Re: How to build perl-5.32.0 (or later) with ivsize of 4 on Ubuntu-20.04 ?

IIRC, IVs must be big enough to hold a pointer, so it is not possible to compile Perl with 32 bit IVs on a 64 bit platform.

Comment on Re: How to build perl-5.32.0 (or later) with ivsize of 4 on Ubuntu-20.04 ?

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Re^2: How to build perl-5.32.0 (or later) with ivsize of 4 on Ubuntu-20.04 ? by syphilis (Archbishop) on Jan 17, 2021 at 00:51 UTC
IIRC, IVs must be big enough to hold a pointer I've compiled perl with 32 bit IVs on 64-bit Windows 7, Debian Wheezy(ppc64), and freebsd-12.0. But yes, ptrsize then needs to be 4 bytes, and I assume there must also be some mechanism ensuring that addresses of all allocated memory fit into 4 bytes. I suspect that, with the right toolchain, I could also achieve such a build on Ubuntu, but I'm not going to chase that up right now. I was hoping that there might have been some simple trick I could use - hence my initial question. On the freebsd system, the 32-bit build was achieved by simply passing `-Dcc="cc -m32"` to Configure. When I build perl on the Debian system, I (strangely) get 32-bit builds by default, though the system perl is 64-bit. So I pass `-Dcc="gcc -m64"` to Configure in order to get the 64-bit builds there. On Windows, it's just a case of using a 32-bit toolchain and ensuring that the `WIN64=undef` arg is provided to make. Cheers, Rob	[reply] [d/l] [select]
Re^2: How to build perl-5.32.0 (or later) with ivsize of 4 on Ubuntu-20.04 ? by ikegami (Patriarch) on Jan 17, 2021 at 00:18 UTC
Yes, Which is why they were using `-m32` to build a 32-bit binary.	[reply] [d/l]