FreeBSD: ld.lld: error: -r and --export-dynamic may not be used together

[jakepetroules]

Building an executable package from template fails with the following error:

# swift build --build-system swiftbuild
error: /root/testpkg/Package.swift Linker command failed with exit code 1 (use -v to see invocation)
error: Ld /root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd/ExecutableModules/testpkg-4A664059B3045C89-testable.o normal failed with a nonzero exit code. Command line:     cd /root/testpkg
    /root/usr/bin/clang -target x86_64-unknown-freebsd14.3 -r --sysroot / -O0 -L/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/EagerLinkingTBDs/Debug-freebsd -L/root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd -L/root/usr/lib @/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/testpkg.build/Debug-freebsd/testpkg-4A664059B3045C89-testable.build/Objects-normal/x86_64/testpkg-4A664059B3045C89-testable.LinkFileList -nostdlib -rdynamic -fuse-ld\=lld -o /root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd/ExecutableModules/testpkg-4A664059B3045C89-testable.o
error: Ld /root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd/testpkg normal failed with a nonzero exit code. Command line:     cd /root/testpkg
    /root/usr/bin/swiftc -target x86_64-unknown-freebsd14.3 -emit-executable -sysroot / -L/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/EagerLinkingTBDs/Debug-freebsd -L/root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd -L/root/usr/lib @/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/testpkg.build/Debug-freebsd/testpkg.build/Objects-normal/x86_64/testpkg.LinkFileList -Xlinker --gc-sections -Xclang-linker -rdynamic -lswiftCore -lswiftSwiftOnoneSupport -L/root/usr/lib/swift/freebsd -L/usr/lib/swift @/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/testpkg.build/Debug-freebsd/testpkg.build/Objects-normal/x86_64/testpkg.autolink -use-ld\=lld -o /root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd/testpkg
error: Build failed
root@freebsd:~/testpkg # swift --version
Swift version 6.3-dev (LLVM c9d322e8f6b5e97, Swift f149a8bce4ce25b)
Target: x86_64-unknown-freebsd14.3
Build config: +assertions

Invoking the link command shows the real error:

# /root/usr/bin/clang -target x86_64-unknown-freebsd14.3 -r --sysroot / -O0 -L/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/EagerLinkingTBDs/Debug-freebsd -L/root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd -L/root/usr/lib @/root/testpkg/.build/x86_64-unknown-freebsd/Intermediates.noindex/testpkg.build/Debug-freebsd/testpkg-4A664059B3045C89-testable.build/Objects-normal/x86_64/testpkg-4A664059B3045C89-testable.LinkFileList -nostdlib -rdynamic -fuse-ld\=lld -o /root/testpkg/.build/x86_64-unknown-freebsd/Products/Debug-freebsd/ExecutableModules/testpkg-4A664059B3045C89-testable.o
ld.lld: error: -r and --export-dynamic may not be used together

This package succeeds with the native build system and fails with Swift Build.