Pkgsrc LLVM 19.x on i386?

[Havard Eidnes <he%NetBSD.org@localhost>]

Hi,

in an effort to find out whether rust can be built with the
pkgsrc-provided LLVM, and to test that on other NetBSD 9.x
platforms than on amd64, I decided to try on NetBSD/i386.  For
testing I have a host with PAE enabled, and more than enough
physical memory to not make this a slog.

However, I am finding that pkgsrc LLVM itself fails to build.
"top" right before it bombs looked like this:

  PID USERNAME PRI NICE   SIZE   RES STATE      TIME   WCPU    CPU COMMAND
14233 he        21    4  2655M 2630M CPU/1      1:51 99.41% 99.02% cc1plus

and the build log ends in

[ 46%] Building CXX object lib/Transforms/Utils/CMakeFiles/LLVMTransformUtils.dir/SCCPSolver.cpp.o

cc1plus: out of memory allocating 43814400 bytes after a total of 0 bytes

From earlier discussions I vaguely seem to remember that the i386
port is architecturally limited to max around 3GB virtual address
space per process.  Pkgsrc says "needs to use gcc8":

$ make show-var VARNAME=GCC_REQD
7 7 8
$ pwd
/usr/pkgsrc/lang/llvm
$ 

so that's what's done:

=> Build dependency gcc8>=8.5.0nb1: NOT found
=> Verifying reinstall for ../../lang/gcc8
...
=> Returning to build of llvm-19.1.7
=> Full dependency gcc8-libs>=8.3.0: found gcc8-libs-8.5.0nb3

LLVM itself says

GCC_REQD+=              7

so I have not yet figured out where the 8 comes from.

Has LLVM outgrown the i386 port, or is it just a matter of using
a gcc which is newer and doesn't blow up on LLVM?

Regards,

- Håvard