Nelson Chu 45116f3420 RISC-V: jal cannot refer to a default visibility symbol for shared object. ... This is the original binutils bugzilla report, https://sourceware.org/bugzilla/show_bug.cgi?id=28509 And this is the first version of the proposed binutils patch, https://sourceware.org/pipermail/binutils/2021-November/118398.html After applying the binutils patch, I get the the unexpected error when building libgcc, /scratch/nelsonc/riscv-gnu-toolchain/riscv-gcc/libgcc/config/riscv/div.S:42: /scratch/nelsonc/build-upstream/rv64gc-linux/build-install/riscv64-unknown-linux-gnu/bin/ld: relocation R_RISCV_JAL against `__udivdi3' which may bind externally can not be used when making a shared object; recompile with -fPIC Therefore, this patch add an extra hidden alias symbol for __udivdi3, and then use HIDDEN_JUMPTARGET to target a non-preemptible symbol instead. The solution is similar to glibc as follows, https://sourceware.org/git/?p=glibc.git;a=commit;h=68389203832ab39dd0dbaabbc4059e7fff51c29b libgcc/ChangeLog: * config/riscv/div.S: Add the hidden alias symbol for __udivdi3, and then use HIDDEN_JUMPTARGET to target it since it is non-preemptible. * config/riscv/riscv-asm.h: Added new macros HIDDEN_JUMPTARGET and HIDDEN_DEF.		2021-12-06 10:55:01 +08:00
..
atomic.c	Update copyright years.	2021-01-04 10:26:59 +01:00
crti.S
crtn.S
div.S	RISC-V: jal cannot refer to a default visibility symbol for shared object.	2021-12-06 10:55:01 +08:00
linux-unwind.h	Update copyright years.	2021-01-04 10:26:59 +01:00
muldi3.S	Update copyright years.	2021-01-04 10:26:59 +01:00
multi3.c	Update copyright years.	2021-01-04 10:26:59 +01:00
riscv-asm.h	RISC-V: jal cannot refer to a default visibility symbol for shared object.	2021-12-06 10:55:01 +08:00
save-restore.S	Update copyright years.	2021-01-04 10:26:59 +01:00
sfp-machine.h	RISC-V: Update soft-fp config for big-endian	2021-03-23 17:31:13 +08:00
t-elf	RISC-V/libgcc: Use `-fasynchronous-unwind-tables' for LIB2_DIVMOD_FUNCS	2020-09-29 01:20:01 +01:00
t-elf32
t-elf64
t-softfp32	RISC-V: Build soft-float divide routines for -mno-fdiv.	2019-11-01 13:35:12 -07:00
t-softfp64