This allows building two versions for different architectures at
the same time, without the built files clobbering each other.
This is very helpful when trying to track down differences between
two build configurations.
To build outside of the source tree, create the other directory to
use for building (either outside of the openh264 directory, or as
a subdirectory), enter that directory, and do
"make -f path/to/openh264/Makefile".
This avoids coupling the architecture directly to the platform,
allowing building on e.g. linux on architectures other than x86,
without having to explicitly specify USE_ASM=No while building
on those.
Later this will also facilitate enabling assembly optimizations
where applicable, e.g. arm assembly on linux.
Add platform-freebsd.mk makefile to allow building on FreeBSD.
OpenH264 builds and runs successfully on FreeBSD 9.2-RELEASE amd64, with both
the gcc and clang compilers.
Note that building i386 binaries with the native toolchain using the -m32 flag
on amd64 FreeBSD is unsupported and will not work, so ENABLE64BIT should always
be set to Yes when compiling on a FreeBSD amd64 system.
