Enable GIO tests on Windows

1) Remove the non-Windows-only condition for subdir('tests').
2) Add libiphlpapi, libws2_32 and libsecur32 deps, needed for W32 tests.
3) Remove the -no-undefined argument (gcc doesn't understand it,
   it *does* understand -Wl,-no-undefined; either way, the test
   compiles without this argument just fine; maybe meson adds it
   by itself - you can hardly build shared modules without it).
4) Add or fix a number of includes
5) Disable gdbus-objectmanager tests when building with MSVC
   (right now these tests don't work on Windows anyway, so the fact
    that MSVC can't even build them properly is irrelevant;
    most likely gdbus-codegen needs changes to put _GLIB_EXTERN
    before each function)

gio/meson.build

@@ -979,7 +979,4 @@ if enable_systemtap
 endif
 
 subdir('fam')
-
-if host_system != 'windows'
-  subdir('tests')
-endif
+subdir('tests')

gio/tests/g-file-info.c

@@ -29,8 +29,9 @@
 #ifdef G_OS_WIN32
 #include <stdio.h>
 #include <glib/gstdio.h>
-#include <Windows.h>
-#include <Shlobj.h>
+#include <windows.h>
+#include <shlobj.h>
+#include <io.h> /* for _get_osfhandle */
 #endif
 
 #define TEST_NAME			"Prilis zlutoucky kun"

gio/tests/gdbus-serialization.c

@@ -22,7 +22,9 @@
 #include <gio/gio.h>
 
 #include <string.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 #include <dbus/dbus.h>
 
 /* ---------------------------------------------------------------------------------------------------- */

gio/tests/gdbus-tests.c

@@ -19,7 +19,9 @@
  */
 
 #include <gio/gio.h>
+#ifndef _MSC_VER
 #include <unistd.h>
+#endif
 
 #include "gdbus-tests.h"
 

gio/tests/meson.build

@@ -5,6 +5,10 @@ common_gio_tests_deps = [
   libgio_dep,
 ]
 
+if host_machine.system() == 'windows'
+  common_gio_tests_deps += [iphlpapi_dep, winsock2, cc.find_library ('secur32')]
+endif
+
 subdir('gdbus-object-manager-example')
 
 gengiotypefuncs_prog = find_program('gengiotypefuncs.py')
@@ -321,6 +325,10 @@ test_extra_programs += [{
     'extra_sources' : ['gtlsconsoleinteraction.c'],
     'install' : false,
   },
+}]
+
+if cc.get_id() != 'msvc'
+  test_extra_programs += [{
     # These three are manual-run tests because they need a session bus but don't bring one up themselves
     # FIXME: these build but don't seem to work!
     'gdbus-example-objectmanager-client' : {
@@ -335,7 +343,8 @@ test_extra_programs += [{
       'dependencies' : [libgdbus_example_objectmanager_dep],
       'install' : false,
     },
-}]
+  }]
+endif
 
 if host_machine.system() != 'windows'
   test_extra_programs += [{
@@ -357,13 +366,8 @@ if not meson.is_cross_build() or meson.has_exe_wrapper()
                '--c-name', '_g_plugin',
                '@INPUT@'])
 
-  if host_system == 'windows'
-    resource_plugin_platform_link_args = ['-no-undefined']
-  else
-    resource_plugin_platform_link_args = []
-  endif
   shared_module ('resourceplugin', 'resourceplugin.c', plugin_resources_c,
-    link_args : export_dynamic_ldflags + resource_plugin_platform_link_args,
+    link_args : export_dynamic_ldflags,
     dependencies : common_gio_tests_deps)
 
   test_gresource = custom_target('test.gresource',

gio/tests/modules/test-module-a.c

@@ -20,6 +20,8 @@
  * if advised of the possibility of such damage.
  */
 
+#include "config.h" /* for _GLIB_EXTERN */
+
 #include <gio/gio.h>
 
 #include "symbol-visibility.h"

gio/tests/modules/test-module-b.c

@@ -20,6 +20,8 @@
  * if advised of the possibility of such damage.
  */
 
+#include "config.h" /* for _GLIB_EXTERN */
+
 #include <gio/gio.h>
 
 #include "symbol-visibility.h"

gio/tests/readwrite.c

@@ -6,6 +6,9 @@
 #ifdef G_OS_UNIX
 #include <unistd.h>
 #endif
+#ifdef G_OS_WIN32
+#include <io.h> /* for close() */
+#endif
 
 static const char *original_data = "This is some test data that we can put in a file...";
 static const char *new_data = "new data..";