Hack around different __cxa_* declarations in different GCC versions

bridges/source/cpp_uno/gcc3_linux_x86-64/share.hxx

@@ -76,7 +76,14 @@ struct __cxa_eh_globals
 
 extern "C" CPPU_CURRENT_NAMESPACE::__cxa_eh_globals *__cxa_get_globals () throw();
 
-// The following are in cxxabi.h since GCC 4.7:
+namespace CPPU_CURRENT_NAMESPACE
+{
+
+// The following are in cxxabi.h since GCC 4.7 (they are wrapped in
+// CPPU_CURRENT_NAMESPACE here as different GCC versions have slightly different
+// declarations for them, e.g., with or without throw() specification, so would
+// complain about redeclarations of these somewhat implicitly declared
+// functions):
 #if __GNUC__ == 4 && __GNUC_MINOR__ <= 6
 extern "C" void *__cxa_allocate_exception(
     std::size_t thrown_size ) throw();
@@ -84,9 +91,6 @@ extern "C" void __cxa_throw (
     void *thrown_exception, void *tinfo, void (*dest) (void *) ) __attribute__((noreturn));
 #endif
 
-namespace CPPU_CURRENT_NAMESPACE
-{
-
 // -----
 
 //==================================================================================================

bridges/source/cpp_uno/mingw_intel/share.hxx

@@ -81,7 +81,14 @@ struct __cxa_eh_globals
 
 extern "C" CPPU_CURRENT_NAMESPACE::__cxa_eh_globals *__cxa_get_globals () throw();
 
-// The following are in cxxabi.h since GCC 4.7:
+namespace CPPU_CURRENT_NAMESPACE
+{
+
+// The following are in cxxabi.h since GCC 4.7 (they are wrapped in
+// CPPU_CURRENT_NAMESPACE here as different GCC versions have slightly different
+// declarations for them, e.g., with or without throw() specification, so would
+// complain about redeclarations of these somewhat implicitly declared
+// functions):
 #if __GNUC__ == 4 && __GNUC_MINOR__ <= 6
 extern "C" void *__cxa_allocate_exception(
     std::size_t thrown_size ) throw();
@@ -89,9 +96,6 @@ extern "C" void __cxa_throw (
     void *thrown_exception, void *tinfo, void (*dest) (void *) ) __attribute__((noreturn));
 #endif
 
-namespace CPPU_CURRENT_NAMESPACE
-{
-
 // -----
 
 //==================================================================================================