port(MachO): Allow linking against arch arm64e-macos

[davidlattimore]

No description provided.

[davidlattimore]

It's entirely possible that I just haven't set up my system properly, but I needed these changes in order to get the existing tests to pass.

[marxin]

Just out of curiosity, what do you get on your system?

❯ sw_vers
ProductName:            macOS
ProductVersion:         26.2
BuildVersion:           25C56
❯ clang --version
Homebrew clang version 22.1.3
Target: arm64-apple-darwin25.2.0
Thread model: posix
InstalledDir: /opt/homebrew/Cellar/llvm/22.1.3/bin
Configuration file: /opt/homebrew/Cellar/llvm/22.1.3/etc/clang/arm64-apple-darwin25.cfg

[davidlattimore]

> sw_vers
ProductName:		macOS
ProductVersion:		26.4
BuildVersion:		25E246

> clang --version
Apple clang version 21.0.0 (clang-2100.1.1.101)
Target: arm64-apple-darwin25.4.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

[marxin]

Hm, interesting, your clang's Target architecture is same as mine arm64. What do you get for:
clang main.c --save-temps --verbose?

And for:

❯ otool -h a.out
a.out:
Mach header
      magic  cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
 0xfeedfacf 16777228          0  0x00           2    18       1208 0x00200085

❯ clang main.c --save-temps --verbose
Homebrew clang version 22.1.3
Target: arm64-apple-darwin25.2.0
Thread model: posix
InstalledDir: /opt/homebrew/Cellar/llvm/22.1.3/bin
Configuration file: /opt/homebrew/Cellar/llvm/22.1.3/etc/clang/arm64-apple-darwin25.cfg
System configuration file directory: /opt/homebrew/Cellar/llvm/22.1.3/etc/clang
User configuration file directory: /Users/apple/.config/clang
 "/opt/homebrew/Cellar/llvm/22.1.3/bin/clang-22" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -E -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf-no-reserve -ffp-contract=on -fno-rounding-math -funwind-tables=1 -target-sdk-version=26.2 -fcompatibility-qualified-id-block-type-checking -fvisibility-inlines-hidden-static-local-var -fdefine-target-os-macros -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.4a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/apple/Programming/testcases -target-linker-version 1266.8 -v -fcoverage-compilation-dir=/Users/apple/Programming/testcases -resource-dir /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk -internal-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/usr/local/include -internal-isystem /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22/include -internal-externc-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/usr/include -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/Frameworks -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/SubFrameworks -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/Library/Frameworks -ferror-limit 19 -fmessage-length=174 -stack-protector 1 -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcolor-diagnostics -fdwarf2-cfi-asm -o main.i -x c main.c
clang -cc1 version 22.1.3 based upon LLVM 22.1.3 default target arm64-apple-darwin25.2.0
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/usr/local/include"
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/usr/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/Frameworks (framework directory)
 /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk/System/Library/SubFrameworks (framework directory)
End of search list.
 "/opt/homebrew/Cellar/llvm/22.1.3/bin/clang-22" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-llvm-bc -emit-llvm-uselists -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf-no-reserve -ffp-contract=on -fno-rounding-math -funwind-tables=1 -target-sdk-version=26.2 -fcompatibility-qualified-id-block-type-checking -fvisibility-inlines-hidden-static-local-var -fdefine-target-os-macros -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.4a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/apple/Programming/testcases -target-linker-version 1266.8 -v -fcoverage-compilation-dir=/Users/apple/Programming/testcases -resource-dir /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22 -ferror-limit 19 -fmessage-length=174 -stack-protector 1 -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcolor-diagnostics -disable-llvm-passes -fdwarf2-cfi-asm -o main.bc -x cpp-output main.i
clang -cc1 version 22.1.3 based upon LLVM 22.1.3 default target arm64-apple-darwin25.2.0
#include "..." search starts here:
End of search list.
 "/opt/homebrew/Cellar/llvm/22.1.3/bin/clang-22" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Werror=undef-prefix -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -S -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf-no-reserve -ffp-contract=on -fno-rounding-math -funwind-tables=1 -target-sdk-version=26.2 -fcompatibility-qualified-id-block-type-checking -fvisibility-inlines-hidden-static-local-var -fdefine-target-os-macros -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.4a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/apple/Programming/testcases -target-linker-version 1266.8 -v -fcoverage-compilation-dir=/Users/apple/Programming/testcases -resource-dir /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22 -ferror-limit 19 -fmessage-length=174 -stack-protector 1 -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcolor-diagnostics -fdwarf2-cfi-asm -o main.s -x ir main.bc
clang -cc1 version 22.1.3 based upon LLVM 22.1.3 default target arm64-apple-darwin25.2.0
 "/opt/homebrew/Cellar/llvm/22.1.3/bin/clang-22" -cc1as -triple arm64-apple-macosx26.0.0 -target-sdk-version=26.2 -filetype obj -main-file-name main.c -target-cpu apple-m1 -target-feature +v8.4a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -fdebug-compilation-dir=/Users/apple/Programming/testcases -dwarf-version=5 -mrelocation-model pic -o main.o main.s
 "/usr/bin/ld" -demangle -lto_library /opt/homebrew/Cellar/llvm/22.1.3/lib/libLTO.dylib -no_deduplicate -dynamic -arch arm64 -platform_version macos 26.0.0 26.2 -syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX26.sdk -mllvm -enable-linkonceodr-outlining -o a.out main.o -lSystem /opt/homebrew/Cellar/llvm/22.1.3/lib/clang/22/lib/darwin/libclang_rt.osx.a

[davidlattimore]

clang main.c --save-temps --verbose:

Apple clang version 21.0.0 (clang-2100.1.1.101)
Target: arm64-apple-darwin25.4.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -E -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf -fno-strict-return -ffp-contract=on -fno-rounding-math -funwind-tables=1 -fobjc-msgsend-selector-stubs -fno-sized-deallocation -target-sdk-version=26.5 -fvisibility-inlines-hidden-static-local-var -fno-modulemap-allow-subdirectory-search -fdefine-target-os-macros -fno-assume-unique-vtables -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.5a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/david/tmp -target-linker-version 1267 -v -fcoverage-compilation-dir=/Users/david/tmp -resource-dir /Library/Developer/CommandLineTools/usr/lib/clang/21 -isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -I/usr/local/include -internal-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/local/include -internal-isystem /Library/Developer/CommandLineTools/usr/lib/clang/21/include -internal-externc-isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -internal-externc-isystem /Library/Developer/CommandLineTools/usr/include -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/SubFrameworks -internal-iframework /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/Library/Frameworks -Wno-elaborated-enum-base -ferror-limit 19 -fmessage-length=140 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcommon -fcolor-diagnostics -clang-vendor-feature=+disableNonDependentMemberExprInCurrentInstantiation -fno-odr-hash-protocols -clang-vendor-feature=+enableAggressiveVLAFolding -clang-vendor-feature=+revert09abecef7bbf -clang-vendor-feature=+thisNoAlignAttr -clang-vendor-feature=+thisNoNullAttr -clang-vendor-feature=+disableAtImportPrivateFrameworkInImplementationError -Wno-error=allocator-wrappers -fdwarf2-cfi-asm -o main.i -x c main.c
clang -cc1 version 21.0.0 (clang-2100.1.1.101) default target arm64-apple-darwin25.4.0
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/local/include"
ignoring nonexistent directory "/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 /Library/Developer/CommandLineTools/usr/lib/clang/21/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
 /Library/Developer/CommandLineTools/usr/include
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks (framework directory)
 /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/SubFrameworks (framework directory)
End of search list.
 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -emit-llvm-bc -emit-llvm-uselists -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf -fno-strict-return -ffp-contract=on -fno-rounding-math -funwind-tables=1 -fobjc-msgsend-selector-stubs -fno-sized-deallocation -target-sdk-version=26.5 -fvisibility-inlines-hidden-static-local-var -fno-modulemap-allow-subdirectory-search -fdefine-target-os-macros -fno-assume-unique-vtables -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.5a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/david/tmp -target-linker-version 1267 -v -fcoverage-compilation-dir=/Users/david/tmp -resource-dir /Library/Developer/CommandLineTools/usr/lib/clang/21 -Wno-elaborated-enum-base -ferror-limit 19 -fmessage-length=140 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcommon -fcolor-diagnostics -clang-vendor-feature=+disableNonDependentMemberExprInCurrentInstantiation -fno-odr-hash-protocols -clang-vendor-feature=+enableAggressiveVLAFolding -clang-vendor-feature=+revert09abecef7bbf -clang-vendor-feature=+thisNoAlignAttr -clang-vendor-feature=+thisNoNullAttr -clang-vendor-feature=+disableAtImportPrivateFrameworkInImplementationError -Wno-error=allocator-wrappers -disable-llvm-passes -fdwarf2-cfi-asm -o main.bc -x cpp-output main.i
clang -cc1 version 21.0.0 (clang-2100.1.1.101) default target arm64-apple-darwin25.4.0
#include "..." search starts here:
End of search list.
 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1 -triple arm64-apple-macosx26.0.0 -Wundef-prefix=TARGET_OS_ -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -S -dumpdir a- -save-temps=cwd -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name main.c -mrelocation-model pic -pic-level 2 -mframe-pointer=non-leaf -fno-strict-return -ffp-contract=on -fno-rounding-math -funwind-tables=1 -fobjc-msgsend-selector-stubs -fno-sized-deallocation -target-sdk-version=26.5 -fvisibility-inlines-hidden-static-local-var -fno-modulemap-allow-subdirectory-search -fdefine-target-os-macros -fno-assume-unique-vtables -fno-modulemap-allow-subdirectory-search -enable-tlsdesc -target-cpu apple-m1 -target-feature +v8.5a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -target-abi darwinpcs -debugger-tuning=lldb -fdebug-compilation-dir=/Users/david/tmp -target-linker-version 1267 -v -fcoverage-compilation-dir=/Users/david/tmp -resource-dir /Library/Developer/CommandLineTools/usr/lib/clang/21 -Wno-elaborated-enum-base -ferror-limit 19 -fmessage-length=140 -stack-protector 1 -fstack-check -mdarwin-stkchk-strong-link -fblocks -fencode-extended-block-signature -fregister-global-dtors-with-atexit -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fmax-type-align=16 -fcommon -fcolor-diagnostics -clang-vendor-feature=+disableNonDependentMemberExprInCurrentInstantiation -fno-odr-hash-protocols -clang-vendor-feature=+enableAggressiveVLAFolding -clang-vendor-feature=+revert09abecef7bbf -clang-vendor-feature=+thisNoAlignAttr -clang-vendor-feature=+thisNoNullAttr -clang-vendor-feature=+disableAtImportPrivateFrameworkInImplementationError -Wno-error=allocator-wrappers -fdwarf2-cfi-asm -o main.s -x ir main.bc
clang -cc1 version 21.0.0 (clang-2100.1.1.101) default target arm64-apple-darwin25.4.0
 "/Library/Developer/CommandLineTools/usr/bin/clang" -cc1as -triple arm64-apple-macosx26.0.0 -target-sdk-version=26.5 -filetype obj -main-file-name main.c -target-cpu apple-m1 -target-feature +v8.5a -target-feature +aes -target-feature +altnzcv -target-feature +ccdp -target-feature +ccpp -target-feature +complxnum -target-feature +crc -target-feature +dotprod -target-feature +flagm -target-feature +fp-armv8 -target-feature +fp16fml -target-feature +fptoint -target-feature +fullfp16 -target-feature +jsconv -target-feature +lse -target-feature +neon -target-feature +pauth -target-feature +perfmon -target-feature +predres -target-feature +ras -target-feature +rcpc -target-feature +rdm -target-feature +sb -target-feature +sha2 -target-feature +sha3 -target-feature +specrestrict -target-feature +ssbs -fdebug-compilation-dir=/Users/david/tmp -dwarf-version=5 -mrelocation-model pic -o main.o main.s
 "/Library/Developer/CommandLineTools/usr/bin/ld" -demangle -lto_library /Library/Developer/CommandLineTools/usr/lib/libLTO.dylib -no_deduplicate -dynamic -arch arm64 -platform_version macos 26.0.0 26.5 -syslibroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk -mllvm -enable-linkonceodr-outlining -o a.out -L/usr/local/lib main.o -lSystem /Library/Developer/CommandLineTools/usr/lib/clang/21/lib/darwin/libclang_rt.osx.a

> otool -h a.out
a.out:
Mach header
      magic  cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
 0xfeedfacf 16777228          0  0x00           2    16        744 0x00200085