C++ clang linker problem

Question

I want to do the analysis of debug information of C++ code . As I understand clang should be able to handle C++.

I tried clang myFile.cpp But I get

clang: error: unable to execute command: program not executable clang error: linker command failed due to signal 1 (use -v to see invocation).

Update: After setting path for llvm-ld it partially works.I mean if I perform
clang C:myFile.cpp -S -emit-llvm -o - it outputs some info .But it still fails for clang myFile.cpp with error

clang version 2.9 (tags/RELEASE_29/final)
Target: i686-pc-win32
Thread model: posix
 "C:/FrontEnd/llvm/bin/Debug/clang.exe" -cc1 -triple i686-pc-win32 -emit-obj -mrelax-all -disable-free -main-file-name BinarySearch_Kernels.cpp -mrelocation-model static -mdisable-fp-elim -masm-verbose -mconstructor-aliases -momit-leaf-frame-pointer -v -resource-dir C:/FrontEnd/l
lvm/bin/Debug..\lib\clang\2.9 -ferror-limit 19 -fmessage-length 280 -fcxx-exceptions -fexceptions -fms-extensions -fmsc-version=1300 -fgnu-runtime -fdiagnostics-show-option -fcolor-diagnostics -o C:/Users/ilipov/AppData/Local/Temp/cc-563130.o -x c++ C:\clang\BinarySearch_Kernels
.cpp
clang -cc1 version 2.9 based upon llvm 2.9 hosted on i686-pc-win32
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/include"
  #include "..." search starts here:
  #include <...> search starts here:
 C:/FrontEnd/llvm/bin/Debug/../lib/clang/2.9/include
 C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include
 C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include
End of search list.
 "link.exe" -out:a.out -defaultlib:libcmt -nologo C:/Users/ilipov/AppData/Local/Temp/cc-563130.o
clang: error: unable to execute command: program not executable
clang: error: linker command failed due to signal 1 (use -v to see invocation)

Any case what I want to do is to get as full debug info as possible

For example for

class stamBase
{
public:
    int get1(){return 2;};
    int get0(){return 0;}
};
class stamDer : public stamBase
{
public:
    int get1(){return 1;}
};
void func()
{
    stamDer d;
    int x = d.get1();
}

I get

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f80:128:128-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
target triple = "i686-pc-win32"
%class.stamDer = type { i8 }
define void @_Z4funcv() {
entry:
  %d = alloca %class.stamDer, align 1
  %x = alloca i32, align 4
  %call = call i32 @_ZN7stamDer4get1Ev(%class.stamDer* %d)
  store i32 %call, i32* %x, align 4
  ret void
}
define linkonce_odr i32 @_ZN7stamDer4get1Ev(%class.stamDer* %this) nounwind align 2 {
entry:
  %this.addr = alloca %class.stamDer*, align 4
  store %class.stamDer* %this, %class.stamDer** %this.addr, align 4
  %this1 = load %class.stamDer** %this.addr
  ret i32 1
}

From my investigation of clang debug info code I thought that I should get the info for stamBase too! How I run clang correctly for acceptig full debug info and preventing clang errors

Solution

I think you need to install a linker. GNU ld will be fine; you should be able to install it via your package manager.

Edit: There also is a LLVM linker, less popular, but which would run out of the box with clang once installed (just add it to the PATH a re-run clang.)

Comments

[YAKOVM]

I use clang with llvm - is there anothe option for the linker?

[Matthieu M.]

@Yakov: either ld or gold, both should work. ld has the advantage of being standard and cross-platform.

[YAKOVM]

Suppose I installed llvm-ld or GNU-ld either-ld.how should I run clang now with my cpp file?

[YAKOVM]

I have llvm-ld exe. It was added to path.But I still get the same error.

[slaphappy]

@Yakov: You should run it with -v to have more details about your error, and post relevant information here.

[YAKOVM]

-cc1 -triple i686-pc-win32 -emit-obj -mrelax-all -disable-free -main-file-n lvm/bin/Debug\..\lib\clang\2.9 -ferror-limit 19 -fmessage-length 280 -fcxx-exceptions -fexceptions -fms-extensions.cpp clang -cc1 version 2.9 based upon llvm 2.9 hosted on i686-pc-win32 ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/usr/include" #include "..." search starts here: #include <...> search starts here: C:/llvm/bin/Debug/../lib/clang/2.9/include C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\\includ

[slaphappy]

This has been stripped by the comment system, can you put that into the question ?

[echristo]

llvm-ld is not a general purpose linker and will not solve this problem. You need the developer tools for your platform installed in order to get binaries linked.