+ _Noreturn: Ignore __STDC_VERSION__; observe _MSC_VER.
+ * build-aux/_Noreturn.h (_Noreturn): Ignore __STDC_VERSION__.
+ Reparenthesize to avoid GCC warning.
+ Support Microsoft's syntax.
+ * m4/gnulib-common.m4 (gl_COMMON_BODY): Likewise.
+
+ _Noreturn-tests: remove module
+ * modules/_Noreturn-tests: Remove.
+ * modules/stdnoreturn-tests (Files): Remove tests/test-_Noreturn.c.
+ * tests/test-_Noreturn.c: Remove.
+ * tests/test-stdnoreturn.c: Merge from the old
+ tests/test-_Noreturn.c, testing both noreturn and _Noreturn.
+