[clang] [compiler-rt] [llvm] Skipping host target exports during cross-compilation (PR #209922)

Sat Jul 18 00:40:49 PDT 2026

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-aarch64-sve2-vla` running on `linaro-g4-02` while building `clang,compiler-rt,llvm,runtimes` at step 7 "ninja check 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/198/builds/14251

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 7 (ninja check 1) failure: stage 1 checked (failure)
...
[121/176] Generating GwpAsanTestObjects.recoverable.cpp.aarch64.o
[122/176] Generating ScudoUnitTestsObjects.gtest-all.cc.aarch64.o
[123/176] Generating FuzzedDataProviderTestObjects.FuzzedDataProviderUnittest.cpp.aarch64.o
[124/176] Generating GwpAsanTestObjects.backtrace.cpp.aarch64.o
[125/176] Generating ScudoUnitTestsObjects.combined_test.cpp.aarch64.o
[126/176] Generating FuzzerTestObjects.FuzzerUnittest.cpp.aarch64.o
[127/176] Generating FuzzerTestObjects.gtest-all.cc.aarch64.o
[128/176] Generating GwpAsanTestObjects.gtest-all.cc.aarch64.o
[129/176] Linking CXX static library flang-rt/lib/Testing/libNonGTestTesting.a
[130/176] Linking CXX executable flang-rt/unittests/Evaluate/reshape.test
FAILED: flang-rt/unittests/Evaluate/reshape.test 
: && /home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/stage1/./bin/clang++ --target=aarch64-unknown-linux-gnu -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -fuse-ld=lld -Wl,--color-diagnostics flang-rt/unittests/Evaluate/CMakeFiles/reshape.test.dir/reshape.cpp.o -o flang-rt/unittests/Evaluate/reshape.test  flang-rt/lib/Testing/libNonGTestTesting.a  /home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/stage1/lib/clang/24/lib/aarch64-unknown-linux-gnu/libflang_rt.runtime.a  -lLLVMSupport && :
ld.lld: error: unable to find library -lLLVMSupport
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
[131/176] Linking CXX executable flang-rt/unittests/Evaluate/ISO-Fortran-binding.test
FAILED: flang-rt/unittests/Evaluate/ISO-Fortran-binding.test 
: && /home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/stage1/./bin/clang++ --target=aarch64-unknown-linux-gnu -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Xclang -fno-pch-timestamp -O3 -DNDEBUG -fuse-ld=lld -Wl,--color-diagnostics flang-rt/unittests/Evaluate/CMakeFiles/ISO-Fortran-binding.test.dir/ISO-Fortran-binding.cpp.o -o flang-rt/unittests/Evaluate/ISO-Fortran-binding.test  flang-rt/lib/Testing/libNonGTestTesting.a  /home/tcwg-buildbot/worker/clang-aarch64-sve2-vla/stage1/lib/clang/24/lib/aarch64-unknown-linux-gnu/libflang_rt.runtime.a  -lLLVMSupport && :
ld.lld: error: unable to find library -lLLVMSupport
clang++: error: linker command failed with exit code 1 (use -v to see invocation)
[132/176] Generating ScudoCxxUnitTest-aarch64-Test
[133/176] Generating GwpAsan-aarch64-Test
[134/176] Generating Fuzzer-aarch64-Test
[135/176] Generating TsanRtlTest-aarch64-Test
[136/176] Generating ScudoCUnitTest-aarch64-Test
[137/176] Generating TsanUnitTest-aarch64-Test
[138/176] Generating ScudoUnitTest-aarch64-Test
[139/176] Generating FuzzedDataProviderTestObjects.gtest-all.cc.aarch64.o
[140/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/CrashHandlerFixture.cpp.o
[141/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Ragged.cpp.o
[142/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Exceptions.cpp.o
[143/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/BufferTest.cpp.o
[144/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/TypeCode.cpp.o
[145/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/LogicalFormatTest.cpp.o
[146/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Stop.cpp.o
[147/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Derived.cpp.o
[148/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/InputExtensions.cpp.o
[149/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Random.cpp.o
[150/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Time.cpp.o
[151/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Assign.cpp.o
[152/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Pointer.cpp.o
[153/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Support.cpp.o
[154/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/MiscIntrinsic.cpp.o
[155/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/TemporaryStack.cpp.o
[156/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Allocatable.cpp.o
[157/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/LeadingZeroTest.cpp.o
[158/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/ArrayConstructor.cpp.o
[159/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/RuntimeCrashTest.cpp.o
[160/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Numeric.cpp.o
[161/176] Building CXX object flang-rt/unittests/Runtime/CMakeFiles/RuntimeTests.dir/Inquiry.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/209922