rImGui using cimgui in a C raylib project

# source: https://twitter.com/Lucrecious_/status/1776868747220775367
# author: Luca @Lucrecious_
warning_flags = -Wall -Wextra -pedantic
osx_flags = -framework CoreVideo -framework IOKit -framework Cocoa -framework GLUT -framework OpenGL

raylib_flags = -lm -lraylib
raylib_headers = raylib/src
raylib_libs = raylib/src

cimgui_libs = cimgui
cimgui_headers = cimgui
cimgui_flags = -lcimgui

rlimgui_libs = rlImGui
rlimgui_headers = rlImGui
rlimgui_flags = -lrlImGui

CCFLAGS = $(warning_flags)

ifeq ($(OS),WINDOWS_NT)
else
    UNAME_S := $(shell uname -s)
    ifeq ($(UNAME_S),Darwin)
        CCFLAGS += $(osx_flags)
    endif
endif

CCFLAGS += -L$(raylib_libs)
CCFLAGS += -I$(raylib_headers)
CCFLAGS += $(raylib_flags)


CCFLAGS += -L$(cimgui_libs)
CCFLAGS += -I$(cimgui_headers)
CCFLAGS += $(cimgui_flags)

CCFLAGS += -L$(rlimgui_libs)
CCFLAGS += -I$(rlimgui_headers)
CCFLAGS += $(rlimgui_flags)

CCFLAGS += -lstdc++

SRC = src/game.c

# for rebuild purposes
SRC_DEP = src/animator.h src/json_builder.h src/player.h src/base64.h src/lut.h src/uuid.h src/animated_sprite.h

EXE = ashfell

ashfell: $(SRC) $(SRC_DEP) $(raylib_libs)/libraylib.a $(cimgui_libs)/libcimgui.a $(rlimgui_libs)/librlImGui.a
    cc $(SRC) -o $(EXE) $(CCFLAGS)

$(raylib_libs)/libraylib.a:
    cd raylib/src && $(MAKE)


$(cimgui_libs)/libcimgui.a:
    cd cimgui && $(MAKE) CXXFLAGS='-std=c++11 -DIMGUI_DISABLE_OBSOLETE_KEYIO=1' static
# $(cimgui_libs)/libcimgui.a:
#   cd cimgui && $(MAKE) CXXFLAGS='-std=c++11' static

rlImGui_build_o_cmd = g++ -c rlImGui.cpp -o rlImGui.o -I../raylib/src -I../cimgui/imgui -std=c++11
rlImGui_build_static_cmd = ar -rc librlImGui.a rlImGui.o
$(rlimgui_libs)/librlImGui.a:
    cd rlImGui && $(rlImGui_build_o_cmd) && $(rlImGui_build_static_cmd)