[LLVMdev] How to get llvm bitcode executed

[Xiaolong Tang]

Guess I have found some clues. Some necessary libraries have to be
loaded while trying to generate native code or do interpretation. Then
another question emerges: Is there a way to determine the necessary
libraries in need? And where to locate these necessary libraries?

Xiaolong

> Hi All, 
> 
> I have a program that uses C++ STL a lot. To have the source code for
> STL functions, I undefined "_GLIBCXX_EXTERN_TEMPLATE" in
> c++config.h. In spite of this, after compilation (via clang) and
> linking (via llvm-ld), the resulting bitcode contains a few declared
> functions (with no definitions).
> 
> My question is: In the scenario where some function definitions are
> missing in a llvm bitcode, can we get a way to run this module via llc
> or lli? Or is there any way to make these function definitions
> available in the llvm bitcode? 
> 
> Specifically, these missing functions are as below: 
> 
>   declare i8* @llvm.eh.exception() nounwind readonly
>   declare i32 @__gxx_personality_v0(...)
>   declare i32 @llvm.eh.selector(i8*, i8*, ...) nounwind
>   declare void @llvm.eh.resume(i8*, i32)
>   declare void @_ZSt9terminatev()
>   declare i32 @memcmp(i8*, i8*, i64)
>   declare i64 @llvm.expect.i64(i64, i64) nounwind readnone
>   declare void @_ZSt19__throw_logic_errorPKc(i8*) noreturn
>   declare i8* @__cxa_begin_catch(i8*)
>   declare void @__cxa_rethrow()
>   declare void @__cxa_end_catch()
>   declare void @__cxa_call_unexpected(i8*)
>   declare void @_ZdlPv(i8*) nounwind
>   declare void @_ZSt20__throw_length_errorPKc(i8*) noreturn
>   declare void @_ZSt17__throw_bad_allocv() noreturn
>   declare noalias i8* @_Znwm(i64)
>   declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
>   declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
>   declare i32 @llvm.atomic.load.add.i32.p0i32(i32* nocapture, i32) nounwind
>   declare void @llvm.memory.barrier(i1, i1, i1, i1, i1) nounwind
>   declare void @_ZSt20__throw_out_of_rangePKc(i8*) noreturn
>   declare i64 @strlen(i8*)
>   declare void @abort()
> 
> 
> Xiaolong