Arch Linux

Description: The movit.pc file installed with 'movit' depends on 'eigen3', but no eigen3.pc file is installed by movit, nor by any of its dependencies.

This is relevant whenever one wants to depend on movit via pkg-config.
It bites me specifically because a tool I use reads in the entire pkg-config database, which fails when any package within it is broken (like movit.pc is).


Additional info:
* movit 1.7.1-1


Steps to reproduce:

```
~$ pacman -Qo /usr/lib/pkgconfig/movit.pc
/usr/lib/pkgconfig/movit.pc is owned by movit 1.7.1-1

~$ cat /usr/lib/pkgconfig/movit.pc
# Movit pkg-config source file.

prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include
datarootdir=${prefix}/share
datadir=${datarootdir}
shaderdir=${datarootdir}/movit

Name: movit
Description: Movit is a library for high-quality, high-performance video filters.
Version: git
Requires: epoxy eigen3
Requires.private: fftw3
Conflicts:
Libs: -lmovit
Cflags: -I${includedir}/movit

~$ pkg-config --modversion movit
Package eigen3 was not found in the pkg-config search path.
Perhaps you should add the directory containing `eigen3.pc'
to the PKG_CONFIG_PATH environment variable
Package 'eigen3', required by 'movit', not found

(1) ~$ pkg-config --modversion eigen3
Package eigen3 was not found in the pkg-config search path.
Perhaps you should add the directory containing `eigen3.pc'
to the PKG_CONFIG_PATH environment variable
Package 'eigen3', required by 'virtual:world', not found

(1) ~$ pacman -Ql $(pactree movit -u) | grep -F .pc | cut -d' ' -f2- | sort -u | grep eigen

(1) ~$ pacman -Ql $(pactree movit -u) | grep -F .pc | cut -d' ' -f2- | sort -u | xargs grep eigen
/usr/lib/pkgconfig/movit.pc:Requires: epoxy eigen3

~$
```

The last two commands show that none of the transitive dependencies of 'movit' include a file with the string "eigen" in the name, nor in their contents (except for the dependency line in movit.pc, of course).