The -all_load flag will apply to all future libraries added on the command line,
while the -force_load flag only applies to the next library. Using the latter
allows to selectively force load the specific libraries we want.
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PiperOrigin-RevId: 244949770
This is making up for some differences in standard library and linker flags.
It also get rid of the requirement to build with RTTI.
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PiperOrigin-RevId: 241348845