Rely on inline functions even if that causes warnings in older compilers.
So far we have worked around the fact that some very old compilers do not support 'inline' functions by only using inline functions conditionally (or not at all). Since such compilers are very rare by now, we have decided to rely on inline functions from 9.6 onwards. To avoid breaking these old compilers inline is defined away when not supported. That'll cause "function x defined but not used" type of warnings, but since nobody develops on such compilers anymore that's ok. This change in policy will allow us to more easily employ inline functions. I chose to remove code previously conditional on PG_USE_INLINE as it seemed confusing to have code dependent on a define that's always defined. Blacklisting of compilers, like in c53f7387, now has to be done differently. A platform template can define PG_FORCE_DISABLE_INLINE to force inline to be defined empty. Discussion: 20150701161447.GB30708@awork2.anarazel.de
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config/test_quiet_include.h
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