LinuxQuestions.org - [SOLVED] Very basic clarification regarding USE flags for emerge

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gregorian

12-26-2009 08:32 AM

Very basic clarification regarding USE flags for emerge

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.

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