https://gcc.gnu.org/g:70be268cd45fd836f3606afc66d5c83f9c4b5e74
commit r15-10486-g70be268cd45fd836f3606afc66d5c83f9c4b5e74 Author: Georg-Johann Lay <[email protected]> Date: Thu Nov 6 20:20:49 2025 +0100 AVR: target/122516: Make attribute "retain" work. Due to some quirks in crtstuff.c, attribute "retain" requires some features that avr doesn't implement -- even though it doesnt't even use crtstuff. This patch works around that. PR target/122516 gcc/ * config/avr/elf.h (SUPPORTS_SHF_GNU_RETAIN): Define if HAVE_GAS_SHF_GNU_RETAIN. (cherry picked from commit d5ede6fff1ff19738d60350856ab852522809068) Diff: --- gcc/config/avr/elf.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/gcc/config/avr/elf.h b/gcc/config/avr/elf.h index d240f8549d79..e0f8a8770ba3 100644 --- a/gcc/config/avr/elf.h +++ b/gcc/config/avr/elf.h @@ -18,6 +18,19 @@ along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ +/* defaults.h requires HAVE_INITFINI_ARRAY_SUPPORT to be present + in order for attribute "retain" to be recognized. This is due + to some quirks in crtstuff.h -- which isn't even used by avr. + All we need is that Binutils supports the "R"etain section flag. + If that's the case, define SUPPORTS_SHF_GNU_RETAIN so that + defaults.h doesn't define it to 0. */ +#if defined(IN_GCC) && !defined(USED_FOR_TARGET) && !defined(GENERATOR_FILE) +#include "auto-host.h" /* HAVE_GAS_SHF_GNU_RETAIN */ +#if HAVE_GAS_SHF_GNU_RETAIN +#undef SUPPORTS_SHF_GNU_RETAIN +#define SUPPORTS_SHF_GNU_RETAIN 1 +#endif +#endif /* Overriding some definitions from elfos.h for AVR. */
