Compilation errors for MaxObject.m and MacOSX10.6 SDK #25

Hello,
I need to create a Max external to communicate with the Wacom tablet driver, which is written in Objective-C.
Unfortunately, I cannot compile the file MaxObject.m with the recommended platform (MacOSX10.6 SDK).
It seems that some Objective-C symbols of the SDK file runtime.h are marked UNAVAILABLE or deprecated.
I use clang and makefile, but the errors are identical when I load the Xcode project that you provide.
Does it exist a mean to fix this and produce the MaxObject framework ?
Below is my stack trace.
Thanks for your help.
jocelyn

==== Compile objectivemax file : source/core/ObjectiveMax/MaxAudioSignal.m ====
clang -arch x86_64 -isysroot 3rdparty/MacOSX10.6.sdk -mmacosx-version-min=10.6 -ObjC -Wall -Wno-unknown-pragmas -Werror -g -O3 -DDENORM_WANT_FIX=1 -DNO_TRANSLATION_SUPPORT=1 -DC74_NO_DEPRECATION
-DMAC_VERSION -DMAC_EXT_VERSION -Dpowerc -fvisibility=hidden
-I3rdparty/Max8.sdk/max-includes -I3rdparty/Max8.sdk/msp-includes -I3rdparty/Max8.sdk/jit-includes
-F3rdparty/Max8.sdk/max-includes -F3rdparty/Max8.sdk/msp-includes -F3rdparty/Max8.sdk/jit-includes
-include 3rdparty/Max8.sdk/max-includes/macho-prefix.pch -c source/core/ObjectiveMax/MaxAudioSignal.m -o source/core/ObjectiveMax/MaxAudioSignal.o
==== Compile objectivemax file : source/core/ObjectiveMax/MaxObject.m ====
clang -arch x86_64 -isysroot 3rdparty/MacOSX10.6.sdk -mmacosx-version-min=10.6 -ObjC -Wall -Wno-unknown-pragmas -Werror -g -O3 -DDENORM_WANT_FIX=1 -DNO_TRANSLATION_SUPPORT=1 -DC74_NO_DEPRECATION
-DMAC_VERSION -DMAC_EXT_VERSION -Dpowerc -fvisibility=hidden
-I3rdparty/Max8.sdk/max-includes -I3rdparty/Max8.sdk/msp-includes -I3rdparty/Max8.sdk/jit-includes
-F3rdparty/Max8.sdk/max-includes -F3rdparty/Max8.sdk/msp-includes -F3rdparty/Max8.sdk/jit-includes
-include 3rdparty/Max8.sdk/max-includes/macho-prefix.pch -c source/core/ObjectiveMax/MaxObject.m -o source/core/ObjectiveMax/MaxObject.o
source/core/ObjectiveMax/MaxObject.m:54:42: error: 'class_nextMethodList' is unavailable
struct objc_method_list *methodlist = class_nextMethodList(aClass, &iterator);
^
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:493:38: note: 'class_nextMethodList' has been explicitly marked unavailable here
OBJC_EXPORT struct objc_method_list *class_nextMethodList(Class, void **) OBJC2_UNAVAILABLE;
^
source/core/ObjectiveMax/MaxObject.m:55:45: error: no member named 'ivars' in 'struct objc_class'
struct objc_ivar_list *varlist = aClass->ivars;
~~~~~~ ^
source/core/ObjectiveMax/MaxObject.m:59:27: error: incomplete definition of type 'struct objc_method_list'
for(i=0; i < methodlist->method_count; i++){
~~~~~~~~~~^
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:460:8: note: forward declaration of 'struct objc_method_list'
struct objc_method_list;
^
source/core/ObjectiveMax/MaxObject.m:63:49: error: incomplete definition of type 'struct objc_method_list'
strncpy(methodname, (const char *)methodlist->method_list[i].method_name, 255);
~~~~~~~~~~^
3rdparty/MacOSX10.6.sdk/usr/include/secure/_string.h:109:37: note: expanded from macro 'strncpy'
? __builtin___strncpy_chk (dest, src, len, __darwin_obsz (dest))
^~~
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:460:8: note: forward declaration of 'struct objc_method_list'
struct objc_method_list;
^
source/core/ObjectiveMax/MaxObject.m:63:49: error: incomplete definition of type 'struct objc_method_list'
strncpy(methodname, (const char *)methodlist->method_list[i].method_name, 255);
~~~~~~~~~~^
3rdparty/MacOSX10.6.sdk/usr/include/secure/_string.h:110:34: note: expanded from macro 'strncpy'
: __inline_strncpy_chk (dest, src, len))
^~~
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:460:8: note: forward declaration of 'struct objc_method_list'
struct objc_method_list;
^
source/core/ObjectiveMax/MaxObject.m:122:17: error: 'class_nextMethodList' is unavailable
methodlist = class_nextMethodList(aClass, &iterator);
^
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:493:38: note: 'class_nextMethodList' has been explicitly marked unavailable here
OBJC_EXPORT struct objc_method_list *class_nextMethodList(Class, void **) OBJC2_UNAVAILABLE;
^
source/core/ObjectiveMax/MaxObject.m:126:24: error: incomplete definition of type 'struct objc_ivar_list'
for(i=0; i < varlist->ivar_count; i++){
~~~~~~~^
source/core/ObjectiveMax/MaxObject.m:55:10: note: forward declaration of 'struct objc_ivar_list'
struct objc_ivar_list *varlist = aClass->ivars;
^
source/core/ObjectiveMax/MaxObject.m:127:35: error: incomplete definition of type 'struct objc_ivar_list'
struct objc_ivar var = varlist->ivar_list[i];
~~~~~~~^
source/core/ObjectiveMax/MaxObject.m:55:10: note: forward declaration of 'struct objc_ivar_list'
struct objc_ivar_list *varlist = aClass->ivars;
^
source/core/ObjectiveMax/MaxObject.m:127:22: error: variable has incomplete type 'struct objc_ivar'
struct objc_ivar var = varlist->ivar_list[i];
^
3rdparty/MacOSX10.6.sdk/usr/include/objc/runtime.h:42:16: note: forward declaration of 'struct objc_ivar'
typedef struct objc_ivar *Ivar;
^
source/core/ObjectiveMax/MaxObject.m:211:20: error: no member named 'super_class' in 'struct objc_class'
aClass = aClass->super_class;
~~~~~~ ^
source/core/ObjectiveMax/MaxObject.m:496:41: error: 'cString' is deprecated [-Werror,-Wdeprecated-declarations]
object_setInstanceVariable(self, [key cString], (void *)value);
^
3rdparty/MacOSX10.6.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:367:25: note: 'cString' has been explicitly
marked deprecated here

• (const char *)cString DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER;
  ^
  3rdparty/MacOSX10.6.sdk/usr/include/AvailabilityMacros.h:477:62: note: expanded from macro 'DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER'
  #define DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER DEPRECATED_ATTRIBUTE
  ^
  3rdparty/MacOSX10.6.sdk/usr/include/AvailabilityMacros.h:160:49: note: expanded from macro 'DEPRECATED_ATTRIBUTE'
  #define DEPRECATED_ATTRIBUTE attribute((deprecated))
  ^
  source/core/ObjectiveMax/MaxObject.m:512:41: error: 'cString' is deprecated [-Werror,-Wdeprecated-declarations]
  object_getInstanceVariable(self, [key cString], (void **)&value);
  ^
  3rdparty/MacOSX10.6.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSString.h:367:25: note: 'cString' has been explicitly
  marked deprecated here
• (const char *)cString DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER;
  ^
  3rdparty/MacOSX10.6.sdk/usr/include/AvailabilityMacros.h:477:62: note: expanded from macro 'DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER'
  #define DEPRECATED_IN_MAC_OS_X_VERSION_10_4_AND_LATER DEPRECATED_ATTRIBUTE
  ^
  3rdparty/MacOSX10.6.sdk/usr/include/AvailabilityMacros.h:160:49: note: expanded from macro 'DEPRECATED_ATTRIBUTE'
  #define DEPRECATED_ATTRIBUTE attribute((deprecated))
  ^
  12 errors generated.
  make: *** [source/core/ObjectiveMax/MaxObject.o] Error 1-