Move the boilerplate up onto the outer namespace line. Decorate each
collision with a comment stating its purpose, so that compiler error
output echoes the type of collision.
This started as a project to make SConstruct take less time on an empty
build. Unforunately, most of the major gains lie elsewhere and require
deeper changes to the build system. These changes do not help much, but
they are better than nothing.
Add option to compute indirect includes even when not necessary, since
indirect includes influence the inclusion count shown in the comments.
Enabling this option makes SCons work harder for the same output binary.
It should only be used by developers who want to see precise file
inclusion counts.
Current gcc requires a non-PIE cc1plus for working PCH support. If the
chosen compiler is PIE, it will succeed in building the PCH, then fail
when trying to use it.
Per issue from MattWatt, gcc for Raspberry Pi warns about alignment
issues.
Per issue from kreator, clang warns about alignment issues on OS X.
However, it does not warn on x86_64-pc-linux-gnu.
GCC only warns when compiling for a target architecture that requires
alignment, so it does not warn for i686-pc-linux-gnu or
x86_64-pc-linux-gnu.
Using this warning would be nice, but since it only triggers on
architectures not maintained by active developers, it causes more
trouble than it may solve.
Alignment sensitive users will have to get by with software fixups until
an active developer begins targeting alignment sensitive hardware.
Reported-by: MattWatt <https://github.com/dxx-rebirth/dxx-rebirth/issues/119>
Reported-by: kreatordxx <https://github.com/dxx-rebirth/dxx-rebirth/issues/120>
Some builds of SDL lack joystick support. Rebirth requires joystick
support in SDL, even if the user never connects a joystick. Add a call
to SDL_NumJoysticks during the SDL test so that systems without SDL
joystick support fail the "usable library SDL" test.
