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⁠19.2.4. Libraries required by RPM

Rather than invent everything from scratch, the RPM system makes use of a number of libraries, including those listed in Table 20-2.
Table 20-2 Libraries used by RPM
Library
Purpose
Berkeley DB
RPM database, using db1 and db3
bzip2
Compression
gettext
International text lookup
gpg
For digital signatures
gzip
Compression
popt
Processing command-line options
zlib
Compression
Read through the INSTALL file to find out where you can download versions of these libraries. You may find that each library has its own set of dependencies, all of which you need to port to your target platform.