#427 Patch to allow FLAC-1.3.1 to build on x32 systems

[Stuart Shelton]

FLAC fails to build on x86_64 systems using the x32 ABI as the build system attempts to link 32bit and 64bit objects. This is due to a bad assumption in the configure.ac of FLAC-1.3.1, which (not unreasonably) assumes that 32bit pointers on a 64bit CPU indicates 32bit userspace, and builds as if the host CPU was also 32bit.

The patch at https://raw.githubusercontent.com/srcshelton/gentoo-ebuilds/master/media-libs/flac/files/flac-1.3.1-x32.patch allows FLAC to build on x32 systems, and shouldn't adversely affect any other platform or ABI.

[Erik]

Fixed in:

commit 7566d3d4c11c16801e1c98093c4db33589451c17
Author: Erik de Castro Lopo <erikd@mega-nerd.com>
Date:   Wed Mar 11 20:51:42 2015 +1100

configure.ac : Tweak for x32 architecture.

The x32 architecture uses and ILP32 (32 bit ints, longs and pointers)
on an x86_64 CPU. Since the CPU is x86_64 we need to set FLAC__CPU_X86_64
even though the pointer size is 32 bits.

Patch-from: Stuart Shelton
Closes: https://sourceforge.net/p/flac/bugs/427/

Thanks!

[Lukáš Ručka]

Edit: False alarm, the problem was on my side - I had my compiler configuration broken.

Unfortunately the patch by Sturart does not work for me, as the build environment does not provide gnux32 target. I re-wrote the architecture detection using guidelines for Debian (https://wiki.debian.org/X32Port), succesfully tested on current gentoo with default/x32 profile.