Following is output of make when running in debug, -d, mode:

Considering target file '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile'.
Looking for an implicit rule for '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile'.
Trying pattern rule with stem 'makefile'.
Trying implicit prerequisite '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile,v'.
Trying pattern rule with stem 'makefile'.
Trying implicit prerequisite '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/RCS/makefile,v'.
Trying pattern rule with stem 'makefile'.
Trying implicit prerequisite '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/RCS/makefile'.
Trying pattern rule with stem 'makefile'.
Trying implicit prerequisite '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/s.makefile'.
Trying pattern rule with stem 'makefile'.
Trying implicit prerequisite '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/SCCS/s.makefile'.
No implicit rule found for '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile'.
Finished prerequisites of target file '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile'.
No need to remake target '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile'.
Updating goal targets....
Considering target file 'lib'.
File 'lib' does not exist.
Considering target file '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs'.
File '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs' does not exist.
Finished prerequisites of target file '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs'.
Must remake target '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs'.
Need a job token; we don't have children
make[1]: Entering directory '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src'
Putting child 0x6f6570 (/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs) PID 7966 on the chain.
Recipe of '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs' is being run.
Considering target file 'silent'.
File 'silent' does not exist.
Finished prerequisites of target file 'silent'.
Must remake target 'silent'.
Live child 0x6f6570 (/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs) PID 7966
Need a job token; we have children
Live child 0x6f6570 (/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs) PID 7966
Obtained token for child 0x71be50 (silent).
Estimated system load = 1.490000 (actual = 1.490000) (max requested = 16.000000)
Released token for child 0x71be50 (silent).
Successfully remade target file 'silent'.
Finished prerequisites of target file 'lib'.
The prerequisites of 'lib' are being made.
Live child 0x6f6570 (/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs) PID 7966
Reaping winning child 0x6f6570 PID 7966
Live child 0x6f6570 (/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs) PID 7967
chmod: cannot access '/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs': No such file or directory
Reaping losing child 0x6f6570 PID 7967
make[1]: *** [/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src/makefile:59: /root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/rt/load/pwrs.dbs] Error 1
Removing child 0x6f6570 PID 7967 from chain.
make[1]: Leaving directory '/root/pwrsrc_6.0.0-1/src/wbl/pwrs/src'
F 2022-12-07 13:02:32.00 build-rt, Fatal error, build terminated

I don't understand why pwrs.dbs is not created but maybe that is out of my league. for now.

The pwrs.dbs rule uses this executable to create the dbs-file

/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/exp/exe/wb_cmd_gtk

It should have been created earlier in the build sequence. I suspect that it doesn't exist and the build of this file failed for some reason.

/Claes

Since you mention wb_cmd_gtk, and I see gtk at the end, I tried to build it with only qt support. But that doesn't work either. I get the following:

/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/bld/lib/glow/glow_draw_qt.cpp: In member function ‘virtual int GlowDrawQt::text(GlowWind*, int, int, char*, int, glow_eDrawType, glow_eDrawType, int, int, int, glow_eFont, double, int)’:
/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/bld/lib/glow/glow_draw_qt.cpp:1249:25: error: ‘class GrowCtx’ has no member named ‘bitmap_fonts’
1249 | if (!((GrowCtx*)ctx)->bitmap_fonts) {
| ^~~~~~~~~~~~
/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/bld/lib/glow/glow_draw_qt.cpp: In member function ‘virtual int GlowDrawQt::text_erase(GlowWind*, int, int, char*, int, glow_eDrawType, int, int, glow_eFont, double, int)’:
/root/pwrsrc_6.0.0-1/rls/os_linux/hw_x86_64/bld/lib/glow/glow_draw_qt.cpp:1320:25: error: ‘class GrowCtx’ has no member named ‘bitmap_fonts’

The qt version is not up to date. Build the gtk version instead.

/Claes

Well, I've come to a dead end. I just cannot build this software even though I have all the necessary packages installed.
I've asked on IRC and others have tried to build it, without success. It may be so that there's a missing dependency that you developers have on your machine and I don't. Could be something in the documentation that's missing.
Too bad, because I think that this software has potential. And it obviously has since you are using it on your site.
But thank you for all your help and time!