On Visual Studio, unlike MinGW, manifest files are embedded via
including the manifest file as a resource file in the projects, not
via the .rc file. This means that the line in the .rc file that
specifies the manifest file would cause trouble, so that line gets
removed when the full gtk3-win32.rc is generated on Visual Studio builds,
otherwise 2010+ Visual Studio will complain when compiling the .rc file.
Also, the inclusion of winuser.h will cause warnings during the
compilation of the .rc file.
Fix this by isolating the Win32 resource portions of gtk-win32.rc.in to
gtk-win32.rc.body.in and:
-On MinGW, construct the full gtk-win32.rc by doing the winver.h and
winuser.h inclusion first, then append the contents of gtk-win32.rc.body,
and then appending the line to embed the manifest file.
-On Visual Studio, simply copy the gtk-win32.rc.body to gtk-win32.rc,
and generate the full libgtk3.manifest file.
https://bugzilla.gnome.org/show_bug.cgi?id=762311
This partially reverts de16a4e.
As we now ensure that items using GResources and GConstructors are always
referenced so that the linker does not optimize them out in a default
Release build, we no longer need to enforce the use of /LTCG, so
/LTCG:incremental will work as well.
MSVC 2015 changed its default link-time code generation setting to
/LTCG:incremental, which causes problems if /opt:noref is to be used,
meaning that some code will be optimized out by the linker.
Avoid this situtation here by enforcing the use of /LTCG for MSVC 2010+
builds.
This updates the Visual Studio Project GUIDs so that they don't repeat with
the GTK+-2.24.x ones, as the 3.x projects can be used with the 2.24.x in a
all-in-one solution file (such as when one wants to use a complete GTK+2
and GTK+3 stack when porting Windows applications from GTK+2 to GTK+3), and
each project in a solution file is expected to have an unique GUID.
We need to rename the projects so that when these projects are added
into an all-in-one solution file that will build the GTK+ 2/3 stack,
the names of the projects will not collide with the GTK+-2.x ones,
especially as GTK+-2.x and GTK+-3.x are done to co-exist on the same
system. This is due to the case that the MSVC projects are directly
carried over from the GTK+-2.x ones and was then updated for 3.x.
We still need to update the GUIDs of the projects, so that they won't
conflict with the GTK+-2.x ones.
