Log message:
devel/zlib: Work around zconf.h bug in NetBSD.
Even if the zconf.h bug is fixed in NetBSD release branches, we need
to work around this in pkgsrc for netbsd<11 binary package builds
that are made against the x.0 release which doesn't have the fix.
This will also require a revbump of all packages that potentially use
zlib builtin.mk to guarantee it takes effect in incremental package
builds.
PR lib/59711: "#define HAVE_UNISTD_H 1" breaks 32-bit libz

Log message:
zlib: include <unistd.h> in gzguts.h. Needed for close(2) in gzwrite.c.

Log message:
zlib: always include unistd.h on Linux
Newer compilers, such as gcc14 in Fedora 40, make calling undeclared
functions an error. zlib uses lseek, which is in unistd.h. The existing
zconf.h has complex logic to include unistd.h in some cases, when it should
probably just include it unconditionally.
Set -DZ_HAVE_UNISTD_H in CFLAGS.Linux. This should probably just be added
unconditionally, but I was hesitant to do so without asking.

Log message:
zlib: updated to 1.3.1
Changes in 1.3.1 (22 Jan 2024)
- Reject overflows of zip header fields in minizip
- Fix bug in inflateSync() for data held in bit buffer
- Add LIT_MEM define to use more memory for a small deflate speedup
- Fix decision on the emission of Zip64 end records in minizip
- Add bounds checking to ERR_MSG() macro, used by zError()
- Neutralize zip file traversal attacks in miniunz
- Fix a bug in ZLIB_DEBUG compiles in check_match()
- Various portability and appearance improvements
Changes in 1.3 (18 Aug 2023)
- Remove K&R function definitions and zlib2ansi
- Fix bug in deflateBound() for level 0 and memLevel 9
- Fix bug when gzungetc() is used immediately after gzopen()
- Fix bug when using gzflush() with a very small buffer
- Fix crash when gzsetparams() attempted for transparent write
- Fix test/example.c to work with FORCE_STORED
- Rewrite of zran in examples (see zran.c version history)
- Fix minizip to allow it to open an empty zip file
- Fix reading disk number start on zip64 files in minizip
- Fix logic error in minizip argument processing
- Add minizip testing to Makefile
- Read multiple bytes instead of byte-by-byte in minizip unzip.c
- Add memory sanitizer to configure (--memory)
- Various portability improvements
- Various documentation improvements
- Various spelling and typo corrections

Log message:
devel/zlib: add missing zlib.map

Log message:
devel/zlib: include the version script from upstream
Adding symbol versions to the shared library on Linux.
This brings zlib more in line what distro builds have on Linux, avoiding
lots of complaints in the case that you have to replace native zlib with
an upgraded version from pkgsrc (to build octave on CentOS 7.x, for
example).

Log message:
*/builtin.mk: Use ${_CROSS_DESTDIR:U} for build-time file checks.
These are questions about the target system, whose files at
build-time are all relative to ${_CROSS_DESTDIR} if it is defined,
i.e., if USE_CROSS_COMPILE is set to yes.
No change to native builds because ${_CROSS_DESTDIR:U} is empty in
them.  (Possible minor change by adding :Q to ${H_FOO} in command
lines, but if this makes a difference it likely fixes problems.)

Log message:
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