From [via email@example.com]" <@21:1/5 to All on Tue May 2 01:19:50 2023
This is a port of zlib 1.2.13 to MSDOS/DJGPP.
zlib 1.2 is a free, general purpose data compression/decompression library
as used in gzip. All the code is thread safe.
DJGPP specific changes.
There are no DJGPP specific changes. Only the usual configuration
files have been added. They are located in the "djgpp" directory.
The port has been configured and compiled on WinXP SP3, Win98SE and
MSDOS 6.22 with DOSLFN v0.41f. There is no guarantee that this may
be possible with any other DOS-like OS. Due to the use of long file
names it will not be possible to configure and compile without LFN
support. The port has been compiled using gcc346 and bnu2351b.
The port has been tested by using it. I have used them only on WinXP.
It has worked flawlessly. I do not konw if this will ever be the case
on FreeDOS. I have never used/tested them in that environment.
To be able to build this port you may need to have LFN support.
As usual, all djgpp specific files (diffs, README files, etc.) are stored in
the "djgpp" directory. The sources have been configured to be build in the
"0build" directory. If for some reason it does not work for you, delete its
contents and configure from scratch again.
For further information about zlib please read the docs and
Here is an extract of the home page showing the user visible changes
from the last port (zlib 1.2.12) to this one:
Fix a bug when getting a gzip header extra field with inflateGetHeader(). This remedies CVE-2022-37434.
Fix a bug in block type selection when Z_FIXED used. Now the smallest block type is selected, for better compression.
Fix a configure issue that discarded the provided CC definition.
Correct incorrect inputs provided to the CRC functions. This mitigates a bug in Java.
Repair prototypes and exporting of the new CRC functions.
Fix inflateBack to detect invalid input with distances too far.
Due to the first bug fix, any installations of 1.2.12 or earlier should be replaced with 1.2.13.