On 12/3/22 1:59 PM, zoujiaqing wrote:
```
dub build --compiler=ldc2 --arch=arm64-apple-macos
Starting Performing "debug" build using ldc2 for aarch64,
arm_hardfloat.
Building taggedalgebraic 0.11.22: building configuration [library]
Building eventcore 0.9.20+commit.4.g6744ae7: building configuration
[cfrunloop]
Building server ~master: building configuration [application]
Linking server
ld: warning: ignoring file
../../../.dub/packages/taggedalgebraic-0.11.22/taggedalgebraic/.dub/build/library-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-60F6D8BEA34F8F5E792A98EA27B02D2235262A4E0795062F91FA90871411535D/libtaggedalgebraic.a, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file
/opt/homebrew/Cellar/ldc/1.30.0_1/lib/libdruntime-ldc.a, building for
macOS-x86_64 but attempting to link with file built for macOS-arm64
ld: warning: ignoring file
.dub/build/application-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-7AC1A4B8AFD7D9F59DB01E667A3DCF19DD437F41E741F5937BDCF58FAE6AA922/server.o, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file
../../eventcore/.dub/build/cfrunloop-debug-posix.osx.darwin-aarch64.arm_hardfloat-ldc_v1.30.0-ED6AFABD5E24BB6BCED6FD74F2DE88CF39B648360CE187983206459095D4677D/libeventcore.a, building for macOS-x86_64 but attempting to link with file built for unknown-arm64
ld: warning: ignoring file
/opt/homebrew/Cellar/ldc/1.30.0_1/lib/libphobos2-ldc.a, building for
macOS-x86_64 but attempting to link with file built for macOS-arm64
Undefined symbols for architecture x86_64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see
invocation)
Error: /usr/bin/cc failed with status: 1
Error ldc2 failed with exit code 1.
```
The issue is dub. Make sure you are using the dub built for ARM.
What Apple does is if any program in the same process group is x86
specific, then all the executed programs that are universal (including
the linker) will switch to that mode.
The linker thinks you are building on x86, even though the compiler is
doing ARM64. I ran into this early on too. Switching to the dub that
ships with ldc built for ARM solved it!
-Steve
