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Merge changes from topic "hm/make-refactor" into integration
* changes: docs(prerequisites): use LLVM utilities to build with clang build(make): use clang binutils to compile
This commit is contained in:
Manish Pandey
TrustedFirmware Code Review
commit
b7bd9863dc
3 changed files with 33 additions and 33 deletions
36
Makefile
36
Makefile
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@ -263,24 +263,24 @@ ENABLE_FEAT_RNG = $(if $(findstring rng,${arch-features}),1,0)
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# Determine if FEAT_SB is supported
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ENABLE_FEAT_SB = $(if $(findstring sb,${arch-features}),1,0)
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ifneq ($(findstring armclang,$(notdir $(CC))),)
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TF_CFLAGS_aarch32 = -target arm-arm-none-eabi $(march32-directive)
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TF_CFLAGS_aarch64 = -target aarch64-arm-none-eabi $(march64-directive)
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LD = $(LINKER)
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AS = $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
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CPP = $(CC) -E $(TF_CFLAGS_$(ARCH))
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PP = $(CC) -E $(TF_CFLAGS_$(ARCH))
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else ifneq ($(findstring clang,$(notdir $(CC))),)
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CLANG_CCDIR = $(if $(filter-out ./,$(dir $(CC))),$(dir $(CC)),)
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TF_CFLAGS_aarch32 = $(target32-directive) $(march32-directive)
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TF_CFLAGS_aarch64 = -target aarch64-elf $(march64-directive)
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LD = $(CLANG_CCDIR)ld.lld
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ifeq (, $(shell which $(LD)))
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$(error "No $(LD) in PATH, make sure it is installed or set LD to a different linker")
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endif
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AS = $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
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CPP = $(CC) -E
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PP = $(CC) -E
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ifneq ($(findstring clang,$(notdir $(CC))),)
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ifneq ($(findstring armclang,$(notdir $(CC))),)
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TF_CFLAGS_aarch32 := -target arm-arm-none-eabi $(march32-directive)
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TF_CFLAGS_aarch64 := -target aarch64-arm-none-eabi $(march64-directive)
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LD := $(LINKER)
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else
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TF_CFLAGS_aarch32 := $(target32-directive) $(march32-directive)
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TF_CFLAGS_aarch64 := -target aarch64-elf $(march64-directive)
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LD := $(shell $(CC) --print-prog-name ld.lld)
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AR := $(shell $(CC) --print-prog-name llvm-ar)
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OD := $(shell $(CC) --print-prog-name llvm-objdump)
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OC := $(shell $(CC) --print-prog-name llvm-objcopy)
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endif
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CPP := $(CC) -E $(TF_CFLAGS_$(ARCH))
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PP := $(CC) -E $(TF_CFLAGS_$(ARCH))
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AS := $(CC) -c -x assembler-with-cpp $(TF_CFLAGS_$(ARCH))
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else ifneq ($(findstring gcc,$(notdir $(CC))),)
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TF_CFLAGS_aarch32 = $(march32-directive)
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TF_CFLAGS_aarch64 = $(march64-directive)
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@ -18,16 +18,12 @@ Performing an Initial Build
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It is possible to build TF-A using Clang or Arm Compiler 6. To do so
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``CC`` needs to point to the clang or armclang binary, which will
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also select the clang or armclang assembler. Be aware that for Arm Compiler,
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the GNU linker is used by default. However for Clang LLVM linker (LLD)
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is used by default. In case of being needed the linker can be overridden
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using the ``LD`` variable. LLVM linker (LLD) version 9 is
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known to work with TF-A.
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In both cases ``CROSS_COMPILE`` should be set as described above.
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Arm Compiler 6 will be selected when the base name of the path assigned
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to ``CC`` matches the string 'armclang'.
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also select the clang or armclang assembler. Arm Compiler 6 will be selected
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when the base name of the path assigned to ``CC`` matches the string
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'armclang'. GNU binutils are required since the TF-A build system doesn't
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currently support Arm Scatter files. Meaning the GNU linker is used by
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default for Arm Compiler 6. Because of this dependency, ``CROSS_COMPILE``
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should be set as described above.
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For AArch64 using Arm Compiler 6:
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@ -36,6 +32,11 @@ Performing an Initial Build
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export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-none-elf-
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make CC=<path-to-armclang>/bin/armclang PLAT=<platform> all
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On the other hand, Clang uses LLVM linker (LLD) and other LLVM binutils by
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default instead of GNU utilities (LLVM linker (LLD) 14.0.0 is known to
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work with TF-A). ``CROSS_COMPILE`` need not be set for Clang. Please note,
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that the default linker may be manually overridden using the ``LD`` variable.
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Clang will be selected when the base name of the path assigned to ``CC``
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contains the string 'clang'. This is to allow both clang and clang-X.Y
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to work.
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@ -44,7 +45,6 @@ Performing an Initial Build
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.. code:: shell
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export CROSS_COMPILE=<path-to-aarch64-gcc>/bin/aarch64-none-elf-
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make CC=<path-to-clang>/bin/clang PLAT=<platform> all
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- Change to the root directory of the TF-A source tree and build.
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@ -115,4 +115,4 @@ Performing an Initial Build
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--------------
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*Copyright (c) 2020, Arm Limited. All rights reserved.*
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*Copyright (c) 2020-2022, Arm Limited. All rights reserved.*
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@ -27,8 +27,8 @@ Toolchain
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target the Armv7-A or Armv8-A architectures:
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- GCC >= 11.2-2022.02 (from the `Arm Developer website`_)
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- Clang >= 4.0
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- Arm Compiler >= 6.0
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- Clang >= 14.0.0
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- Arm Compiler >= 6.18
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In addition, a native compiler is required to build the supporting tools.
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@ -160,7 +160,7 @@ documentation, available `here <https://git-scm.com/docs/githooks>`_.
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--------------
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*Copyright (c) 2021, Arm Limited. All rights reserved.*
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*Copyright (c) 2021-2022, Arm Limited. All rights reserved.*
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.. _Arm Developer website: https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/downloads
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.. _Gerrit Code Review: https://www.gerritcodereview.com/
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