Bug 310207

Summary:	dev-libs/boost: add useflags to enable/disable boost libraries
Product:	Gentoo Linux	Reporter:	Hanno Zysik (geki) <h.mth>
Component:	New packages	Assignee:	Tiziano Müller (RETIRED) <dev-zero>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	alecm_88, bugzie, cpp+disabled, hwoarang, nikoli, SebastianLuther
Priority:	High
Version:	10.0
Hardware:	All
OS:	Linux
URL:	https://forums.gentoo.org/viewtopic-t-819332.html
Whiteboard:
Package list:		Runtime testing required:	---

Description Hanno Zysik (geki) 2010-03-19 12:54:43 UTC

There are already useflags for [mpi] and [python].

A list of all the libraries that come with boost 1_42_0:
- date_time filesystem graph graph_parallel iostreams math mpi program_options python random regex serialization signals system test thread wave

At least math, regex, test & wave libraries have a longer compile-time. It would be good to make them optional.

Another idea I have had is to make an eclass for boost to reduce maintenance. Though, I wonder how often the build system changes that drastically that would drive it useless to make an eclass for boost.

Well, just some thoughts. :)

Comment 1 Hanno Zysik (geki) 2010-03-19 13:28:28 UTC

If you do not want to spam IUSE with options there is an alternative.

An example is the apache2 package. It has an environment variable to set its modules to be built. There are surely even other ways possible.

$ grep ^APACHE /etc/make.conf 
APACHE2_MODULES="actions alias auth_basic ..."
APACHE2_MPMS="worker"

Comment 2 Hanno Zysik (geki) 2011-07-27 11:25:51 UTC

I finally managed to create a boost eclass with use flags for boost libraries.

ebuild: http://code.google.com/p/gekis-playground/source/browse/trunk/dev-libs/boost/boost-1.47.0-r1.ebuild
eclass: http://code.google.com/p/gekis-playground/source/browse/trunk/eclass/boost-monolithic.eclass

The regex DEPEND may be moved to the ebuild. The REQUIRED_USE likewise.
Improvements and ideas are welcomed!

I will not add eselect support. That is up to whoever wants that!

___
The boost headers should be in an own ebuild for not copying each header file into the image separately. Sane projects may require boost headers but no boost libraries.

ebuild: http://code.google.com/p/gekis-playground/source/browse/trunk/dev-libs/boost-headers/boost-headers-1.47.0.ebuild
eclass: http://code.google.com/p/gekis-playground/source/browse/trunk/eclass/boost-headers.eclass

Comment 3 Tiziano Müller (RETIRED) gentoo-dev

2012-08-20 19:29:11 UTC


*** This bug has been marked as a duplicate of bug 260404 ***