8174f33dc9
-flat_namespace makes lld emit binaries that use name lookup that's more in line with other POSIX systems: Instead of looking up symbols as (dylib,name) pairs by dyld, they're instead looked up just by name. -flat_namespace has three effects: 1. MH_TWOLEVEL and MH_NNOUNDEFS are no longer set in the Mach-O header 2. All symbols use BIND_SPECIAL_DYLIB_FLAT_LOOKUP as ordinal 3. When a dylib is added to the link, its dependent dylibs are also added, so that lld can verify that no undefined symbols remain at the end of a link with -flat_namespace. These transitive dylibs are added for symbol resolution, but they are not emitted in LC_LOAD_COMMANDs. -undefined with -flat_namespace still isn't implemented. Before this change, it was impossible to hit that combination because -flat_namespace caused a diagnostic. Now that it no longer does, emit a dedicated temporary diagnostic when both flags are used. Differential Revision: https://reviews.llvm.org/D97641
21 lines
1.0 KiB
ArmAsm
21 lines
1.0 KiB
ArmAsm
# REQUIRES: x86, aarch64
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# RUN: rm -rf %t && mkdir -p %t
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# RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t/x86_64-test.o
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# RUN: llvm-mc -filetype=obj -triple=arm64-apple-darwin %s -o %t/arm64-test.o
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# RUN: %lld -arch x86_64 -platform_version macos 10.5.0 11.0 -o %t/x86-64-executable %t/x86_64-test.o
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# RUN: %lld -arch arm64 -o %t/arm64-executable %t/arm64-test.o
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# RUN: %lld -arch x86_64 -dylib -o %t/x86-64-dylib %t/x86_64-test.o
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# RUN: %lld -arch arm64 -dylib -o %t/arm64-dylib %t/arm64-test.o
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# RUN: llvm-objdump --macho --all-headers %t/x86-64-executable | FileCheck %s -DCAPS=LIB64
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# RUN: llvm-objdump --macho --all-headers %t/arm64-executable | FileCheck %s -DCAPS=0x00
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# RUN: llvm-objdump --macho --all-headers %t/x86-64-dylib | FileCheck %s -DCAPS=0x00
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# RUN: llvm-objdump --macho --all-headers %t/arm64-dylib | FileCheck %s -DCAPS=0x00
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# CHECK: magic cputype cpusubtype caps filetype {{.*}} flags
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# CHECK-NEXT: MH_MAGIC_64 {{.*}} ALL [[CAPS]] {{.*}} NOUNDEFS {{.*}} TWOLEVEL
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.globl _main
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_main:
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ret
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