Unable to find GCC Code coverage libgcov.so for arm toolchain

1
votes

Steps to Reproduce the issue

#include<iostream>
int main(){
    std::cout <<  "Hello World" << std::endl;
}

  1. Write main.cpp

  2. Download Toolchain from this link

  3. Compile with below commands.

    • . /opt/poky/1.6/environment-setup-armv7a-vfp-neon-poky-linux-gnueabi
    • arm-poky-linux-gnueabi-g++ main.cpp -o main --coverage

  4. Will get an error like below.

Error

/opt/poky/1.6.1/sysroots/i686-pokysdk-linux/usr/libexec/arm-poky-linux-gnueabi/gcc/arm-poky-linux-gnueabi/4.8.3/ld: cannot find -lgcov collect2: error: ld returned 1 exit status

Problem Statement

How to generate a libgcov.so file for ARM poky toolchain?

-fprofile-args --coverage -ftest-coverage

I'm able to generate a the code coverage report using x86 linux g++ compiler by installing

- sudo apt-get install gcovr
- g++ main.cpp -o main --coverage

Is there any source code or git repository from which I can generate the libgcov.so file for the ARM poky toolchain? Or Is there any solution to get the coverage of a program from ARM poky toolchain?

I have tried cloning and compiling the below repository as a library but the issue is not resolved.

https://github.com/reeteshranjan/libgcov-embedded

How to generate the code coverage report file for a program written using ARM toolchain(poky 1.6) on Ubuntu 18.04?

c++g++yoctogcovgcovr
Is there any source code github.com/gcovr/gcovr – KamilCuk
After adding the -coverage flag, we are getting gcno files but not gcda file. Gcda file is having the coverage information which is not getting generated hence the coverage is shown as 0 – Thomas Easo
Gcda file Is not generated since it’s throwing a linker error unable to find -lgcov – Thomas Easo
Gcov is part of GCC, and can't really be distributed separately. If the linker fails to resolve this, this could indicate that your cross-compilation configuration is broken. I haven't done so myself, but I know of people who have used gcov and gcovr on ARM successfully. There is no GCC 8.25, maybe that's part of the problem? Most recent 8.x release is 8.4. – amon
You must use the gcov binary from the cross-compilation toolchain, not the gcov from your default GCC installation. If you invoked the compiler as /some/path/g++-8 you need to use /some/path/gcov-8. When you later use gcovr, you must also provide this path as the --gcov-executable. This will get rid of the version warning, but if the "no function found" error persists then the .gcda is still empty. – amon