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

Mon Dec 15 10:23:40 PST 2025

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `bolt-aarch64-ubuntu-nfc` running on `bolt-worker-aarch64` while building `libc,llvm` at step 7 "build-bolt".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/217/builds/4041

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

```
Step 7 (build-bolt) failure: build (failure)
...
0.491 [2160/34/2] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/ItaniumDemangle.cpp.o
0.493 [2159/34/3] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangle.cpp.o
0.493 [2158/34/4] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
0.494 [2157/34/5] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
0.497 [2156/34/6] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/DLangDemangle.cpp.o
0.514 [2155/34/7] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ABIBreak.cpp.o
0.525 [2154/34/8] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/COM.cpp.o
0.531 [2153/34/9] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AutoConvert.cpp.o
0.566 [2152/34/10] Linking CXX static library lib/libLLVMDemangle.a
0.725 [2151/34/11] 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 -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/workspace/bolt-aarch64-ubuntu-nfc/build/lib/Support -I/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/llvm/lib/Support -I/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/build/include -I/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/llvm/include -I/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/llvm/../third-party/siphash/include -I/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/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-dangling-reference -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 -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/buildbot/workspace/bolt-aarch64-ubuntu-nfc/llvm-project/llvm/lib/Support/APFloat.cpp
/home/buildbot/workspace/bolt-aarch64-ubuntu-nfc/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.
0.729 [2151/33/12] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BuryPointer.cpp.o
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1.067 [2151/30/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CrashRecoveryContext.cpp.o
1.143 [2151/29/16] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/circular_raw_ostream.cpp.o
1.161 [2151/28/17] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertEBCDIC.cpp.o
1.167 [2151/27/18] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CRC.cpp.o
1.175 [2151/26/19] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/Allocator.cpp.o
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1.284 [2151/20/25] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
1.300 [2151/19/26] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
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1.459 [2151/13/32] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ConvertUTFWrapper.cpp.o
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2.224 [2151/6/39] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
2.304 [2151/5/40] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AMDGPUMetadata.cpp.o
2.484 [2151/4/41] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMAttributeParser.cpp.o
3.763 [2151/3/42] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APInt.cpp.o
3.981 [2151/2/43] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/BalancedPartitioning.cpp.o
5.745 [2151/1/44] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/CommandLine.cpp.o

```

</details>

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