cppinit.c (builtin_array): Update.
* cppinit.c (builtin_array): Update. (init_builtins): Flag builtins to warn if redefined or undefined. Define __GXX_WEAK as a normal macro. * cpplib.c (do_undef): Warn if flagged NODE_WARN. * cpplib.h (NODE_WARN): New flag. * cppmacro.c (builtin_macro): Remove handling of __GXX_WEAK__. Handle __STDC__ as a builtin only on Solaris. (warn_of_redefinition): Renamed from check_macro_definition. Reverse sense of test. Always warn if NODE_WARN. (_cpp_create_definition): Use warn_of_redefinition. Flag any macro beginning with "__STDC_" to require a mandatory warning if redefined or undefined. From-SVN: r40053
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