Issue while linking GLFW3 precompiled Libs to C++ Project using Makefile - c++

Question

following issue: i'm currently working on some small c++ project, and i use imgui for the user interface. For that to work tho, i also need glfw(3). So i downloaded both the precompiled headers for osx and windows (https://www.glfw.org/download). And i added them to my project.
+---shared
+---lib
\---glfw
+---osx
| libglfw.3.dylib
| libglfw3.a
|
\---win
glfw3.dll
libglfw3.a
libglfw3dll.a
The next step (at least what i tried) was adding the lib .a file in the linkin process after creating the object files from my own sourcecode. I did this by specifying the -Lshared/lib/glfw/$(OS) path as well as the -lglfw3 flag. I did not get an error from those two. But when i run the linker, i get the following error message:
g++ -g -Wall -c -o src/core/src/main.o src/core/src/main.cpp
g++ -g -Wall -Ishared/include -Lshared/lib/glfw/win -lglfw3 -o bin/core src/core/src/main.o
c:/programdata/chocolatey/lib/mingw/tools/install/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: src/core/src/main.o:C:\Users\REDACTED\Desktop\LS/src/core/src/main.cpp:10: undefined reference to `glfwSetErrorCallback'
collect2.exe: error: ld returned 1 exit status
make: *** [makefile:78: core] Error 1
As far as i understand, this means that the linking of the library was not successfull.
( the code from src/core/src/main.cpp for completeness )
#include <stdio.h>
#include "../../../shared/include/glfw/glfw3.h"
static void glfw_error_callback(int error, const char *description)
{
}
int main(int argc, char *argv[])
{
glfwSetErrorCallback(glfw_error_callback);
printf("Hello World!\n");
return 0;
}
makefile code:
# ------------------------
# --- Global Settings ----
# ------------------------
CC = g++
# --------------------
# --- Common Flags ---
# --------------------
CFLAGS = -g -Wall
LDFLAGS = -I$(INCLUDE)
# Add correct glfw bins for either windows or osx
ifeq ($(OS), Windows_NT)
LDFLAGS += -L$(LIB)/glfw/win
else
LDFLAGS += -L$(LIB)/glfw/osx
endif
LDFLAGS += -lglfw3
# --------------
# --- Paths ----
# --------------
SRC = src
SHARED = shared
INCLUDE = $(SHARED)/include
LIB = $(SHARED)/lib
BIN = bin
DOCS = docs
# ---------------------
# --- Project Paths ---
# ---------------------
pCORE = $(SRC)/core
pIMPORTER = $(SRC)/importer
pEXPORTER = $(SRC)/exporter
pPROCESSOR = $(SRC)/processor
pUNIVERSALCLIENT = $(SRC)/universalclient
# --------------------------
# --- Housekeeping Tasks ---
# --------------------------
clean:
ifeq ($(OS), Windows_NT)
-del /s /q *.o
-rmdir /s /q $(BIN)
else
-find . -type f -name '*.o' -exec rm -f {} \;
-rm -rf $(BIN)
endif
clean_objs:
ifeq ($(OS), Windows_NT)
-del /s /q *.o
else
-find . -type f -name '*.o' -exec rm -f {} \;
-rm -rf $(BIN)
endif
setup:
ifeq ($(OS), Windows_NT)
-mkdir $(BIN)
else
-mkdir -p $(BIN)
endif
# ------------------------------------
# --- Shared Libraries Build Rules ---
# ------------------------------------
# ---------------------------
# --- Project Build Rools ---
# ---------------------------
pCORE_SRC = $(wildcard $(pCORE)/src/*.cpp)
pCORE_OBJ = $(patsubst %.cpp, %.o, $(pCORE_SRC))
core: $(pCORE_OBJ)
$(CC) $(CFLAGS) $(LDFLAGS) -o $(BIN)/core $^
$(pCORE_OBJ): $(pCORE_SRC)
$(CC) $(CFLAGS) -c -o $# $<
i worked myself through many documentations on how to link a library. Does someone understand whats going wrong or could someone explain it to me?
( regarding cmake: please don't ask - i can't use it for this project )