zlib's minizip has SONAME 1. MZ_COMPAT intends to provide ABI and API compatibility,
so its SONAME should match.
The layout with this is:
```
libminizip.so -> libminizip.so.1
libminizip.so.1 -> libminizip.so.4.0.0
libminizip.so.4.0.0
```
Signed-off-by: Sam James <sam@gentoo.org>
Setting _POSIX_C_SOURCE on OpenBSD breaks the build. _BSD_SOURCE needs
to be set at the same time to enable some functions.
In file included from /home/brad/tmp/ffmpeg-ports/ports/pobj/minizip-4.0.0/minizip-ng-4.0.0/test/test_main.cc:5:
In file included from /usr/local/include/gtest/gtest.h:55:
In file included from /usr/include/c++/v1/ostream:140:
In file included from /usr/include/c++/v1/locale:218:
/usr/include/c++/v1/__bsd_locale_fallbacks.h:122:17: error: use of undeclared identifier 'vasprintf'; did you mean 'vsprintf'?
int __res = vasprintf(__s, __format, __va);
^
/usr/include/c++/v1/cstdio:124:9: note: 'vsprintf' declared here
using ::vsprintf _LIBCPP_USING_IF_EXISTS;
^
In file included from /home/brad/tmp/ffmpeg-ports/ports/pobj/minizip-4.0.0/minizip-ng-4.0.0/test/test_main.cc:5:
In file included from /usr/local/include/gtest/gtest.h:55:
In file included from /usr/include/c++/v1/ostream:140:
In file included from /usr/include/c++/v1/locale:218:
/usr/include/c++/v1/__bsd_locale_fallbacks.h:122:27: error: cannot initialize a parameter of type 'char *' with an lvalue of type 'char **'
int __res = vasprintf(__s, __format, __va);
^~~
/usr/include/stdio.h:269:21: note: passing argument to parameter here
int vsprintf(char *, const char *, __va_list);
^
2 errors generated.
Using `cmake_dependent_option` overrides a previously set directory
scope MZ_FETCH_LIBS variable. This means if a project sets MZ_FETCH_LIBS
before adding minizip-ng as a subdirectory in order to force it to fetch
zlib, it will set the variable to OFF, only use `find_library` and never
fetch zlib on non-WIN32 systems. This is a regression from previous
behaviour.
Instead, revert back to using `option` as this obeys a directory scope
MZ_FETCH_LIBS variable set by a parent directory, allowing said parent
directory to control zlib version.
Non-UNIX platforms may support POSIX, partly or fully, through a
compatibility layer of some kind. If a non-Windows platform does not
have the UNIX CMake variable set, take the POSIX path through the CMake
anyway.
The current `liblzma` makes linke look for `libliblzma` as the `lib` prefix is added automatically. This is breaking static linking of library when using pkg-config for resolving dependencies.
