Enable Control Flow Guard in Windows executables

Add /guard:cf flag to compilation and linking steps in make_win64.mak to
enable Control Flow Guard protection. Stack protection with -GS flag was
already enabled.

Fixes #851

Author: Copilot

features/org.eclipse.equinox.executable.feature/library/win32/make_win64.mak

@@ -49,15 +49,15 @@ DLL_OBJS	= eclipse.obj  eclipseWin.obj  eclipseUtil.obj  eclipseJNI.obj eclipseS
 
 cdebug	= -Ox -DNDEBUG
 cvarsmt	= -D_MT -MT
-cflags	= $(cdebug) -DUNICODE -D_UNICODE -DCOBJMACROS /c -DUSE_ASSEMBLER -GS -DWIN64 -D_WIN64 $(cvarsmt) $(CFLAGS)
+cflags	= $(cdebug) -DUNICODE -D_UNICODE -DCOBJMACROS /c -DUSE_ASSEMBLER -GS /guard:cf -DWIN64 -D_WIN64 $(cvarsmt) $(CFLAGS)
 LIBS   = kernel32.lib user32.lib comctl32.lib libcmt.lib \
 	libvcruntime.lib libucrt.lib ole32.lib windowscodecs.lib
 DLL_LIBS = kernel32.lib user32.lib comctl32.lib gdi32.lib Advapi32.lib libcmt.lib version.lib \
 	libvcruntime.lib libucrt.lib ole32.lib windowscodecs.lib
-LFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /NODEFAULTLIB /INCREMENTAL:NO /RELEASE /NOLOGO -subsystem:windows -entry:wmainCRTStartup
-CONSOLEFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /NODEFAULTLIB /INCREMENTAL:NO /RELEASE /NOLOGO -subsystem:console -entry:wmainCRTStartup
+LFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /guard:cf /NODEFAULTLIB /INCREMENTAL:NO /RELEASE /NOLOGO -subsystem:windows -entry:wmainCRTStartup
+CONSOLEFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /guard:cf /NODEFAULTLIB /INCREMENTAL:NO /RELEASE /NOLOGO -subsystem:console -entry:wmainCRTStartup
 #DLL_LFLAGS = /NODEFAULTLIB /INCREMENTAL:NO /PDB:NONE /RELEASE /NOLOGO -entry:_DllMainCRTStartup@12 -dll /BASE:0x72000000 /DLL
-DLL_LFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /NODEFAULTLIB /INCREMENTAL:NO /PDB:NONE /RELEASE /NOLOGO  -dll /BASE:0x140000000 /DLL
+DLL_LFLAGS = /DYNAMICBASE /NXCOMPAT /HIGHENTROPYVA /guard:cf /NODEFAULTLIB /INCREMENTAL:NO /PDB:NONE /RELEASE /NOLOGO  -dll /BASE:0x140000000 /DLL
 RES	= $(PROGRAM_NAME).res
 EXEC	= $(PROGRAM_OUTPUT)
 CONSOLE = $(PROGRAM_NAME)c.exe