please help me!

[zuoyanzhang]

Why do I enter --tool=fpdebug, it shows failed to start tool 'fpdebug' for platform 'amd64-linux', if you can answer me, thank you very much

[paulfloyd]

Is it picking up the Valgrind with FpDebug that you built?

You should be able to run Valgrind from your build directory by using the vg-in-place script.