On Wed, 10 Mar 2021 11:40:42 +0800 Bin Meng bmeng.cn@gmail.com wrote:
On Sun, Mar 7, 2021 at 12:26 PM Marek Behún marek.behun@nic.cz wrote:
When building with LTO, using -ffunction-sections/-fdata-sections is not useful anymore.
Signed-off-by: Marek Behún marek.behun@nic.cz
arch/arm/config.mk | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
I believe we should also remove --gc-sections.
It seems that --gc-sections cannot be removed, otherwise some builds, for example turris_mox_defconfig, fail with
LTO u-boot /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(lse-init.o): in function `init_have_lse_atomics': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/config/aarch64/lse-init.c:44: undefined reference to `__getauxval' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_absvsi2.o): in function `__absvdi2': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:228: undefined reference to `abort' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_absvsi2.o): in function `__absvsi2': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:246: undefined reference to `abort' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_absvdi2.o): in function `__absvti2': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:267: undefined reference to `abort' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_addvsi3.o): in function `__addvdi3': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:81: undefined reference to `abort' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_addvsi3.o): in function `__addvsi3': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:92: undefined reference to `abort' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_addvdi3.o):/var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:106: more undefined references to `abort' follow /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_eprintf.o): in function `__eprintf': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:2152: undefined reference to `stderr' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:2152: undefined reference to `stderr' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_eprintf.o): in function `fprintf': /usr/aarch64-unknown-linux-gnu/sys-include/bits/stdio2.h:103: undefined reference to `__fprintf_chk' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /usr/lib/gcc/aarch64-unknown-linux-gnu/10.2.0/libgcc.a(_eprintf.o): in function `__eprintf': /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:2153: undefined reference to `fflush' /usr/libexec/gcc/aarch64-unknown-linux-gnu/ld: /var/tmp/portage/cross-aarch64-unknown-linux-gnu/gcc-10.2.0-r5/work/gcc-10.2.0/libgcc/libgcc2.c:2154: undefined reference to `abort'