Building 64-bit Binaries
------------------------

"-fPIC" should be added to the compiler flags. Additionally, libraries
should be installed to lib64/, not lib/. For example, under autotools-based
build systems:

CFLAGS="-O2 -fPIC" \
CXXFLAGS="-O2 -fPIC" \
./configure \
	--prefix=/usr \
	--libdir=/usr/lib64

Is suitable in most cases when a package is being created.

With cmake, compiler flags should be set automatically, and
"cmake -DLIB_SUFFIX=64" should set the library path correctly.

Building 32-bit Binaries
------------------------

All that is needed is adding "-m32" to the compiler flags. Quite a few
build systems however insist on adding -m64, regardless of what you tell
it. For this reason, a few scripts have been written to enforce 32-bit
builds. To load them into your path (including wrappers around gcc):

. /etc/profile.d/32dev.sh

Additionally, if any binaries conflict with 64-bit versions, on Slamd64,
they are installed into bin/32/, not bin/.

For example, again with autotools:

. /etc/profile.d/32dev.sh
./configure \
	--prefix=/usr \
	--bindir=/usr/bin/32