(CPP_SPEC): Always define __LANGUAGE_C__ unless assembler.

(CPP_SPEC): Always define __LANGUAGE_C__ unless assembler.  Define
__cplusplus for C++.

From-SVN: r6084

gcc/config/alpha/alpha.h

@@ -25,14 +25,14 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 -Dunix -D__osf__ -D__alpha -D__alpha__ -D_LONGLONG -DSYSTYPE_BSD  \
 -D_SYSTYPE_BSD -Asystem(unix) -Asystem(xpg4) -Acpu(alpha) -Amachine(alpha)"
 
-/* Write out the correct language type definition for the header files.  */
+/* Write out the correct language type definition for the header files.  
+   Unless we have assembler language, write out the symbols for C.  */
 #define CPP_SPEC "\
-%{.c:	-D__LANGUAGE_C__  -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
-%{.h:	-D__LANGUAGE_C__  -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
+%{!.S:	-D__LANGUAGE_C__ -D__LANGUAGE_C %{!ansi:-DLANGUAGE_C}}  \
 %{.S:	-D__LANGUAGE_ASSEMBLY__ -D__LANGUAGE_ASSEMBLY %{!ansi:-DLANGUAGE_ASSEMBLY}} \
-%{.cc:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
-%{.cxx:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
-%{.C:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS} \
+%{.cc:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
+%{.cxx:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
+%{.C:	-D__LANGUAGE_C_PLUS_PLUS__ -D__LANGUAGE_C_PLUS_PLUS -D__cplusplus} \
 %{.m:	-D__LANGUAGE_OBJECTIVE_C__ -D__LANGUAGE_OBJECTIVE_C}"
 
 /* Set the spec to use for signed char.  The default tests the above macro