mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-16 09:34:18 +00:00
8620bd0b93
The toolchain refactor change introduces the `${toolchain}-${tool}-id`
variables, which provide identifiers for all of the toolchain tools used
by the build system. This change replaces the various conditions that
are in use to identify these tools based on the path with a standard set
of comparisons against these new identifier variables.
Change-Id: Ib60e592359fa6e415c19a012e68d660f87436ca7
Signed-off-by: Chris Kay <chris.kay@arm.com>
94 lines
3.7 KiB
Makefile
94 lines
3.7 KiB
Makefile
#
|
|
# Copyright (c) 2023-2024, Arm Limited. All rights reserved.
|
|
#
|
|
# SPDX-License-Identifier: BSD-3-Clause
|
|
#
|
|
|
|
# This build helper makefile is used to determine a suitable march build
|
|
# option to be used, based on platform provided ARM_ARCH_MAJOR/MINOR
|
|
# data and compiler supported march version.
|
|
|
|
# Set the compiler's target architecture profile based on
|
|
# ARM_ARCH_MAJOR and ARM_ARCH_MINOR options.
|
|
|
|
|
|
# This is used to collect available march values from compiler.
|
|
# Example on a gcc-12.2 arm64 toolchain it will look like:
|
|
# [...]
|
|
#./aarch64-none-elf-gcc --target-help -march=foo
|
|
# cc1: error: unknown value 'foo' for '-march'
|
|
# cc1: note: valid arguments are: armv8-a armv8.1-a armv8.2-a armv8.3-a armv8.4-a armv8.5-a
|
|
# armv8.6-a armv8.7-a armv8.8-a armv8-r armv9-a
|
|
# [...]
|
|
#
|
|
GCC_MARCH_OUTPUT := $(shell $($(ARCH)-cc) -march=foo -Q --help=target -v 2>&1)
|
|
|
|
# This function is used to find the best march value supported by the given compiler.
|
|
# We try to use `GCC_MARCH_OUTPUT` which has verbose message with supported march values we filter that
|
|
# to find armvX.Y-a or armvX-a values, then filter the best supported arch based on ARM_ARCH_MAJOR.
|
|
#
|
|
# Example on a gcc-12.2 arm64 toolchain this will return armv9-a if platform requested for armv9.2-a
|
|
# Similarly on gcc 11.3 it would return armv8.6-a if platform requested armv8.8-a
|
|
define major_best_avail_march
|
|
$(1) := $(lastword $(filter armv$(ARM_ARCH_MAJOR)% ,$(filter armv%-a, $(GCC_MARCH_OUTPUT))))
|
|
endef
|
|
|
|
# This function is used to just return latest march value supported by the given compiler.
|
|
#
|
|
# Example: this would return armv8.6-a on a gcc-11.3 when platform requested for armv9.0-a
|
|
#
|
|
# Thus this function should be used in conjunction with major_best_avail_march, when best match
|
|
# is not found it should be ok to try with lastest known supported march value from the
|
|
# compiler.
|
|
define latest_match_march
|
|
$(1) := $(lastword $(filter armv%-a, $(GCC_MARCH_OUTPUT)))
|
|
endef
|
|
|
|
ifdef MARCH_DIRECTIVE
|
|
march-directive := $(MARCH_DIRECTIVE)
|
|
else
|
|
|
|
ifeq (${ARM_ARCH_MINOR},0)
|
|
provided-march = armv${ARM_ARCH_MAJOR}-a
|
|
else
|
|
provided-march = armv${ARM_ARCH_MAJOR}.${ARM_ARCH_MINOR}-a
|
|
endif
|
|
|
|
ifeq ($(filter %-clang,$($(ARCH)-cc-id)),)
|
|
|
|
# We expect from Platform to provide a correct Major/Minor value but expecting something
|
|
# from compiler with unsupported march means we shouldn't fail without trying anything,
|
|
# so here we try to find best supported march value and use that for compilation.
|
|
# If we don't support current march version from gcc compiler, try with lower arch based on
|
|
# availability. In TF-A there is no hard rule for need of higher version march for basic
|
|
# functionality, denying a build on only this fact doesn't look correct, so try with best
|
|
# or latest march values from whats available from compiler.
|
|
ifeq (,$(findstring $(provided-march), $(GCC_MARCH_OUTPUT)))
|
|
$(eval $(call major_best_avail_march, available-march))
|
|
|
|
ifeq (, $(available-march))
|
|
$(eval $(call latest_match_march, available-march))
|
|
endif
|
|
|
|
# If we fail to come up with any available-march value so far, don't update
|
|
# provided-march and thus allow the build to fail using the provided-march
|
|
# which is derived based on arch_major and arch_minor values.
|
|
ifneq (,$(available-march))
|
|
provided-march := ${available-march}
|
|
endif
|
|
|
|
endif # provided-march supported
|
|
endif # not clang
|
|
|
|
march-directive := -march=${provided-march}
|
|
|
|
# Set the compiler's architecture feature modifiers
|
|
ifneq ($(arch-features), none)
|
|
# Strip "none+" from arch-features
|
|
arch-features := $(subst none+,,$(arch-features))
|
|
march-directive := $(march-directive)+$(arch-features)
|
|
# Print features
|
|
$(info Arm Architecture Features specified: $(subst +, ,$(arch-features)))
|
|
endif #(arch-features)
|
|
|
|
endif # MARCH_DIRECTIVE
|