[Description][1]:
> QPDF is a command-line program that does structural, content-preserving
> transformations on PDF files. It could have been called something like
> pdf-to-pdf. It also provides many useful capabilities to developers of
> PDF-producing software or for people who just want to look at the
> innards of a PDF file to learn more about how they work.
>
> QPDF is capable of creating linearized (also known as web-optimized)
> files and encrypted files. It is also capable of converting PDF files
> with object streams (also known as compressed objects) to files with no
> compressed objects or to generate object streams from files that don't
> have them (or even those that already do). QPDF also supports a special
> mode designed to allow you to edit the content of PDF files in a text
> editor. For more details, please see the documentation links below.
>
> QPDF includes support for merging and splitting PDFs through the ability
> to copy objects from one PDF file into another and to manipulate the
> list of pages in a PDF file. The QPDF library also makes it possible for
> you to create PDF files from scratch. In this mode, you are responsible
> for supplying all the contents of the file, while the QPDF library takes
> care off all the syntactical representation of the objects, creation of
> cross references tables and, if you use them, object streams,
> encryption, linearization, and other syntactic details.
>
> QPDF is not a PDF content creation library, a PDF viewer, or a program
> capable of converting PDF into other formats. In particular, QPDF knows
> nothing about the semantics of PDF content streams. If you are looking
> for something that can do that, you should look elsewhere. However, once
> you have a valid PDF file, QPDF can be used to transform that file in
> ways perhaps your original PDF creation can't handle. For example,
> programs generate simple PDF files but can't password-protect them,
> web-optimize them, or perform other transformations of that type.
cups-filters 1.22.5 requires this version.
checking for LIBQPDF... no
configure: error: Package requirements (libqpdf >= 8.3.0) were not met:
Requested 'libqpdf >= 8.3.0' but version of libqpdf is 6.0.0
Take QPDF out of `/package/tonerlow` and put it into the system for
easier maintenance.
[1]: http://qpdf.sourceforge.net/