+ --enable-stdnoreturn
+ When enabled, check if the <stdnoreturn.h> header exists, and if found
+ define GCC_NORETURN to _Noreturn rather than either the gcc-specific
+ __attribute__((noreturn)) or an empty token. Doing this may require
+ calling programs which use GCC_NORETURN in their own function
+ definitions to be modified, because _Noreturn is only accepted as
+ the first token in a declaration.
+