2 Frequently Asked Questions about zlib
5 If your question is not there, please check the zlib home page
6 http://www.cdrom.com/pub/infozip/zlib/ which may have more recent information.
9 1) I need a Windows DLL
10 2) I need a Visual Basic interface to zlib
11 3) compress() returns Z_BUF_ERROR
12 4) deflate or inflate returns Z_BUF_ERROR
13 5) Where is the zlib documentation (man pages, etc...)?
14 6) Why don't you use GNU autoconf, libtool, etc...?
15 7) There is a bug in zlib.
16 8) I get "undefined reference to gzputc"
20 1) I need a Windows DLL
22 The zlib sources can be compiled without change to produce a DLL.
23 If you want a precompiled DLL, see http://www.winimage.com/zLibDll
26 2) I need a Visual Basic interface to zlib
28 See http://www.tcfb.com/dowseware/cmp-z-it.zip
29 http://web2.airmail.net/markn/articles/zlibtool/zlibtool.htm
30 and contrib/visual-basic.txt
32 3) compress() returns Z_BUF_ERROR
34 Make sure that before the call of compress, the length of the
35 compressed buffer is equal to the total size of the compressed buffer
36 and not zero. For Visual Basic, check that this parameter is passed
37 by reference ("as any"), not by value ("as long").
40 4) deflate or inflate returns Z_BUF_ERROR
42 Make sure that before the call avail_in and avail_out are not zero.
45 5) Where is the zlib documentation (man pages, etc...)?
47 It's in zlib.h for the moment. Volunteers to transform this
48 to man pages, please contact jloup@gzip.org. Examples of zlib usage
49 are in the files example.c and minigzip.c.
52 6) Why don't you use GNU autoconf, libtool, etc...?
54 Because we would like to keep zlib as a very small and simple package.
55 zlib is rather portable and doesn't need much configuration.
58 7) There is a bug in zlib.
60 Most of the time, such problems are due to an incorrect usage
61 of zlib. Please try to reproduce the problem with a small
62 program and send us the corresponding source at zlib@quest.jpl.nasa.gov
63 Do not send multi-megabyte data files without prior agreement.
66 8) I get "undefined reference to gzputc"
68 If "make test" produces something like
69 example.o(.text+0x174):
70 check that you don't have old files libz.* in /usr/lib, /usr/local/lib
71 or /usr/X11R6/lib. Remove old versions then do "make install".