misc/56223: Compilation as root for various pkgsrc packages screws up the console

[davshao%gmail.com@localhost]

>Number:         56223
>Category:       misc
>Synopsis:       Compilation as root for various pkgsrc packages screws up the console
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 31 21:25:00 +0000 2021
>Originator:     David Shao
>Release:        
>Organization:
>Environment:
NetBSD xxxxxx.xxx 9.99.82 NetBSD 9.99.82 (GENERIC) #3: Mon May 31 19:06:15 UTC 2021  xxxxxx%xxxxxx.xxx@localhost:/usr/obj/sys/arch/amd64/compile/GENERIC amd64

>Description:
When in console as root on various machines, such as one with an Intel Ivy Bridge integrated graphics or one with a CAICO AMD Radeon graphics card, simply doing something like

cd /usr/pkgsrc/pkgtools/cwrappers
make clean && make replace package clean
cd /usr/pkgsrc/pkgtools/digest
make clean && make replace package clean
cd /usr/pkgsrc/devel/gmake
make clean && make replace package clean

in the make portion of gmake causes characters to stop being displayed on the console.  This is not observed if building in native or modular xorg or building while ssh-ing.  The command appears to finish.
>How-To-Repeat:

>Fix: