https://gcc.gnu.org/g:3a7e796b48b9d8e37ec142abd9c20b1847535f7e
commit r14-10471-g3a7e796b48b9d8e37ec142abd9c20b1847535f7e
Author: Fangrui Song <mask...@gcc.gnu.org>
Date: Fri Apr 26 18:14:33 2024 -0700
RISC-V: Add -X to link spec
--discard-locals (-X) instructs the linker to remove local .L* symbols,
which occur a lot due to label differences for linker relaxation. The
arm port has a similar need and passes -X to ld.
In contrast, the RISC-V port does not pass -X to ld and rely on the
default --discard-locals in GNU ld's riscv port. The arm way is more
conventional (compiler driver instead of the linker customizes the
default linker behavior) and works with lld.
gcc/ChangeLog:
* config/riscv/elf.h (LINK_SPEC): Add -X.
* config/riscv/freebsd.h (LINK_SPEC): Add -X.
* config/riscv/linux.h (LINK_SPEC): Add -X.
(cherry picked from commit 50c218e3ffe57860591a987ecf44fcc0abb31f2c)
Diff:
---
gcc/config/riscv/elf.h | 1 +
gcc/config/riscv/freebsd.h | 1 +
gcc/config/riscv/linux.h | 1 +
3 files changed, 3 insertions(+)
diff --git a/gcc/config/riscv/elf.h b/gcc/config/riscv/elf.h
index f533764d9f86..c97f13c0ccad 100644
--- a/gcc/config/riscv/elf.h
+++ b/gcc/config/riscv/elf.h
@@ -20,6 +20,7 @@ along with GCC; see the file COPYING3. If not see
#define LINK_SPEC "\
-melf" XLEN_SPEC DEFAULT_ENDIAN_SPEC "riscv \
%{mno-relax:--no-relax} \
+-X \
%{mbig-endian:-EB} \
%{mlittle-endian:-EL} \
%{shared}"
diff --git a/gcc/config/riscv/freebsd.h b/gcc/config/riscv/freebsd.h
index bd08a9852850..5dd4d51c42bc 100644
--- a/gcc/config/riscv/freebsd.h
+++ b/gcc/config/riscv/freebsd.h
@@ -44,6 +44,7 @@ along with GCC; see the file COPYING3. If not see
%{p:%nconsider using `-pg' instead of `-p' with gprof (1)} \
%{v:-V} \
%{assert*} %{R*} %{rpath*} %{defsym*} \
+ -X \
%{mbig-endian:-EB} \
%{mlittle-endian:-EL} \
%{shared:-Bshareable %{h*} %{soname*}} \
diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h
index 15851f653bc6..3c356227134d 100644
--- a/gcc/config/riscv/linux.h
+++ b/gcc/config/riscv/linux.h
@@ -50,6 +50,7 @@ along with GCC; see the file COPYING3. If not see
#define LINK_SPEC "\
-melf" XLEN_SPEC DEFAULT_ENDIAN_SPEC "riscv" LD_EMUL_SUFFIX " \
%{mno-relax:--no-relax} \
+-X \
%{mbig-endian:-EB} \
%{mlittle-endian:-EL} \
%{shared} \
