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* opts.h (cl_option_state): New structure. (get_option_state): Declare. * opts.c (get_option_state): New function. * toplev.c (option_affects_pch_p): New function. (default_get_pch_validity): Store the state of all options for which option_affects_pch_p returns true. (default_pch_valid_p): Check the state of those options here. Only check target_flags separately if targetm.check_pch_target_Flags is nonnull or if TARGET_SWITCHES is defined. From-SVN: r100430
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