| Thank you for the hint! — that work just perfectly.
Best,
Ken
you have to add the following to your /etc/apt/sources.list to get the experimental packages
see here https://wiki.debian.org/DebianExperimental
It appears that when building portable code, the ax_gcc_archflag.m4 macro clears -mcpu for almost every arch except powerpc:
https://github.com/libffi/libffi/blob/master/m4/ax_gcc_archflag.m4#L241
case $host_cpu in i*86|x86_64*|amd64*) flag_prefixes="$flag_prefixes -mcpu= -m";; esac
The fact that PowerPC is excluded must result in m4 passing the “-mcpu=“ flag matching the buildbot’s CPU, and breaks everything older than the buildbot.
This must happen with any build that uses this ax_gcc_archflag.m4 macro.
I wonder why powerpc* is excluded? Seems like this line should rather be:
case $host_cpu in i*86|x86_64*|powerpc*|amd64*) flag_prefixes="$flag_prefixes -mcpu= -m";; esac
Ken
PS. Although I did not as yet sort out getting the “experimental” packages (I keep getting an error when I try to use that option), building libffi in a couple of minutes on the local machine and installing that of course works easily. — K
> On Nov 2, 2021, at 2:01 PM, John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> wrote:
>
> On 11/2/21 21:59, Cameron MacPherson wrote:
>> i got the 3.4.2-3+ports package after apt upgrade -t experimental and there
>> are no illegal instructions
>
> As I expected. The build log didn't have any traces of "-mcpu=power8".
>
> Adrian
>
> --
> .''`. John Paul Adrian Glaubitz
> : :' : Debian Developer - glaubitz@debian.org
> `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
> `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
>
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