LTO: pick up -fcf-protection flag for the link step
2020-07-14 Matthias Klose <doko@ubuntu.com>
PR lto/95604
* lto-wrapper.c (merge_and_complain): Add decoded options as parameter,
error on different values for -fcf-protection.
(append_compiler_options): Pass -fcf-protection option.
(find_and_merge_options): Add decoded options as parameter,
pass decoded_options to merge_and_complain.
(run_gcc): Pass decoded options to find_and_merge_options.
* lto-opts.c (lto_write_options): Pass -fcf-protection option.