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

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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.
This commit is contained in:
Mark Adler
2012-08-12 18:08:52 -07:00
parent fb4e0599a5
commit 62d6112a79
16 changed files with 76 additions and 70 deletions
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3
zlib.h
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@@ -1022,7 +1022,8 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
the version of the header file.
*/
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
typedef unsigned (*in_func) OF((void FAR *,
z_const unsigned char FAR * FAR *));
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,