COMP: Mangle znzlib symbols, as niftilib already is

Modules/ThirdParty/NIFTI/src/nifti/znzlib/itk_znzlib_mangle.h

@@ -0,0 +1,32 @@
+#ifndef itk_znzlib_mangle_h
+#define itk_znzlib_mangle_h
+
+/*
+This header file mangles all symbols exported from the znzlib library.
+It is intended to be included by ITK's version "znzlib.h".
+
+It is the counterpart of itk_nifti_mangle.h: without it ITKznz exports the
+plain znzlib names, which collide with any other znzlib in the same process
+(e.g. a system nifti_clib pulled in by another library).
+
+Note: znzclose() is a macro over Xznzclose(), so only Xznzclose is mangled;
+the macro expands to the mangled name at the call site.
+*/
+
+#define Xznzclose itk_Xznzclose
+#define znzdopen itk_znzdopen
+#define znzeof itk_znzeof
+#define znzflush itk_znzflush
+#define znzgetc itk_znzgetc
+#define znzgets itk_znzgets
+#define znzopen itk_znzopen
+#define znzprintf itk_znzprintf
+#define znzputc itk_znzputc
+#define znzputs itk_znzputs
+#define znzread itk_znzread
+#define znzrewind itk_znzrewind
+#define znzseek itk_znzseek
+#define znztell itk_znztell
+#define znzwrite itk_znzwrite
+
+#endif

Modules/ThirdParty/NIFTI/src/nifti/znzlib/znzlib.h

@@ -36,6 +36,9 @@ NB: seeks for writable files with compression are quite restricted
 */
 
 
+// Name mangling, specific to the version of znzlib included with ITK.
+#include "itk_znzlib_mangle.h"
+
 /*=================*/
 #ifdef  __cplusplus
 extern "C" {