On Tue, Nov 3, 2020 at 9:41 AM Jozef Lawrynowicz <joze...@mittosystems.com> wrote: > > The attached patch implements TARGET_ASM_MARK_DECL_PRESERVED for ELF GNU > OSABI targets, so that declarations that have the "used" attribute > applied will be saved from linker garbage collection. > > TARGET_ASM_MARK_DECL_PRESERVED will emit an assembler ".retain"
Can you use the "R" flag instead? > directive for the decl, and the assembler will apply the SHF_GNU_RETAIN > flag to the section containing the decl. > The linker will not garbage collect sections marked with the > SHF_GNU_RETAIN flag. > > SHF_GNU_RETAIN is a GNU OSABI ELF extension, and it was discussed on the > GNU gABI mailing list here: > https://sourceware.org/pipermail/gnu-gabi/2020q3/000429.html > > The Binutils patch to implement .retain and other SHF_GNU_RETAIN > handling is posted here: > https://sourceware.org/pipermail/binutils/2020-November/113993.html > > Successfully bootstrapped and regtested for x86_64-pc-linux-gnu, and > regtested for arm-none-eabi. > > Ok for trunk? > > Thanks, > Jozef -- H.J.
