================
@@ -382,38 +382,6 @@ void BareMetal::AddClangCXXStdlibIncludeArgs(const ArgList
&DriverArgs,
}
}
-void BareMetal::AddCXXStdlibLibArgs(const ArgList &Args,
- ArgStringList &CmdArgs) const {
- switch (GetCXXStdlibType(Args)) {
- case ToolChain::CST_Libcxx:
- CmdArgs.push_back("-lc++");
- if (Args.hasArg(options::OPT_fexperimental_library))
- CmdArgs.push_back("-lc++experimental");
- CmdArgs.push_back("-lc++abi");
----------------
smithp35 wrote:
Yes I can confirm that leaving out -lc++abi does cause build failures with our
C++ samples with undefined symbols from libc++abi.
The lld command (paths shortened for brevity) coming out of `clang++
--target=armv6m-none-eabi -march=armv6m -mfpu=none -mfloat-abi=soft
-lcrt0-semihost -lsemihost -g -T ../../ldscripts/microbit.ld -o hello-exn.elf
hello-exn.cpp`
```
"bin/ld.lld" -lcrt0-semihost -lsemihost /tmp/hello-exn-5244ae.o -Bstatic -EL -T
../../ldscripts/microbit.ld
-Lbin/../lib/clang-runtimes/arm-none-eabi/armv6m_soft_nofp_exn_rtti/lib
-Llib/clang/20/lib/armv6m-unknown-none-eabi
-Lbin/../lib/clang-runtimes/arm-none-eabi/armv6m_soft_nofp_exn_rtti/lib -lc++
-lm b\
in/../lib/clang-runtimes/arm-none-eabi/armv6m_soft_nofp_exn_rtti/lib/libclang_rt.builtins.a
-lc --target2=rel -o hello-exn.elf
ld.lld: error: undefined symbol: operator new(unsigned int)
...
ld.lld: error: undefined symbol: __cxa_allocate_exception
...
```
https://github.com/llvm/llvm-project/pull/101259
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