zlib/configure, branch v1.2.9

Avoid the need for ssize_t.

2016-12-31T18:06:40+00:00

Limit read() and write() requests to sizes that fit in an int. This allows storing the return value in an int, and avoiding the need to use or construct an ssize_t type. This is required for Microsoft C, whose _read and _write functions take an unsigned request and return an int.

Detect clang in cc version.

2016-12-31T04:00:57+00:00

Fix compile option for when z_size_t needs to be a long long.

2016-12-05T01:19:36+00:00

Create z_size_t and z_ssize_t types.

2016-12-04T15:48:48+00:00

Normally these are set to size_t and ssize_t. But if they do not exist, then they are set to the smallest integer type that can contain a pointer. size_t is unsigned and ssize_t is signed.

Add --debug (-d) option to ./configure to define ZLIB_DEBUG.

2016-12-04T15:39:37+00:00

Add --warn option to ./configure, instead of environment variable.

2016-10-12T05:21:04+00:00

Allow building zlib outside of the source directory.

2015-08-03T04:35:50+00:00

To build, simply run configure from the source directory by specifying its path. That path will be used to find the source files. The source directory will not be touched. All new and modified files will be made in the current directory. Discovered in the process that not all makes understand % or $<, and not all compilers understand -include or -I-. This required a larger Makefile.in with explicit dependencies.

Remove runtime check in configure for four-byte integer type.

2013-03-24T05:30:09+00:00

That didn't work when cross-compiling. Simply rely on limits.h. If a compiler does not have limits.h, then zconf.h.in should be modified to define Z_U4 as an unsiged four-byte integer type in order for crc32() to be fast. This also simplifies and makes more portable to check for a four- byte type using limits.h.

Fix configure for Sun shell.

2013-03-23T20:50:10+00:00

Clean up the usage of z_const and respect const usage within zlib.

2012-08-13T07:02:40+00:00

This patch allows zlib to compile cleanly with the -Wcast-qual gcc warning enabled, but only if ZLIB_CONST is defined, which adds const to next_in and msg in z_stream and in the in_func prototype. A --const option is added to ./configure which adds -DZLIB_CONST to the compile flags, and adds -Wcast-qual to the compile flags when ZLIBGCCWARN is set in the environment.