commit 2f1c5e7eb1775b252fa4998e10093b8ac34ca699
author Chris Kay <chris.kay@arm.com> Wed Feb 21 12:52:46 2024 +0000
committer Chris Kay <chris.kay@arm.com> Tue Apr 02 09:52:17 2024 +0000
tree 0066cdbb20f33c66d1134ead25dc602278c86900
parent 753da8ce4500b1084be41a1d3bb034d47cdf2add

build: use GCC to link by default

When configuring GNU GCC as the C compiler, we usually use the GNU BFD
linker directly to link by default. However, this complicates things
because we also need to support LTO, which can only be done when linking
is done via the C compiler, and we cannot change the linker later on if
some other part of the build system wants to enable LTO.

This change migrates the default choice of linker to GCC if the C
compiler is GCC, in order to enable this use-case. This should have no
impact on anything outside of the build system, as by default GCC merely
acts as a wrapper around BFD.

Change-Id: I40771be2b0571def67bbfde9e877e7629ec8cdaa
Signed-off-by: Chris Kay <chris.kay@arm.com>

make_helpers/toolchains/aarch32.mk

diff --git a/make_helpers/toolchains/aarch32.mk b/make_helpers/toolchains/aarch32.mk
index 226bc75..3475c91 100644
--- a/make_helpers/toolchains/aarch32.mk
+++ b/make_helpers/toolchains/aarch32.mk
@@ -7,7 +7,7 @@
 aarch32-cc-default := $(or $(CROSS_COMPILE),arm-none-eabi-)gcc
 aarch32-cpp-default := $(or $(CROSS_COMPILE),arm-none-eabi-)gcc
 aarch32-as-default := $(or $(CROSS_COMPILE),arm-none-eabi-)gcc
-aarch32-ld-default := $(or $(CROSS_COMPILE),arm-none-eabi-)ld.bfd
+aarch32-ld-default := $(or $(CROSS_COMPILE),arm-none-eabi-)gcc
 aarch32-oc-default := $(or $(CROSS_COMPILE),arm-none-eabi-)objcopy
 aarch32-od-default := $(or $(CROSS_COMPILE),arm-none-eabi-)objdump
 aarch32-ar-default := $(or $(CROSS_COMPILE),arm-none-eabi-)gcc-ar

make_helpers/toolchains/aarch64.mk

diff --git a/make_helpers/toolchains/aarch64.mk b/make_helpers/toolchains/aarch64.mk
index 15c5757..d83d918 100644
--- a/make_helpers/toolchains/aarch64.mk
+++ b/make_helpers/toolchains/aarch64.mk
@@ -7,7 +7,7 @@
 aarch64-cc-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
 aarch64-cpp-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
 aarch64-as-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
-aarch64-ld-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)ld.bfd
+aarch64-ld-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
 aarch64-oc-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)objcopy
 aarch64-od-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)objdump
 aarch64-ar-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc-ar

make_helpers/toolchains/rk3399-m0.mk

diff --git a/make_helpers/toolchains/rk3399-m0.mk b/make_helpers/toolchains/rk3399-m0.mk
index c61b6e8..f57d658 100644
--- a/make_helpers/toolchains/rk3399-m0.mk
+++ b/make_helpers/toolchains/rk3399-m0.mk
@@ -7,7 +7,7 @@
 rk3399-m0-cc-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)gcc
 rk3399-m0-cpp-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)gcc
 rk3399-m0-as-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)gcc
-rk3399-m0-ld-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)ld.bfd
+rk3399-m0-ld-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)gcc
 rk3399-m0-oc-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)objcopy
 rk3399-m0-od-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)objdump
 rk3399-m0-ar-default := $(or $(M0_CROSS_COMPILE),arm-none-eabi-)gcc-ar