DirectSound using MinGW: undefined reference 'DirectSoundCreate8' - c++

Question

I want to use the DirectSound API (from DirectX) to process the audio Windows outputs. To do so, I created "libdsound.a" as described in the following paragraphs, because it seems like I cannot use .dll s or .lib s for the MinGW g++ compiler.
I installed the DirectX SDK and copied the dsound.lib to a folder called "directsound". From the mingw-w64 repository, I downloaded dsound.h and dsound.def to the directory "directsound" as well (all files I used were for x86).
Following this guide I used the dlltool command line to create the libdsound.a:
dlltool -d dsound.def -l libdsound.a
In CLion, I set up CMake in CMakeLists.txt the following way:
cmake_minimum_required(VERSION 3.9)
project(fourier)
set(CMAKE_CXX_STANDARD 11)
link_directories(PATHTOTHISDIR/directsound)
include_directories(PATHTOTHISDIR/directsound)
add_executable(fourier main.cpp)
target_link_libraries(fourier dsound)
CLion says the CMakeLists.txt file is fine. Every time I try to compile the program, building and linking seems to work fine, but then I get the following error message:
[ 50%] Building CXX object CMakeFiles/fourier.dir/main.cpp.obj
[100%] Linking CXX executable fourier.exe
CMakeFiles\fourier.dir/objects.a(main.cpp.obj): In function `main':
PATHTOPROJECT/main.cpp:11: undefined reference to `DirectSoundCreate8'
collect2.exe: error: ld returned 1 exit status
...
This is how main.cpp (the only source file) looks like:
#pragma comment(lib, "libdsound.a")
#include <windows.h>
#include <dsound.h>
int main() {
LPDIRECTSOUND8 directsound;
DirectSoundCreate8(NULL, &directsound, NULL);
WAVEFORMATEX waveformat;
// ....
EDIT Was able to resolve it thanks to the advice of VTT. The way I created the libdsound.a was wrong. It should've been done like this:
dlltool -D dsound.dll -d dsound.def -l libsound.a -k
I should have also created the .def file on my own.
reimp -c -d dsound.lib
The dsound.dll should be placed in the same directory as the executable.