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

Mon Dec 15 07:57:51 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-x86_64-sie-ubuntu-fast` running on `sie-linux-worker` while building `libc,llvm` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/144/builds/42306

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

```
Step 5 (build-unified-tree) failure: build (failure)
...
0.033 [4931/40/6] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
0.034 [4930/40/7] Building CXX object lib/CAS/CMakeFiles/LLVMCAS.dir/BuiltinCAS.cpp.o
0.037 [4929/40/8] Building CXX object lib/CAS/CMakeFiles/LLVMCAS.dir/ActionCache.cpp.o
0.037 [4928/40/9] Building CXX object lib/CAS/CMakeFiles/LLVMCAS.dir/ActionCaches.cpp.o
0.039 [4927/40/10] Building CXX object lib/CAS/CMakeFiles/LLVMCAS.dir/BuiltinUnifiedCASDatabases.cpp.o
0.048 [4926/40/11] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
0.056 [4925/40/12] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
0.083 [4924/40/13] Linking CXX static library lib/libLLVMDemangle.a
0.096 [4923/40/14] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
0.294 [4922/40/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o 
CCACHE_CPP2=yes CCACHE_HASHDIR=yes CCACHE_SLOPPINESS=pch_defines,time_macros /usr/bin/ccache /usr/bin/g++ -DGTEST_HAS_RTTI=0 -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/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/lib/Support -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Support -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/build/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/../third-party/siphash/include -I/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/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 -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/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Support/APFloat.cpp
/home/buildbot/buildbot-root/llvm-clang-x86_64-sie-ubuntu-fast/llvm-project/llvm/lib/Support/APFloat.cpp:32:10: fatal error: shared/math.h: No such file or directory
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
0.450 [4922/39/16] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
0.578 [4922/38/17] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaTree.cpp.o
0.748 [4922/37/18] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTF.cpp.o
0.782 [4922/36/19] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
0.846 [4922/35/20] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
0.866 [4922/34/21] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64BuildAttributes.cpp.o
0.888 [4922/33/22] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AllocToken.cpp.o
0.898 [4922/32/23] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMWinEH.cpp.o
0.910 [4922/31/24] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
0.913 [4922/30/25] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
1.033 [4922/29/26] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
1.059 [4922/28/27] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Chrono.cpp.o
1.087 [4922/27/28] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o
1.126 [4922/26/29] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
1.152 [4922/25/30] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributes.cpp.o
1.175 [4922/24/31] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Compression.cpp.o
1.187 [4922/23/32] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
1.225 [4922/22/33] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BlockFrequency.cpp.o
1.274 [4922/21/34] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BranchProbability.cpp.o
1.276 [4922/20/35] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamError.cpp.o
1.321 [4922/19/36] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DeltaAlgorithm.cpp.o
1.324 [4922/18/37] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
1.325 [4922/17/38] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Base64.cpp.o
1.380 [4922/16/39] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributeParser.cpp.o
1.525 [4922/15/40] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamRef.cpp.o
1.583 [4922/14/41] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamWriter.cpp.o
1.668 [4922/13/42] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
1.707 [4922/12/43] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Debug.cpp.o
1.712 [4922/11/44] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamReader.cpp.o
1.856 [4922/10/45] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Caching.cpp.o
1.898 [4922/9/46] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CachePruning.cpp.o
1.919 [4922/8/47] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DebugCounter.cpp.o
1.929 [4922/7/48] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o

```

</details>

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