https://gcc.gnu.org/g:8e6cc1e7cdbb431a0950e491ed2830213f3ad81b
commit r15-4707-g8e6cc1e7cdbb431a0950e491ed2830213f3ad81b
Author: Fangrui Song <mask...@gcc.gnu.org>
Date: Sun Oct 27 12:37:21 2024 -0700
arm: Support -mfdpic for more targets
Targets that are not arm*-*-uclinuxfdpiceabi can use -S -mfdpic, but -c
-mfdpic does not pass --fdpic to gas. This is an unnecessary
restriction. Just define the ASM_SPEC in bpabi.h.
Additionally, use armelf[b]_linux_fdpiceabi emulations for -mfdpic in
linux-eabi.h. This will allow a future musl fdpic port to use the
desired BFD emulation.
gcc/ChangeLog:
* config/arm/bpabi.h (TARGET_FDPIC_ASM_SPEC): Transform -mfdpic.
* config/arm/linux-eabi.h (TARGET_FDPIC_LINKER_EMULATION): Define.
(SUBTARGET_EXTRA_LINK_SPEC): Use TARGET_FDPIC_LINKER_EMULATION
if -mfdpic.
Diff:
---
gcc/config/arm/bpabi.h | 2 +-
gcc/config/arm/linux-eabi.h | 5 ++++-
2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index 2e418fa91350..fd4b65a28afe 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -55,7 +55,7 @@
#define TARGET_FIX_V4BX_SPEC " %{mcpu=arm8|mcpu=arm810|mcpu=strongarm*"\
"|march=armv4|mcpu=fa526|mcpu=fa626:--fix-v4bx}"
-#define TARGET_FDPIC_ASM_SPEC ""
+#define TARGET_FDPIC_ASM_SPEC "%{mfdpic: --fdpic}"
#define BE8_LINK_SPEC \
"%{!r:%{!mbe32:%:be8_linkopt(%{mlittle-endian:little}" \
diff --git a/gcc/config/arm/linux-eabi.h b/gcc/config/arm/linux-eabi.h
index 50b753df9bcd..b12e4ff82cc3 100644
--- a/gcc/config/arm/linux-eabi.h
+++ b/gcc/config/arm/linux-eabi.h
@@ -46,12 +46,15 @@
#undef TARGET_LINKER_EMULATION
#if TARGET_BIG_ENDIAN_DEFAULT
#define TARGET_LINKER_EMULATION "armelfb_linux_eabi"
+#define TARGET_FDPIC_LINKER_EMULATION "armelfb_linux_fdpiceabi"
#else
#define TARGET_LINKER_EMULATION "armelf_linux_eabi"
+#define TARGET_FDPIC_LINKER_EMULATION "armelf_linux_fdpiceabi"
#endif
#undef SUBTARGET_EXTRA_LINK_SPEC
-#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION
+#define SUBTARGET_EXTRA_LINK_SPEC " -m %{mfdpic: " \
+ TARGET_FDPIC_LINKER_EMULATION ";:" TARGET_LINKER_EMULATION "}"
/* GNU/Linux on ARM currently supports three dynamic linkers:
- ld-linux.so.2 - for the legacy ABI
