Solved devel/boost-libs: meaning of OPTIMIZED_CFLAGS?

[Hornpipe2]

Port devel/boost-libs has a config option called OPTIMIZED_CFLAGS available. However, I am looking at the Makefile and patches, and I don't see it actually being used anywhere. Does this control some kind of "generic" port-building setting (/etc/make.conf or similar)? Or perhaps it is a deprecated option that should be removed, as it no longer does anything?

 

[Hornpipe2]

Never mind, I see the issue. Makefile includes this line:

.include "${.CURDIR}/../boost-all/compiled.mk"

Looking at devel/boost-all/compiled.mk there is:

OPTIMIZED_CFLAGS_MAKE_ARGS=    inlining=full

This option is explained (badly) in the Boost manual, section 6.3:

inlining
Allowed values: off, on, full.

Enables inlining.

Mystery solved.