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’