Compiling GCC 10.2 on AIX 7.2

["Randal T. Rioux" <randal@procyonlabs.com>]

System: IBM POWER 740 (POWER7 CPU)
OS Level: 7200-04-02-2016
Bootstrap Compiler: GCC 8.3.0 from AIX Toolbox (IBM yum repo)

Please let me know if I need to include anything else. Hopefully I've
provided enough information to aid in my request here.

Environment Variables:

export CFLAGS="-mcpu=power7 -pipe -O2 -I/opt/freeware/include"
export CXXFLAGS=$CFLAGS
export LDFLAGS="-L/opt/freeware/lib64 -L/opt/freeware/lib
-Wl,-blibpath:/opt/freeware/lib64:/opt/freeware/lib:/usr/lib:/lib
-Wl,-bmaxdata:0x80000000"
export CONFIG_SHELL=/opt/freeware/bin/bash
export CONFIG_ENV_ARGS=/opt/freeware/bin/bash

configure output: https://pastebin.com/FinvPRPU
config.log: https://pastebin.com/4Y30z9tU
config.status: https://pastebin.com/C7ZC9uzB

configure seems to work fine, although the config.log seems to show it
ignores my flags to only enable c/c++ compilers (I could be reading this
wrong).

Running make works for a little bit, then dies around:

(snip)
mkdir -p -- common/.deps
mkdir -p -- analyzer/.deps
config.status: executing default commands
gmake[2]: Leaving directory '/usr/src/gcc-build'
gmake[1]: *** [Makefile:20799: stage1-bubble] Error 2
gmake[1]: Leaving directory '/usr/src/gcc-build'
gmake: *** [Makefile:1002: all] Error 2

I've been going crazy trying to figure this one out. But it's time to
reach out for a little help!

Thanks for any advice.

Randal