Unable to run the program

[zhangysh1995]

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I git cloned this repo and followed here to build my LLVM 4.0.0.

And use this c program under folder llvm-pass-skeleton/program/test.c to test:

/* 
 * C Program to Check whether the given Integer has an Alternate 
 * Pattern 
 */
#include <stdio.h>
 
void main()
{
    int num, x, y, count = 0;
 
    printf("enter the number:");
    scanf("%d", &num);
    x = num << 1;
    y = x ^ num;
    y = y + 1;
 
    /* Checks if the number is in powers of 2 */
    while ((y / 2) != 0)
    {
        if (y % 2 != 0)
        {
            count++;
            break;
        }
        else
        {
            y = y / 2;
        }
    }
    if (count)
    {
        printf("false");
    }
    else
    {
        printf("true");
    }
}

Then I got this error:

clang -Xclang -load -Xclang build/skeleton/libSkeletonPass.so program/test.c 
error: unable to load plugin 'build/skeleton/libSkeletonPass.so': 'build/skeleton/libSkeletonPass.so:
      undefined symbol: _ZN4llvm23EnableABIBreakingChecksE'

Similar to #4, but the default path is used when building and compiling my LLVM. This problem may be caused by LLVM version difference with reference to #11

I could use my LLVM version to run other .bc program without problem.

[sampsyo]

Indeed, as in #11, we haven't tested this with more recent versions of LLVM. As I recommended there, please look into using the LLVM version that was current when the code was written. Or, if you find the necessary changes to work with 4.0, please submit a pull request!

[overrainbow]

I had similar error when loading the plugin.

error: unable to load plugin 'skeleton/libSkeletonPass.so': 'skeleton/libSkeletonPass.so: undefined symbol: _ZNK4llvm12FunctionPass17createPrinterPassERNS_11raw_ostreamERKSs'

I found this thread https://stackoverflow.com/questions/37366291/undefined-symbol-for-self-built-llvm-opt. It works for me by adding compiler flag in llvm-pass-skeleton/skeleton/CMakeLists.txt:

set_target_properties(SkeletonPass PROPERTIES COMPILE_FLAGS "-D__GLIBCXX_USE_CXX11_ABI=0 -fno-rtti" )

Hope it helps.

[Cjkkkk]

add set(CMAKE_CXX_COMPILER "clang-9") into skeleton/CMakeList.txt solved my problem. If remove this line, then default compiler is g++ in my case, which will cause this problem. Hope it helps.