Set target_cpu to "arm" don't work.
```
$ cat out/arm.debug/args.gn
is_component_build = true
is_debug = true
symbol_level = 2
target_cpu = "arm"
v8_target_cpu = "arm"
use_goma = false
v8_enable_backtrace = true
v8_enable_fast_mksnapshot = true
v8_enable_slow_dchecks = true
v8_optimized_debug = false
$ gm arm.debug
# autoninja -C out/arm.debug d8
ninja: Entering directory `out/arm.debug'
[0/1] Regenerating ninja files
ERROR at //build/config/mac/BUILD.gn:26:5: Assertion failed.
assert(false, "unknown current_cpu $current_cpu")
^-----
unknown current_cpu arm
See //build/config/BUILDCONFIG.gn:422:23: which caused the file to be
included.
_linker_configs = [ "//build/config/mac:strip_all" ]
^-----------------------------
FAILED: build.ninja
../../buildtools/mac/gn --root=../.. -q --regeneration gen .
ninja: error: rebuilding 'build.ninja': subcommand failed
Error! - V8 compilation finished with errors.
```
On Friday, August 12, 2022 at 10:16:59 PM UTC+8 Jakob Kummerow wrote:
> Set target_cpu to "arm" (using gn args out/arm.debug).
>
> I guess we've fixed the autodetection only for arm64...
>
> On Fri, Aug 12, 2022 at 3:57 PM Feng Yu <f3n...@gmail.com> wrote:
>
>> The auto generated gn config file:
>>
>> ```
>> $ cat out/arm.debug/args.gn
>> is_component_build = true
>> is_debug = true
>> symbol_level = 2
>> target_cpu = "x86"
>> v8_target_cpu = "arm"
>> use_goma = false
>> v8_enable_backtrace = true
>> v8_enable_fast_mksnapshot = true
>> v8_enable_slow_dchecks = true
>> v8_optimized_debug = false
>> ```
>>
>> On Friday, August 12, 2022 at 9:51:17 PM UTC+8 Feng Yu wrote:
>>
>>> I am migrating tests from cctest/ to unittests/. The assembler test is
>>> arch-specific, I need to run tests for loong, riscv, arm & mips arch. see
>>> https://chromium-review.googlesource.com/c/v8/v8/+/3827132 for my work
>>> in progress.
>>>
>>> On Friday, August 12, 2022 at 9:45:06 PM UTC+8 Feng Yu wrote:
>>>
>>>> I am trying to run arm test `test-assembler-arm.cc`, but I fail to
>>>> build arm.debug in my m1 MacBook.
>>>>
>>>> *My machine info*
>>>>
>>>> ```
>>>> $ uname -a
>>>> Darwin fengs-MacBook-Pro.local 21.5.0 Darwin Kernel Version 21.5.0: Tue
>>>> Apr 26 21:08:37 PDT 2022; root:xnu-8020.121.3~4/RELEASE_ARM64_T6000 x86_64
>>>> ```
>>>>
>>>> *Console output*
>>>>
>>>> ```
>>>> $ gm arm.debug
>>>> # autoninja -C out/arm.debug d8
>>>> ninja: Entering directory `out/arm.debug'
>>>> [1/1467] CXX obj/v8_heap_base/push_registers_asm.o
>>>> FAILED: obj/v8_heap_base/push_registers_asm.o
>>>> ../../third_party/llvm-build/Release+Asserts/bin/clang++ -MMD -MF
>>>> obj/v8_heap_base/push_registers_asm.o.d -D__STDC_CONSTANT_MACROS
>>>> -D__STDC_FORMAT_MACROS -D_LIBCPP_HAS_NO_ALIGNED_ALLOCATION
>>>> -DCR_XCODE_VERSION=1341
>>>> -DCR_CLANG_REVISION=\"llvmorg-15-init-9576-g75f9e83a-2\" -DCOMPONENT_BUILD
>>>> -D_LIBCPP_ABI_UNSTABLE -D_LIBCPP_ABI_VERSION=Cr -D_LIBCPP_ENABLE_NODISCARD
>>>> -D_LIBCPP_DEBUG=0
>>>> -DCR_LIBCXX_REVISION=79a2e924d96e2fc1e4b937c42efd08898fa472d7
>>>> -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -D_DEBUG
>>>> -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DCPPGC_VERIFY_HEAP -DENABLE_DISASSEMBLER
>>>> -DV8_TYPED_ARRAY_MAX_SIZE_IN_HEAP=64 -DOBJECT_PRINT -DVERIFY_HEAP
>>>> -DV8_TRACE_MAPS -DV8_ENABLE_ALLOCATION_TIMEOUT -DV8_ENABLE_FORCE_SLOW_PATH
>>>> -DV8_ENABLE_DOUBLE_CONST_STORE_CHECK -DV8_INTL_SUPPORT
>>>> -DENABLE_HANDLE_ZAPPING -DV8_CODE_COMMENTS -DV8_ENABLE_DEBUG_CODE
>>>> -DV8_ENABLE_HEAP_SNAPSHOT_VERIFY -DV8_SNAPSHOT_NATIVE_CODE_COUNTERS
>>>> -DV8_USE_EXTERNAL_STARTUP_DATA -DV8_ATOMIC_OBJECT_FIELD_WRITES
>>>> -DV8_ENABLE_LAZY_SOURCE_POSITIONS -DV8_SHARED_RO_HEAP
>>>> -DV8_WIN64_UNWINDING_INFO -DV8_ENABLE_REGEXP_INTERPRETER_THREADED_DISPATCH
>>>> -DV8_ENABLE_SYSTEM_INSTRUMENTATION -DV8_ENABLE_WEBASSEMBLY
>>>> -DV8_ALLOCATION_FOLDING -DV8_ALLOCATION_SITE_TRACKING
>>>> -DV8_ADVANCED_BIGINT_ALGORITHMS -DV8_ENABLE_CHECKS
>>>> -DV8_DEPRECATION_WARNINGS -DV8_IMMINENT_DEPRECATION_WARNINGS
>>>> -DV8_TARGET_ARCH_ARM -DCAN_USE_ARMV7_INSTRUCTIONS
>>>> -DCAN_USE_VFP3_INSTRUCTIONS -DCAN_USE_VFP32DREGS -DCAN_USE_NEON
>>>> -DUSE_EABI_HARDFLOAT=1 -DV8_HAVE_TARGET_OS -DV8_TARGET_OS_MACOS -DDEBUG
>>>> -DENABLE_SLOW_DCHECKS -DV8_RUNTIME_CALL_STATS -DBUILDING_V8_SHARED
>>>> -DUSING_V8_BASE_SHARED -I../.. -Igen -I../../buildtools/third_party/libc++
>>>> -I../../include -Igen/include -Wall -Werror -Wextra -Wimplicit-fallthrough
>>>> -Wunreachable-code-aggressive -Wthread-safety -Wunguarded-availability
>>>> -Wno-missing-field-initializers -Wno-unused-parameter -Wloop-analysis
>>>> -Wno-unneeded-internal-declaration -Wenum-compare-conditional -Wno-psabi
>>>> -Wno-ignored-pragma-optimize -Wno-unqualified-std-cast-call -Xclang
>>>> -no-opaque-pointers -Wshadow -fno-delete-null-pointer-checks -fno-ident
>>>> -fno-strict-aliasing -fstack-protector-strong -fcolor-diagnostics
>>>> -fmerge-all-constants
>>>> -fcrash-diagnostics-dir=../../tools/clang/crashreports -mllvm
>>>> -instcombine-lower-dbg-declare=0 -ffp-contract=off
>>>> -fcomplete-member-pointers -arch i386 -Wno-builtin-macro-redefined
>>>> -D__DATE__= -D__TIME__= -D__TIMESTAMP__= -ffile-compilation-dir=.
>>>> -no-canonical-prefixes -ftrivial-auto-var-init=pattern
>>>> -fno-omit-frame-pointer -gdwarf-4 -g2 -gdwarf-aranges -Xclang
>>>> -debug-info-kind=limited -isysroot
>>>> ../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk
>>>>
>>>> -mmacosx-version-min=10.11.0 -Wheader-hygiene -Wstring-conversion
>>>> -Wtautological-overlap-compare -Wmissing-field-initializers
>>>> -Wctad-maybe-unsupported -Wno-shadow -Wunreachable-code -O0
>>>> -fvisibility=default -Wexit-time-destructors
>>>> -Wno-undefined-bool-conversion
>>>> -Wno-tautological-undefined-compare -std=c++17 -Wno-trigraphs
>>>> -fno-aligned-new -fno-exceptions -fno-rtti -nostdinc++
>>>> -isystem../../buildtools/third_party/libc++/trunk/include
>>>> -isystem../../buildtools/third_party/libc++abi/trunk/include -c
>>>> ../../src/heap/base/asm/ia32/push_registers_asm.cc -o
>>>> obj/v8_heap_base/push_registers_asm.o
>>>> <inline asm>:2:1: error: unknown directive
>>>> .type PushAllRegistersAndIterateStack, %function
>>>> ^
>>>> <inline asm>:3:1: error: unknown directive
>>>> .hidden PushAllRegistersAndIterateStack
>>>> ^
>>>> 2 errors generated.
>>>> [12/1467] CXX obj/v8_libbase/emulated-virtual-address-subspace.o
>>>> ninja: build stopped: subcommand failed.
>>>> Error! - V8 compilation finished with errors.
>>>> ```
>>>>
>>> --
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>
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