Some Runtime Libraries Not Supported

Error Information

1

undefined reference to `__muloti4'

Problem

A symbol is in compiler-rt instead of libgcc, especially when an inline function in the __builtin_*_overflow family of Clang is used.

Solution

Use --rtlib=compiler-rt to enable compiler-rt. This solution is applicable only to some platforms.

If libc++ or libc++abi is selected, use compiler-rt instead of libgcc_s by adding -DLIBCXX_USE_COMPILER_RT=YES and -DLIBCXXABI_USE_COMPILER_RT=YES to CMake configurations. If this configuration is not performed, two runtime libraries may be linked. Although program functions are not affected, unnecessary performance loss may occur. For details about the configuration specifications, see the LLVM official toolchain documentation.