The latter two are always defined in sys/types.h on all Unix systems and
we already define them for MSVC (which doesn't use configure anyhow).
The former type is always defined everywhere.
This type should always be defined in sys/types.h on any non-ancient
Unix system, so don't bother checking for it, which is not only wasteful
but can even be harmful because it can conflict with pid_t definitions
in the other libraries under Windows, where we (wrongly) define it as
int (which is actually a bug in autoconf, which was recently fixed, see
https://savannah.gnu.org/support/index.php?110296) when using CMake.
So just don't define it at all: it should be already defined under Unix
and we don't use it under MSW anyhow.
See https://github.com/microsoft/vcpkg/issues/19110
See #18150.
Using non-PCRE system regex library, which was the only build variant
when wxHAS_REGEX_ADVANCED was not defined, is not supported any more, so
simplify the code by not testing for it.
This is useless, all still supported compilers except ancient MSVS
versions (for which configure is not used anyhow) support variadic
macros, so don't waste time testing for them.
Note that the checks for HAVE_VARIADIC_MACROS in the sources are still
left because it is still possible to explicitly disable variadic macros
support using --disable-vararg_macros for strict C++98 compatibility.
All still supported versions of MinGW/Cygwin provide w32api.h file, so
there is no need to test for it.
This allows to simplify the code, but also remove the definition of
HAVE_W32API_H from bake- and makefiles and this, in turn, allows to get
rid of extra flags in MinGW format entirely, as we don't support gcc
2.95 for which they were originally needed neither.
Remove separate checks for dlerror() which don't seem to be needed under
any platform any longer.
No real changes, just slim down configure/CMake a tiny bit.
This function is not used any more since e289eb07e1 (Get rid of
non-POSIX code for loading dynlibs on *nix, 2020-05-13), so don't check
for it and don't defined the corresponding HAVE_SHL_LOAD symbol.
This is not really an option as building requires it to be 1, so don't
make it one in setup.h/configure/cmake and just hardcode it as 1 for
compatibility.
Closes#18558.
This constant wasn't very useful as it contained the description of the OS on
the machine where the library was built, not the one on which the application
using it was running. It also wasn't used anywhere in wxWidgets and apparently
wasn't meant to be used outside of it.
Finally, putting the output of `uname -r` into it created problems with
creating reproducible builds as just a change in the kernel version changed
the build results.
Closes#17002.
Use AC_CACHE_CHECK() to avoid recompiling the test program(s) every time
configure runs and also simplify the checks. This required renaming
ac_wxgtkXXX to wx_cv_gtkXXX (cached variables must have "cv" in them).
Also make the checks more logical, by simply setting wx_cv_gtkXXX if
wx_cv_gtkYYY is set with XXX < YYY.
Finally, and the real reason for these changes, add test for __WXGTK220__
which will be used by the upcoming commits to check whether GtkSpinner is
available.
