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

Mon Dec 15 07:29:57 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `lldb-x86_64-debian` running on `lldb-x86_64-debian` while building `libc,llvm` at step 4 "build".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/162/builds/37138

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

```
Step 4 (build) failure: build (failure)
...
2.223 [6873/72/42] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
2.231 [6872/72/43] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FoldingSet.cpp.o
2.233 [6871/72/44] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MathExtras.cpp.o
2.241 [6870/72/45] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Base64.cpp.o
2.285 [6869/72/46] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InitLLVM.cpp.o
2.340 [6868/72/47] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/HexagonAttributeParser.cpp.o
2.363 [6867/72/48] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntervalMap.cpp.o
2.395 [6866/72/49] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FormatVariadic.cpp.o
2.407 [6865/72/50] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/LEB128.cpp.o
2.408 [6864/72/51] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
FAILED: lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o 
/usr/bin/clang++ -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/worker/2.0.1/lldb-x86_64-debian/build/lib/Support -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/Support -I/home/worker/2.0.1/lldb-x86_64-debian/build/include -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/include -I/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/../third-party/siphash/include -I/home/worker/2.0.1/lldb-x86_64-debian/build/include/../../libc -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 -pedantic -Wno-long-long -Wc++98-compat-extra-semi -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 -Werror=global-constructors -O3 -DNDEBUG -std=c++17 -UNDEBUG -Wno-c99-extensions  -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/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/Support/APFloat.cpp
/home/worker/2.0.1/lldb-x86_64-debian/llvm-project/llvm/lib/Support/APFloat.cpp:32:10: fatal error: 'shared/math.h' file not found
   32 | #include "shared/math.h"
      |          ^~~~~~~~~~~~~~~
1 error generated.
2.459 [6864/71/52] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Locale.cpp.o
2.465 [6864/70/53] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/KnownFPClass.cpp.o
2.477 [6864/69/54] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ExponentialBackoff.cpp.o
2.529 [6864/68/55] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CSKYAttributeParser.cpp.o
2.534 [6864/67/56] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamRef.cpp.o
2.539 [6864/66/57] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ErrorHandling.cpp.o
2.553 [6864/65/58] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamWriter.cpp.o
2.612 [6864/64/59] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/LineIterator.cpp.o
2.681 [6864/63/60] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BinaryStreamReader.cpp.o
2.699 [6864/62/61] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DataExtractor.cpp.o
2.729 [6864/61/62] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/OptionStrCmp.cpp.o
2.767 [6864/60/63] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/GraphWriter.cpp.o
2.774 [6864/59/64] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MSP430Attributes.cpp.o
2.775 [6864/58/65] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Optional.cpp.o
2.777 [6864/57/66] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FileOutputBuffer.cpp.o
2.778 [6864/56/67] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Debug.cpp.o
2.833 [6864/55/68] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MemoryBufferRef.cpp.o
2.856 [6864/54/69] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/RISCVAttributes.cpp.o
2.873 [6864/53/70] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Signposts.cpp.o
2.909 [6864/52/71] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Error.cpp.o
2.918 [6864/51/72] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ManagedStatic.cpp.o
2.925 [6864/50/73] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
2.927 [6864/49/74] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/RewriteRope.cpp.o
2.938 [6864/48/75] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangle.cpp.o
2.980 [6864/47/76] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/RewriteBuffer.cpp.o
2.987 [6864/46/77] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/PrettyStackTrace.cpp.o
3.011 [6864/45/78] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Regex.cpp.o
3.019 [6864/44/79] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/OptimizedStructLayout.cpp.o
3.024 [6864/43/80] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/GlobPattern.cpp.o
3.028 [6864/42/81] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/FileCollector.cpp.o
3.050 [6864/41/82] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/DAGDeltaAlgorithm.cpp.o
3.067 [6864/40/83] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ModRef.cpp.o
3.069 [6864/39/84] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/MSP430AttributeParser.cpp.o

```

</details>

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