[bug-sourceinstall] [bug #17375] Assume default prefix from source

[Claudio Fontana]

Follow-up Comment #4, bug #17375 (project sourceinstall):

> Your implementation works fine, but isnt' there a way to 
> sourceinstall discover by itself which is the default prefix
> from the source?

Yes, but the question is: is it a good idea?

By using a global default prefix option, the user can be sure that all
packages he installs have a certain prefix, when he does not explicitly
override the globally defined default.

Otherwise we are left with the packager's whims
(Is it /usr/local, /usr, $HOME/name, /usr/local/name, ...),
which means that after installing X packages we might have X different
prefixes, with the involved confusion and potential necessity to extend PATH,
LD_LIBRARY_PATH, PKG_CONFIG_PATH, YOUR_PATH_HERE,...

while by forcing the default prefix option we gain uniformity and
simplicity.

It could be possible to show the package-provided prefix in the Directories
tab as a reference though.

By the way, all packages installed from source code should have a
package-provided default prefix of /usr/local (GNU coding standards,
Filesystem Hierarchy Standard), so I do not agree with the samba choice
here.

FHS:
http://www.pathname.com/fhs/pub/fhs-2.3.html#USRLOCALLOCALHIERARCHY



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