startup object files missing

hi all, new to stm32cube ide.

i generated all of the project files using the build in cubemx thing and written my program but when i press compile, make errors out on Startup/startup_stm32f407vgtx.o missing.

i've tried generating the files with a seperate cubemx installation but with the same result.

so i came to the conclusion: either my pc is not doing stuff or i missed a setting.

do you have any suggestions?

thanks in advance!

kars noordhuis