WIP: Add excerpts from TCL / Tk header

Add parts of TCL / Tk headers needed to compile. If this header is enough, and correct across platforms, then we should be able to remove the complicated TCL / Tk search algorithms at build time.
matplotlib · efiring · May 24, 2016 · May 17, 2016 · May 17, 2016 · May 18, 2016
commit 94bb4577e1ca15a567ca27601907c09a558f1a41
diff --git a/src/_tkagg.cpp b/src/_tkagg.cpp
@@ -20,16 +20,7 @@
 
 extern "C"
 {
-#ifdef __APPLE__
-#  ifdef TK_FRAMEWORK
-#     include <Tcl/tcl.h>
-#     include <Tk/tk.h>
-#  else
-#     include <tk.h>
-#  endif
-#else
-#  include <tk.h>
-#endif
+#include "_tkmini.h"
 }
 
 #if defined(_MSC_VER)

diff --git a/src/_tkmini.h b/src/_tkmini.h
@@ -0,0 +1,91 @@
+/* Small excerpts from the Tcl / Tk 8.6 headers
+ *
+ * License terms copied from:
+ * http://www.tcl.tk/software/tcltk/license.html
+ * as of 20 May 2016.
+ *
+ * Copyright (c) 1987-1994 The Regents of the University of California.
+ * Copyright (c) 1993-1996 Lucent Technologies.
+ * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ * Copyright (c) 1998-2000 by Scriptics Corporation.
+ * Copyright (c) 2002 by Kevin B. Kenny.  All rights reserved.
+ *
+ * This software is copyrighted by the Regents of the University
+ * of California, Sun Microsystems, Inc., Scriptics Corporation,
+ * and other parties. The following terms apply to all files
+ * associated with the software unless explicitly disclaimed in
+ * individual files.
+ *
+ * The authors hereby grant permission to use, copy, modify,
+ * distribute, and license this software and its documentation
+ * for any purpose, provided that existing copyright notices are
+ * retained in all copies and that this notice is included
+ * verbatim in any distributions. No written agreement, license,
+ * or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their
+ * authors and need not follow the licensing terms described
+ * here, provided that the new terms are clearly indicated on
+ * the first page of each file where they apply.
+ *
+ * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO
+ * ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
+ * CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS
+ * SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES THEREOF, EVEN
+ * IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, AND NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON
+ * AN "AS IS" BASIS, AND THE AUTHORS AND DISTRIBUTORS HAVE NO
+ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
+ * ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * GOVERNMENT USE: If you are acquiring this software on behalf
+ * of the U.S. government, the Government shall have only
+ * "Restricted Rights" in the software and related documentation
+ * as defined in the Federal Acquisition Regulations (FARs) in
+ * Clause 52.227.19 (c) (2). If you are acquiring the software
+ * on behalf of the Department of Defense, the software shall be
+ * classified as "Commercial Computer Software" and the
+ * Government shall have only "Restricted Rights" as defined in
+ * Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
+ * foregoing, the authors grant the U.S. Government and others
+ * acting in its behalf permission to use and distribute the
+ * software in accordance with the terms specified in this
+ * license
+ */
+
+/* Tcl header excerpts */
+#define TCL_OK 0
+#define TCL_ERROR 1
+
+typedef struct Tcl_Interp
+{
+    char *result;
+    void (*freeProc) (char *);
+    int errorLine;
+} Tcl_Interp;
+
+typedef struct Tcl_Command_ *Tcl_Command;
+typedef void *ClientData;
+
+typedef int (Tcl_CmdProc) (ClientData clientData, Tcl_Interp
+        *interp, int argc, const char *argv[]);
+typedef void (Tcl_CmdDeleteProc) (ClientData clientData);
+
+/* Tk header excerpts */
+typedef struct Tk_Window_ *Tk_Window;
+
+typedef void *Tk_PhotoHandle;
+
+typedef struct Tk_PhotoImageBlock
+{
+    unsigned char *pixelPtr;
+    int width;
+    int height;
+    int pitch;
+    int pixelSize;
+    int offset[4];
+} Tk_PhotoImageBlock;