#168 how to fix compile error: "error C2065: 'GCL_HICON' : undeclared identifier"?

[Zhou Heng]

I'm trying to compile gnuplot under Windows 7 using Visual Studio 2012. When I cd into directory C:\.....\gnuplot-4.6.5\config\msvc in the Visual Studio x64 Cross Tools Command Prompt (2010) and run nmake, I got an error when compiling winmain.c:
..\..\src\win\winmain.c(560) : error C2065: 'GCL_HICON' : undeclared identifier
Could you please tell me how to fix this? Thank you.
PS: I disabled libgd and lua/tikz by setting GDLIB = 0 and LUA = 0 in the Makefile.

[Bastian Märkisch]

64bit builds were are not supported for 4.6.5. Current CVS and thus the upcoming 4.6.6 will support them.