* lang-options.h, decl2.c: Add -fno-enforce-eh-specs.
        * cp-tree.h: Declare flag_enforce_eh_specs.
        * decl.c (store_parm_decls, finish_function): Check it.

        C library functions don't throw.
        * Makefile.in (cfns.h): New target.
        (except.o): Depend on it.
        * Make-lang.in (cc1plus): Depend on cfns.gperf.
        * cfns.gperf: New file.
        * cfns.h: Generated.
        * except.c: Include it.
        (nothrow_libfn_p): New fn.
        * decl.c (grokfndecl): Use it.
        * cp-tree.h: Declare it.

From-SVN: r32469