compilation warnings about "pragma diagnostic pop could not pop, no matching push"

[paciorek]

Compilation (including installing nimble from source) is giving a (new?) warning.

Just flagging it. I haven't checked if it is Mac-specific or Apple Silicon Mac-specific. But I don't see it on Linux.

Here's one of the warnings when installing nimble, but one should be able to see if when using compileNimble.

/Library/Frameworks/R.framework/Resources/bin/Rscript --vanilla ./customizeMakeconf.R
Building libnimble.a
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG -DR_NO_REMAP -I"../include"   -I/opt/R/arm64/include    -fPIC  -falign-functions=64 -Wall  -O2   -c nimOptim.cpp -o nimOptim.o
In file included from nimOptim.cpp:23:
In file included from ../include/nimble/nimOptim.h:25:
In file included from ../include/nimble/NimArr.h:26:
In file included from ../include/nimble/NimArrBase.h:33:
In file included from ../include/Eigen/Core:382:
../include/Eigen/src/Core/util/ReenableStupidWarnings.h:14:30: warning: pragma diagnostic pop could not pop, no matching push
      [-Wunknown-pragmas]
    #pragma clang diagnostic pop