could someone please explain the following out of the build_cvs install doc:

cd ../mysql
mkdir $(BUILD_PLATFORM) (RHEL4, FC3, FC4, MACOSX, SuSEES9, DEBIAN3.1)
cd $(BUILD_PLATFORM)
# download mysql 4.1.10a for your platform (binary) or 4.1.14(source) if MACOSX
# Also grab client libraries (unless MACOSX)

Does this mean I only have to download the rpms under a new distro dir? Do they need to be installed at all?

if then why is this:
add /opt/zimbra/mysql/lib to /etc/ld.so.conf
needed? If I follow this doc, this dir doesn't even exist at this point.

the other thing I'm wondering is this line:

export LD_LIBRARY_PATH=/opt/zimbra/mysql/lib:${LD_LIBRARY_PATH}

What is this ${LD_LIBRARY_PATH} variable, what do I replace this with?

Miles