cpp: Restrict C++ exceptions usage to supported archs

This commit makes CONFIG_EXCEPTIONS un-selectable for the architectures
that are known to have broken C++ exception handling support
(see #32448).

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

subsys/cpp/Kconfig

@@ -54,6 +54,7 @@ if LIB_CPLUSPLUS
 
 config EXCEPTIONS
 	bool "Enable C++ exceptions support"
+	depends on !NIOS2 && !SPARC
 	help
 	  This option enables support of C++ exceptions.