Fix build for FreeBSD arm64 w/NativeAOT

[sec]

Based on 70e1072 this PR adds same things for arm64 host.
With those changes runtime is able to build fine under FreeBSD arm64 host (there is some manual patching required with ObjWriter and UseHardlinksIfPossible property set to false on two targets and BinPlaceUseHardlinksIfPossible=false).

I was using clang14 and needed to pass extra -z nostart-stop-gc to make the build pass for crossgen2 (reading https://lld.llvm.org/ELF/start-stop-gc looks like that change was done starting from 13) - if this should be handled in diffrent way, let me know.

@Thefrank @janvorli @am11

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Issue Details

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Based on 70e1072 this PR adds same things for arm64 host.
With those changes runtime is able to build fine under FreeBSD arm64 host (there is some manual patching required with ObjWriter and UseHardlinksIfPossible property set to false on two targets and BinPlaceUseHardlinksIfPossible=false).

I was using clang14 and needed to pass extra -z nostart-stop-gc to make the build pass for crossgen2 (reading https://lld.llvm.org/ELF/start-stop-gc looks like that change was done starting from 13) - if this should be handled in diffrent way, let me know.

@Thefrank @janvorli @am11

Author:	sec
Assignees:	-
Labels:	area-NativeAOT-coreclr
Milestone:	-

[Thefrank]

FreeBSD x64 exhibits the same issue under LLVM/Clang15

ld : error : undefined symbol: __start___modules [/root/runtime/src/coreclr/tools/aot/crossgen2/crossgen2.csproj]
##vso[task.logissue type=error;sourcepath=ld;linenumber=0;columnnumber=0;code=;](NETCORE_ENGINEERING_TELEMETRY=Build) undefined symbol: __start___modules
  >>> referenced by main.cpp:182 (/root/runtime/src/coreclr/nativeaot/Bootstrap/main.cpp:182)
  >>>               main.cpp.o:(main) in archive /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libbootstrapper.a
  >>> the encapsulation symbol needs to be retained under --gc-sections properly; consider -z nostart-stop-gc (see https://lld.llvm.org/ELF/start-stop-gc)
  
ld : error : undefined symbol: __stop___modules [/root/runtime/src/coreclr/tools/aot/crossgen2/crossgen2.csproj]
##vso[task.logissue type=error;sourcepath=ld;linenumber=0;columnnumber=0;code=;](NETCORE_ENGINEERING_TELEMETRY=Build) undefined symbol: __stop___modules
  >>> referenced by main.cpp:182 (/root/runtime/src/coreclr/nativeaot/Bootstrap/main.cpp:182)
  >>>               main.cpp.o:(main) in archive /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libbootstrapper.a
clang-15 : error : linker command failed with exit code 1 (use -v to see invocation) [/root/runtime/src/coreclr/tools/aot/crossgen2/crossgen2.csproj]
##vso[task.logissue type=error;sourcepath=clang-15;linenumber=0;columnnumber=0;code=;](NETCORE_ENGINEERING_TELEMETRY=Build) linker command failed with exit code 1 (use -v to see invocation)
/root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/build/Microsoft.NETCore.Native.targets(331,5): error MSB3073: The command ""/usr/local/bin/clang15" "/root/runtime/artifacts/obj/coreclr/crossgen2/x64/Release/native/crossgen2.o" -o "/root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/crossgen2/native/crossgen2" /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libbootstrapper.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libRuntime.ServerGC.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libstdc++compat.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libnumasupportdynamic.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Globalization.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.IO.Compression.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Net.Security.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.a -g -Wl,-rpath,'$ORIGIN' -Wl,--build-id=sha1 -Wl,--as-needed -pthread -ldl -lz -lrt -lm -pie -Wl,-z,relro -Wl,-z,now -L/usr/local/lib -lgssapi_krb5 -L/usr/local/lib -linotify -Wl,--discard-all -Wl,--gc-sections" exited with code 1. [/root/runtime/src/coreclr/tools/aot/crossgen2/crossgen2.csproj]
##vso[task.logissue type=error;sourcepath=/root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/build/Microsoft.NETCore.Native.targets;linenumber=331;columnnumber=5;code=MSB3073;](NETCORE_ENGINEERING_TELEMETRY=Build) The command ""/usr/local/bin/clang15" "/root/runtime/artifacts/obj/coreclr/crossgen2/x64/Release/native/crossgen2.o" -o "/root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/crossgen2/native/crossgen2" /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libbootstrapper.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libRuntime.ServerGC.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libstdc++compat.a /root/runtime/artifacts/bin/coreclr/freebsd.x64.Release/aotsdk/libnumasupportdynamic.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Globalization.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.IO.Compression.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Net.Security.Native.a /root/runtime/artifacts/bin/microsoft.netcore.app.runtime.freebsd-x64/Release/runtimes/freebsd-x64/native/libSystem.Security.Cryptography.Native.OpenSsl.a -g -Wl,-rpath,'$ORIGIN' -Wl,--build-id=sha1 -Wl,--as-needed -pthread -ldl -lz -lrt -lm -pie -Wl,-z,relro -Wl,-z,now -L/usr/local/lib -lgssapi_krb5 -L/usr/local/lib -linotify -Wl,--discard-all -Wl,--gc-sections" exited with code 1.

Would this fix only apply to ld.lld 13 or higher?

[am11]

We added UseLlvmLinker to remedy exactly this error on linux. -p:UseLlvmLinker=true on command-line or <UseLlvmLinker>true</UseLlvmLinker> in csrpoj.

[am11]

#80613 (comment)

[sec]

We added UseLlvmLinker to remedy exactly this error on linux. -p:UseLlvmLinker=true on command-line or <UseLlvmLinker>true</UseLlvmLinker> in csrpoj.

Thanks - adding this seems to work fine with the build. does this PR makes sense to merge, as it's adding some RIDs for arm64 same way x64 was added then?

[am11]

@sec, I think it would be fine to change the defaults for FreeBSD with:

<UseLlvmLinker Condition="'$(UseLlvmLinker)' == '' and '$(TargetOS)' == 'freebsd'">true</UseLlvmLinker>

in Microsoft.NETCore.Native.Unix.targets top properties block. This way the user on FreeBSD will not need to set it (if someone is intentionally experimenting with gcc-toolchain on FreeBSD, they will still be able to do so with override properties: -p:UseLlvmLinker=false -p:CppCompilerAndLinker=gcc etc.).

[jkotas]

LGTM. Thanks!

[jkotas]

change the defaults for FreeBSD

I think it is a good idea. It can be done as a new PR.