User`s guide

IST-033576 D2.1.4

You may wish to set up your system to load these modules by default at boot

time. The exact mechanism for doing so differs between Linux distributions, and

thus requires an experienced system administrator. However, a template init script

is provided as etc/blcr.rc in the BLCR source directory.

A.1.9 Updating ld.so.cache

Nearly all Linux distributions use a caching mechanism for resolving dynamic

library dependencies. If you have installed BLCR’s shared library in a directory

that is cached by the mechanism, then you will need to update this cache. To do

so, run the ldconﬁg command as root; no command-line arguments are needed.

It should always be safe to run the ldconﬁg command, even if BLCR did not

install its library in a directory managed in the cache. However, if you wish to

avoid this step when unneccessary, you can known that BLCR’s shared library

is in a cached directory if you conﬁgured with –preﬁx= or –libdir= options that

cause BLCR’s shared library (libcr.so) to be installed in:

• /lib or /usr/lib

• any directory listed in /etc/ld.so.conf

• any directory listed in a ﬁle under /etc/ld.so.conf.d/

Note that if you passed no –preﬁx= or –libdir= options to BLCR’s conﬁg-

ure script, then you should check /etc/ld.so.conf and /etc/ld.so.conf.d/ for /usr/lo-

cal/lib (the default location) to determine if you actually need to run the ldconﬁg

command.

A.1.10 Conﬁguring Users’ environments

Finally, you may wish to add the appropriate BLCR directories to the default

PATH, LD_LIBRARY_PATH, and MANPATH environment variables for your

users. You may either modify the /etc/proﬁle and/or /etc/cshrc ﬁles, or you may

provide modules that accomplish the same thing). You should replace PREFIX by

the installation preﬁx (such as /usr/local) in the following examples:

For Bourne-style shells:

$ PATH=$PATH : PREFIX / b i n

$ MANPATH=$MANPATH: PREFIX / man

$ LD_LIBRARY_PATH=$LD_LIBRARY_PATH : PREFIX / l i b

$ e x p o r t PATH MANPATH LD_LIBRARY_PATH

For csh-style shells:

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