[SOLVED] Very basic clarification regarding USE flags for emerge

gregorian · 12-26-2009, 08:32 AM

I'm trying to install python with the sqlite use flag. I entered python/ sqlite in the /etc/portage/package.use and then entered emerge -pv python. This is what I got:

Code:

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] dev-lang/python-2.6.4  USE="berkdb gdbm ipv6 ncurses readline ssl threads (wide-unicode) xml -build -doc -examples -sqlite -tk -wininst" 10,760 kB

Total: 1 package (1 reinstall), Size of downloads: 10,760 kB

Why is -sqlite set?

Why does

Code:

#USE=sqlite emerge -pv python

show what I want while

Code:

#USE=sqlite
#emerge -pv python

doesn't work?

~sHyLoCk~ · 12-26-2009, 09:05 AM

You need to enable the use flag in package.use, by default it's disabled.

verdeboy2k · 12-26-2009, 09:28 AM

also, (assuming bash)

Code:

export USE="sqlite"
emerge python

would exhibit the desired behavior.

dxqcanada · 12-26-2009, 09:31 AM

Code:

dev-lang/python sqlite

in your /etc/portage/package.use should work.

Code:

6510b ~ # echo "dev-lang/python sqlite" >> /etc/portage/package.use
6510b ~ # emerge -av python

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R   ] dev-lang/python-2.6.4  USE="berkdb gdbm ipv6 ncurses readline sqlite* ssl threads (wide-unicode) xml -build -doc -examples -tk -wininst" 0 kB

gregorian · 12-26-2009, 11:08 AM

I made the mistake of omitting dev-lang in dev-lan/python.

Quote:

export USE="sqlite"
emerge python

Your suggestion worked. What's the difference between USE="sqlite" and export USE="sqlite" as long as I execute the former in the shell directly?

Thank you both!

verdeboy2k · 12-30-2009, 07:41 AM

Basically, each command line is its own individual shell script. If you don't export the variable, it isn't added to your environment for that bash session.