenlet developers and ask them for > help with SH4. > > The #error is triggered because there's no switch_sh4_linux.h in [1]. > The file provides a function called slp_switch(), and it is inline > ASM. Based on other arch files, it looks like the function does some > sort of manual switching on app-managed lightweight threads. So the > function uses inline ASM to save/restore registers and move the stack > pointer around (if I am parsing things correctly). > > Unfortunately, I think that's a bit outside my comfort zone. I don't > know Greenlet, and I don't know SH4 ASM. For completeness, here is the > SH4 software manual: [2]. > > If the Greenlet developers decline to port to SH4, then I think the > next step is to remove the Greenlet dependency on SH4. Maybe there's a > configure option in GDB, Boost or Python that can ultimately sidestep > the dependency on SH4. I think the first team to engage is the GDB > team. They may have a suggestion to shed the Boost dependency. > > [1] > https://github.com/python-greenlet/greenlet/tree/master/src/greenlet/platform > [2] https://www.renesas.com/us/en/document/mas/sh-4-software-manual
Ok, so it looks like the Greenlet developers have an open bug report at [1]. It was opened Apr 19, 2020. I'm guessing the Greenlet developers are not going to provide the support given they've had over 2 years to do so. I think that leaves contacting the GDB folks to see if there's a way to sidestep Boost dependency. [1] https://github.com/python-greenlet/greenlet/issues/166
