Cercando un po' in google ho trovato questa linea di codice da aggiungere alle opzioni di configure:

codice:
--with-macosx-sdk=/Developer/SDKs/MacOSX10.6.sdk --with-macosx-version-min=10.6
L'ho utilizzata tale e quale (anche se io sono su 10.7), perché cambiando in 10.7 la versione non cambiava niente. Così l'errore é scomparso ma ne ottengo un'altro...

codice:
../src/common/intl.cpp: In static member function ‘static int wxLocale::GetSystemLanguage()’:
../src/common/intl.cpp:2060: error: ‘smScriptLang’ was not declared in this scope
../src/common/intl.cpp:2060: error: ‘GetScriptVariable’ was not declared in this scope
../src/common/intl.cpp:2061: warning: ‘GetScriptManagerVariable’ is deprecated (declared at /Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Script.h:993)
../src/common/intl.cpp:2061: warning: ‘GetScriptManagerVariable’ is deprecated (declared at /Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Frameworks/CarbonCore.framework/Headers/Script.h:993)
make: *** [basedll_intl.o] Error 1