CMake Debug Symbols Missing

Question

I recently started using CMake and I haven't been able to figure out how to get my debug symbols to work for Valgrind. So, I made a test project to demonstrate my problem. Without CMake, I would just compile with -g:

g++ -std=c++11 -g main.cpp -o test

and I get the test.dSYM directory that I want. According to How do you set GDB debug flag with cmake?, to get the -g flag, I should use the argument

-D CMAKE_BUILD_TYPE=Debug

So that is what I tried. In a folder named Testing, I created a test file main.cpp with the following contents:

#include <iostream>
using std::cout;

int main( int argc , const char* argv[] ) {
    int* leak = new int;
    int arr[] = { 1 , 2 , 3 , 4 };
    for ( int i : arr ) {
        cout << i << "\n";      
    }
    return 0;
}

Inside Testing, I also created a file CMakeLists.txt with the following contents:

cmake_minimum_required( VERSION 3.1 )
project( Testing )
add_executable( test1 main.cpp )
set_property(TARGET test1 PROPERTY CXX_STANDARD 11)
set_property(TARGET test1 PROPERTY CXX_STANDARD_REQUIRED ON)

Then I created a new directory, Testing/cmake_build and in that directory I ran the following commands:

Testing/cmake_build$ cmake -D CMAKE_BUILD_TYPE=Debug ..
Testing/cmake_build$ make
Testing/cmake_build$ valgrind --leak-check=yes ./test

And Valgrind complains that the dSYM directory is missing. I looked around for it myself, and haven't found it. Thus, I don't get line numbers in the leak check output and I can't debug my project:

==2388== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==2388== Command: ./test
==2388== 
--2388-- ./test:
--2388-- dSYM directory is missing; consider using --dsymutil=yes
1
2
3
4
==2388== 
==2388== HEAP SUMMARY:
==2388==     in use at exit: 29,443 bytes in 378 blocks
==2388==   total heap usage: 472 allocs, 94 frees, 36,027 bytes allocated
==2388== 
==2388== 4 bytes in 1 blocks are definitely lost in loss record 1 of 76
==2388==    at 0x47F1: malloc (vg_replace_malloc.c:300)
==2388==    by 0x4928D: operator new(unsigned long) (in /usr/lib/libc++.1.dylib)
==2388==    by 0x1000012E5: main (in ./test)
==2388== 
==2388== LEAK SUMMARY:
==2388==    definitely lost: 4 bytes in 1 blocks
==2388==    indirectly lost: 0 bytes in 0 blocks
==2388==      possibly lost: 0 bytes in 0 blocks
==2388==    still reachable: 4,096 bytes in 1 blocks
==2388==         suppressed: 25,343 bytes in 376 blocks
==2388== Reachable blocks (those to which a pointer was found) are not shown.
==2388== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==2388== 

It should say

==2530==    by 0x1000012E5: main (main.cpp:5)

Could anyone show me how I can use CMake so that I get the dSYM directory? Thanks.

Edit 1 (make all command):

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Answer 1

Try explicitly setting the -g flag for the debug configuration by adding
set(CMAKE_CXX_FLAGS_DEBUG "-g") To your CMakeLists.txt then re-running cmake with
-DCMAKE_BUILD_TYPE=Debug