Gentoo Archives: gentoo-user

From: Mick <michaelkintzios@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] what does the "USE flags" section of the packages.gentoo.org/package page mean?
Date: Mon, 16 Dec 2019 17:25:52
Message-Id: 1744357.DC2qFbYGg9@localhost
In Reply to: [gentoo-user] what does the "USE flags" section of the packages.gentoo.org/package page mean? by n952162
1 On Monday, 16 December 2019 17:10:13 GMT n952162 wrote:
2 > I tried using imagemagick's display, and it gave me:
3 >
4 > display: delegate library support not built-in '' (X11)
5 >
6 > There's no X on the media-gfx/imagemagick web page.
7 >
8 > On a guess, I created a use file for imagemagick with X and now I get:
9 >
10 > display: no decode delegate for this image format `JPG'
11 >
12 > Am I going to have to rebuild imagemagick for every file type I encounter?
13
14 Not sure what are the defaults, but I have USE="jpeg" here:
15
16 ~ $ equery u imagemagick
17 [ Legend : U - final flag setting for installation]
18 [ : I - package is installed with flag ]
19 [ Colors : set, unset ]
20 * Found these USE flags for media-gfx/imagemagick-7.0.9.5:
21 U I
22 + + X : Add support for X11
23 + + bzip2 : Use the bzlib compression library
24 - - corefonts : Use media-fonts/corefonts which is required by some
25 commands
26 + + cxx : Build support for C++ (bindings, extra libraries, code
27 generation, ...)
28 - - djvu : Support DjVu, a PDF-like document format esp. suited for
29 scanned documents
30 - - fftw : Use FFTW library for computing Fourier transforms
31 - - fontconfig : Support for configuring and customizing font access via
32 media-libs/fontconfig
33 - - fpx : Enable media-libs/libfpx support
34 - - graphviz : Add support for the Graphviz library
35 - - hdri : Enable High Dynamic Range Images formats
36 - - heif : Enable support for ISO/IEC 23008-12:2017 HEIF/HEIC image
37 format using
38 media-libs/libheif
39 - - jbig : Enable jbig-kit support for tiff, Hylafax, ImageMagick, etc
40 + + jpeg : Add JPEG image support
41 - - jpeg2k : Support for JPEG 2000, a wavelet-based image compression
42 format
43 + + lcms : Add lcms support (color management engine)
44 - - lqr : Enable experimental liquid rescale support using media-
45 libs/liblqr
46 - - lzma : Support for LZMA (de)compression algorithm
47 - - openexr : Support for the OpenEXR graphics file format
48 + + openmp : Build support for the OpenMP (support parallel computing),
49 requires
50 >=sys-devel/gcc-4.2 built with USE="openmp"
51 + + pango : Enable Pango support using x11-libs/pango
52 - - perl : Add optional support/bindings for the Perl language
53 + + png : Add support for libpng (PNG images)
54 - - postscript : Enable support for the PostScript language (often with
55 ghostscript-gpl or
56 libspectre)
57 - - q32 : Set quantum depth value to 32
58 - - q8 : Set quantum depth value to 8
59 - - raw : Add support for raw image formats
60 - - static-libs : Build static versions of dynamic libraries as well
61 + + svg : Add support for SVG (Scalable Vector Graphics)
62 - - test : Enable dependencies and/or preparations necessary to run
63 tests (usually
64 controlled by FEATURES=test but can be toggled
65 independently)
66 + + tiff : Add support for the TIFF image format
67 + + truetype : Add support for FreeType and/or FreeType2 fonts
68 - - webp : Add support for the WebP image format
69 - - wmf : Add support for the Windows Metafile vector image format
70 + + xml : Add support for XML files
71 + + zlib : Add support for zlib (de)compression
72
73 --
74 Regards,
75
76 Mick

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