Re: Fail to cross build

[Chet Ramey]

On 11/24/24 12:59 PM, Bastien Roucariès wrote:
>  From debian:
>
> https://lists.debian.org/debian-cross/2023/11/msg00000.html
>
> Hello,
>
> While cross-building hurd-amd64 from linux, I got a subtle issue with
> bash, that was leading to perl FTBFS very oddly.
>
> The issue essentially was in bash/builtins/Makefile.in:
>
> pipesize.h:     psize.aux
>         $(SHELL) $(srcdir)/psize.sh > $@

Yes, the Makefile acknowledges this:

# Technically this is wrong; the pipe size should be for the target system,
# not the build host.
psize.aux:      psize.c
        $(CC_FOR_BUILD) $(CCFLAGS_FOR_BUILD) ${LDFLAGS_FOR_BUILD} -o $@ 
$(srcdir)/psize.c

since it's very difficult to run things built for the target system and
there isn't a portable way to query the actual pipe size at runtime
(getconf may just give you the posix maximum).

--
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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