Голые факты:

$ rpm -qv pkg-config
pkg-config-0.19-alt1
$ rpm -qv pkgconfig
предупреждение: пакет pkgconfig не установлен

$ apt-cache showpkg pkgconfig
Package: pkgconfig
Versions: 
1:0.17.2-alt2(/var/lib/apt/lists/ftp.altlinux.com_pub_distributions_ALTLinux_Sisyphus_i586_base_pkglist.classic)
<skip />
Provides: 
1:0.17.2-alt2 - /usr/lib/pkgconfig 
Reverse Provides: 
pkg-config 0.19-alt1

$ ls -al
/var/lib/apt/lists/ftp.altlinux.com_pub_distributions_ALTLinux_Sisyphus_i586_base_pkglist.classic
-rw-r--r--  1 root root 17680720 Сен 21 22:13
/var/lib/apt/lists/ftp.altlinux.com_pub_distributions_ALTLinux_Sisyphus_i586_base_pkglist.classic

# apt-get dist-upgrade
Reading Package Lists... Done
Building Dependency Tree... Done
Calculating Upgrade... Done
0 upgraded, 0 newly installed, 0 removed and 0 not upgraded.

# apt-get install pkgconfig
Reading Package Lists... Done
Building Dependency Tree... Done
The following packages will be REMOVED:
  pkg-config
The following NEW packages will be installed:
  pkgconfig
0 upgraded, 1 newly installed, 1 removed and 1 not upgraded.
Need to get 39.2kB of archives.
After unpacking 8522B disk space will be freed.
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