Unknown GCC pragma generates warning in LLVM

Question

I'm using a GCC #pragma like this:

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
...
#pragma GCC diagnostic pop

This works great and removes the erroneous maybe-uninitialized errors that I'm seeing.

However, in old-ish versions of LLVM/clang++ (seen in clang version 9.0.0) this pragma is unknown and throws a warning. Since we also use -Werror, these warnings are turned to errors and compilation fails. See this output:

/home/path/to/include.hpp:22:32: warning: unknown warning group '-Wmaybe-uninitialized', ignored [-Wunknown-warning-option]
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
                               ^
In file included from /home/path/to/main.cpp:1:

/home/path/to/include.hpp:22:32: error: unknown warning group '-Wmaybe-uninitialized', ignored [-Werror,-Wunknown-warning-option]

#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
                               ^

1 error generated.

How can I use this GCC #pragma when compiling with LLVM?