small .h trick for faster win32 interp compiles, cl.exe in the prompt is

much faster eye. PERL_CORE only, since CPAN XS assumes the built-in out
the box headers/tokens/structs/linker libs selected by p5p decades ago,
will never change.

Author: bulk88

win32/perllib.c

@@ -6,10 +6,12 @@
  *     [Frodo on p.73 of _The Lord of the Rings_, I/iii: "Three Is Company"]
  */
 #define PERLIO_NOT_STDIO 0
+#define PERL_IN_WIN32_PERLLIB_C
 #include "EXTERN.h"
 #include "perl.h"
 
 #include "XSUB.h"
+#include <winuser.h>
 
 #ifdef PERL_IMPLICIT_SYS
 #include "win32iop.h"

win32/win32.h

@@ -110,6 +110,58 @@
 #  define PERL_STATIC_FORCE_INLINE_NO_RET __declspec(noreturn) __forceinline static
 #endif
 
+#ifdef PERL_CORE
+#define VC_EXTRALEAN
+#define NOCRYPT
+#define NOTAPE
+#define NOIMAGE
+#define NOPROXYSTUB
+#define NORPC
+#define NOGDICAPMASKS     /* CC_*, LC_*, PC_*, CP_*, TC_*, RC_ */
+#define NOVIRTUALKEYCODES /* VK_ */
+#ifndef PERL_IN_WIN32_PERLLIB_C
+#define NOWINMESSAGES     /* WM_*, EM_*, LB_*, CB_* */
+#endif
+#define NOWINSTYLES       /* WS_*, CS_*, ES_*, LBS_*, SBS_*, CBS_* */
+#define NOSYSMETRICS      /* SM_* */
+#define NOMENUS           /* MF_* */
+#define NOICONS           /* IDI_* */
+#define NOKEYSTATES       /* MK_* */
+#define NOSYSCOMMANDS     /* SC_* */
+#define NORASTEROPS       /* Binary and Tertiary raster ops */
+#define NOSHOWWINDOW      /* SW_* */
+#define OEMRESOURCE       /* OEM Resource values */
+#define NOATOM            /* Atom Manager routines */
+#define NOCLIPBOARD       /* Clipboard routines */
+#define NOCOLOR           /* Screen colors */
+#define NOCTLMGR          /* Control and Dialog routines */
+#define NODRAWTEXT        /* DrawText() and DT_* */
+#define NOGDI             /* All GDI defines and routines */
+#define NOKERNEL          /* All KERNEL defines and routines */
+#ifndef PERL_IN_WIN32_PERLLIB_C
+#define NOUSER            /* All USER defines and routines */
+#endif
+//#define NONLS             /* All NLS defines and routines */
+#define NOMB              /* MB_* and MessageBox() */
+#define NOMEMMGR          /* GMEM_*, LMEM_*, GHND, LHND, associated routines*/
+#define NOMETAFILE        /* typedef METAFILEPICT */
+#define NOMINMAX          /* Macros min(a,b) and max(a,b) */
+#define NOMSG             /* typedef MSG and associated routines */
+#define NOOPENFILE        /* OpenFile(), OemToAnsi, AnsiToOem, and OF_**/
+#define NOSCROLL          /* SB_* and scrolling routines */
+#define NOSERVICE         /* All Service Controller routines, SERVICE_ equates, etc. */
+#define NOSOUND           /* Sound driver routines */
+#define NOTEXTMETRIC      /* typedef TEXTMETRIC and associated routines */
+#define NOWH              /* SetWindowsHook and WH_* */
+#define NOWINOFFSETS      /* GWL_*, GCL_*, associated routines */
+#define NOCOMM            /* COMM driver routines */
+#define NOKANJI           /* Kanji support stuff. */
+#define NOHELP            /* Help engine interface. */
+#define NOPROFILER        /* Profiler interface. */
+#define NODEFERWINDOWPOS  /* DeferWindowPos routines */
+#define NOMCX             /* Modem Configuration Extensions */
+
+#endif
 #define  WIN32_LEAN_AND_MEAN
 #include <windows.h>