On Mon, Nov 11, 2019 at 8:02 PM The Wanderer <wande...@fastmail.fm> wrote:
> On 2019-11-11 at 22:39, Dan Hitt wrote: > > > I installed the package libmypaint1.3.0 on my debian 10 system. > > > > I can tell it is installed because when i run the command > > sudo apt-get install libmypaint-1.3.0 > > the system responds with "libmypaint-1.3-0 is already the newest > version". > > > > It also says "libmypaint-1.3-0 set to manually installed", which i do not > > know how to interpret. > > If you install a package named foo, and that package depends on another > one named libbar, libbar will be installed but marked as automatically > installed. What that means in practice is that if you later remove foo, > apt will detect that nothing needs to keep libbar around, and will > suggest that you might want to remove it. (At least I believe that's the > default configuration.) > > If you want to keep libbar around for other reasons - for example, if > you've compiled a program which loads that library, but haven't built a > package to let apt know about that - then you can mark libbar as > manually installed, and apt won't suggest removing it anymore. > > In practice doing this with library packages directly is usually not a > great idea; it's usually better to do it with the matching -dev package > instead. Speaking of which: > > > Nevertheless, if i run the command > > pkg-config --exists --print-errors "libmypaint >= 1.3.0" > > i get the message "No package 'libmypaint' found" (and exit status 1). > > package-config draws on .pc files. > > $ apt-file search libmypaint.pc > libmypaint-dev: /usr/lib/x86_64-linux-gnu/pkgconfig/libmypaint.pc > > The .pc file for libmypaint is in libmypaint-dev, not in libmypaint-1.3-0. > > Try installing the -dev package. > > -- > The Wanderer > > The reasonable man adapts himself to the world; the unreasonable one > persists in trying to adapt the world to himself. Therefore all > progress depends on the unreasonable man. -- George Bernard Shaw > > Awesome, thank you so much Wanderer! I installed libmypaint-dev, and now pkg-config sees the package as you predicted. dan
