Emulator

I am thinking about making options with scons to make all of the global paths configurable much like autoconf does.

Yeah, on Debian based systems (well, Ubuntu at least) /usr/lib64 is just a link to /usr/lib.

to solve that specific problem all you need to do is
check on 64bit systems if /usr/lib64 exist if so use it if not use /usr/lib
we already have so many scons options this is getting real messy:/

nakeee: Dolphin currently has twenty options. That is really not very many options at all compared to the number of options that many programs have in their build systems. Also, a proper build system should always have things like the lib dir, binary dir, and data dir configurable.

I have always been told that the autodetection isn't possible, citing "exotic" systems (Solaris/SPARC, etc.) I have never used. If it works in openSUSE to me it's ok whatever you do, but...

About CMake, It's my understanding that most projects use LIB_SUFFIX. But that seems to be a de facto standard started by KDE, nothing official supported by CMake. It is CMakeFile.txt-dependent and some projects use another variable or fail to support lib64 at all.

wasnt it fixed in cmake?

it's not autodetected, but it can be adjusted with some option iirc.

The option is -DLIB_SUFFIX=64. Autodetection can be done but will never be 100% reliable.