id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
200	Synchronizing cflag/cxxflags/compileflags toolset init options and relevant feature handling.	jurko.gospodnetic@…	somebody	"Currently Boost build has toolset initialization options named cflags, cxxflags & compileflags and regular features named cflags & cxxflags. The two are specified using a very similar (equal?) syntax but do not have the same behaviour and the difference is not clear to the end-user.

Toolset initialization parameters are handled by the common.handle-options() rule in the tools/common.jam module and there the semantics are as follows:
 * cflags       ... additional flags when using a C compiler.
 * cxxflags     ... additional flags when using a C++ compiler.
 * compileflags ... additional flags when using a C or C++ compiler.

On the other hand specifying cflags & cxxflags properties is handled by each toolset separately (e.g. tools/gcc.jam) and seems to have the following semantics:
 * cflags   ... additional flags when using a C or C++ compiler.
 * cxxflags ... additional flags when using a C++ compiler.

Note that compileflags is not a valid feature at all.

This should be updated so that the two are in sync.

The feature names should most likely be updated then as well. Compile flags does not seem like being named precisely enough (it does not affect the fortran compiler for instance). Some examples would be:
 * cflags.
 * cxxflags.
 * ccxxflags.
 * c-flags.
 * cxx-flags.
 * c-cxx-flags.

If this is done that other toolset initialization options and features related to other languages should be checked as well so they are named consistently.

Please note though that this will most likely break backward compatibility so we might need some sort of an intermediate solution to ease the transition, e.g. adding the new behaviour but also adding a configuration option to allow switching back to the original behaviour.
"	defect	new	minor	M13	component1	2.0		cflags cxxflags compileflags