[libc-commits] [libc] [llvm] [APFloat] Add exp function for APFloat::IEEESsingle using expf implementation from LLVM libc. (PR #143959)

Mon Dec 15 07:35:20 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `openmp-offload-amdgpu-runtime-2` running on `rocm-worker-hw-02` while building `libc,llvm` at step 5 "compile-openmp".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/10/builds/19099

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

```
Step 5 (compile-openmp) failure: build (failure)
...
0.022 [4728/64/5] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/Demangle.cpp.o
0.022 [4727/64/6] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
0.029 [4726/64/7] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
0.033 [4725/64/8] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
0.037 [4724/64/9] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
0.039 [4723/64/10] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExtensibleRTTI.cpp.o
0.046 [4722/64/11] Building C object lib/Support/BLAKE3/CMakeFiles/LLVMSupportBlake3.dir/blake3_portable.c.o
0.083 [4721/64/12] Linking CXX shared library lib/libLLVMDemangle.so.22.0git
0.092 [4720/64/13] Creating library symlink lib/libLLVMDemangle.so
0.165 [4719/64/14] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/lib/Support -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/llvm/lib/Support -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/include -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/llvm/include -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/llvm/../third-party/siphash/include -I/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.build/include/../../libc -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fPIC -UNDEBUG -Wno-c99-extensions -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -MD -MT lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -MF lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o.d -o lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o -c /home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/llvm/lib/Support/APFloat.cpp
/home/botworker/builds/openmp-offload-amdgpu-runtime-2/llvm.src/llvm/lib/Support/APFloat.cpp:32:10: fatal error: shared/math.h: No such file or directory
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
0.188 [4719/63/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
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0.395 [4719/57/21] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
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0.449 [4719/45/33] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DynamicAPInt.cpp.o
0.457 [4719/44/34] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ELFAttributes.cpp.o
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0.484 [4719/41/37] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
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0.603 [4719/32/46] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FoldingSet.cpp.o
0.606 [4719/31/47] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaAlgorithm.cpp.o

```

</details>

https://github.com/llvm/llvm-project/pull/143959