I am trying to build our code base with gcc 9.2.0, but when using -flto, I get a dozen warnings with missing information. These issues did not arise with gcc6.3.
<filename>: In member function ‘__ct_base ’:
<filename2:line>: error: is used uninitialized in this function [-Werror=uninitialized]
Unfortunately, the line mentioned is literally empty, and the warning message is missing the identifier which is uninitialized.
I would love to reproduce with a smaller test case but I have no idea which variable it concerns. The two files mentioned don’t mention anything specific. It actually complains about a compiler-generated function (__ct_base).
Is there any way to get more information from gcc on the warning ?