How to apply -fvisibility option to symbols in static libraries?

Simply pass -Wl,--exclude-libs,ALL to gcc

This will tell the linker to transform all the symbols in the static libraries to hidden.

--exclude-libs also accepts a list of archives (i.e. static library names) for finer granularity on which libraries to hide symbols from.

Note: this will only work in systems using GNU binutils (e.g. Linux) or with a linker supporting --exclude-libs (e.g. it won’t work with OSX’s ld64)

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