Configuring Cmake file for library dependency

Question

I have a C project that I am trying to compile using CMake. This is my project structure:

root
 ├─ CMakeLists.txt
 ├─ docs
 ├─ build
 └─ src
   ├─ main.c
   ├─ library1.h
   ├─ library2.h
   ├─ ...

The project needs unit tests for which I'm using CMocka, which is referenced in main.c :

#include <stdio.h>
#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>

void test_example()
{
    assert_true(1);
}

int main(void)
{
    const struct CMUnitTest tests[] = {
        cmocka_unit_test(test_example),
    };

    return cmocka_run_group_tests(tests, NULL, NULL);
}

I've written a CMake file for compiling all the source files from into the build directory, but it's not working properly:

make[2]: Entering directory '/home/radu/workspace/c/tls-server/build'
[ 50%] Building C object CMakeFiles/craking.dir/src/main.c.o
/usr/bin/cc   -std=c99 -lcmocka   -o CMakeFiles/craking.dir/src/main.c.o   -c /home/radu/workspace/c/tls-server/src/main.c
[100%] Linking C executable craking
/usr/bin/cmake -E cmake_link_script CMakeFiles/craking.dir/link.txt --verbose=1
/usr/bin/cc -std=c99 -lcmocka  -rdynamic CMakeFiles/craking.dir/src/main.c.o  -o craking 
/usr/bin/ld: CMakeFiles/craking.dir/src/main.c.o: in function `test_example':
main.c:(.text+0x1d): undefined reference to `_assert_true'
/usr/bin/ld: CMakeFiles/craking.dir/src/main.c.o: in function `main':
main.c:(.text+0x88): undefined reference to `_cmocka_run_group_tests'
collect2: error: ld returned 1 exit status

In the above, I've noticed that the parameter order is wrong: /usr/bin/cc -std=c99 -lcmocka -rdynamic CMakeFiles/craking.dir/src/main.c.o -o craking

Whereas I think it should be: /usr/bin/cc CMakeFiles/craking.dir/src/main.c.o -std=c99 -lcmocka -rdynamic -o craking

CMake seems to inverse the paramter order which causes problems with the linker, but I have no idea how to fix this. Here is my CMake file:

cmake_minimum_required(VERSION 3.0)
project(craking)

file(GLOB_RECURSE src
    "src/*.h"
    "src/*.c"
)

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}-std=c99 -lcmocka")
add_executable(${PROJECT_NAME} src/main.c)

Any ideas?