I'm building a Qt6 project using the following command
~/Qt/6.3.1/gcc_64/bin/qmake -o ~/nidb/bin/smtp/Makefile ~/nidb/src/smtp/SMTPEmail.pro -spec linux-g++
And it generates this error...
~/Qt/6.3.1/gcc_64/mkspecs/features/toolchain.prf:76: Variable QMAKE_CXX.COMPILER_MACROS is not defined.
This used to work fine on my Rocky Linux 8 machine, but now it's not working. I ran a yum update at some point in the last few weeks, but that's the only thing I can think of that changed. What are some other reasons it might have stopped working?