build: allow multiple toolchain defaults
This change enables a fairly commonly-requested use-case, which is to
fall back to the host system's native toolchain when building on AArch64
if the bare-metal toolchain is not available.
In this situation, if the `aarch64-none-elf` GCC toolchain cannot be
located, the build system will look for `aarch64-linux-gnu` before
giving up.
Change-Id: I39d2a8837b651b28cf0eafa92f6003a7f66767a0
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/make_helpers/toolchains/aarch64.mk b/make_helpers/toolchains/aarch64.mk
index afefe3e..476fbf3 100644
--- a/make_helpers/toolchains/aarch64.mk
+++ b/make_helpers/toolchains/aarch64.mk
@@ -7,33 +7,40 @@
aarch64-name := AArch64
aarch64-cc-parameter := CC
+aarch64-cc-default-id := gnu-gcc
aarch64-cc-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
-aarch64-cc-id-default := gnu-gcc
+aarch64-cc-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-gcc)
aarch64-cpp-parameter := CPP
+aarch64-cpp-default-id := gnu-gcc
aarch64-cpp-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
-aarch64-cpp-id-default := gnu-gcc
+aarch64-cpp-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-gcc)
aarch64-as-parameter := AS
+aarch64-as-default-id := gnu-gcc
aarch64-as-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
-aarch64-as-id-default := gnu-gcc
+aarch64-as-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-gcc)
aarch64-ld-parameter := LD
+aarch64-ld-default-id := gnu-gcc
aarch64-ld-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc
-aarch64-ld-id-default := gnu-gcc
+aarch64-ld-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-gcc)
aarch64-oc-parameter := OC
+aarch64-oc-default-id := gnu-objcopy
aarch64-oc-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)objcopy
-aarch64-oc-id-default := gnu-objcopy
+aarch64-oc-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-objcopy)
aarch64-od-parameter := OD
+aarch64-od-default-id := gnu-objdump
aarch64-od-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)objdump
-aarch64-od-id-default := gnu-objdump
+aarch64-od-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-objdump)
aarch64-ar-parameter := AR
+aarch64-ar-default-id := gnu-ar
aarch64-ar-default := $(or $(CROSS_COMPILE),aarch64-none-elf-)gcc-ar
-aarch64-ar-id-default := gnu-ar
+aarch64-ar-default += $(if $(CROSS_COMPILE),,aarch64-linux-gnu-gcc-ar)
aarch64-dtc-parameter := DTC
+aarch64-dtc-default-id := generic-dtc
aarch64-dtc-default := dtc
-aarch64-dtc-id-default := generic-dtc