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Add miniaudio audio backend to Makefile

Also made the CMake file link the libs miniaudio needs

--- a/CMakeLists.txt

+++ b/CMakeLists.txt

@@ -364,6 +364,21 @@

 	target_sources(CSE2 PRIVATE "src/Backends/Audio/SDL2.cpp")

 elseif(AUDIO_BACKEND MATCHES "miniaudio")

 	target_sources(CSE2 PRIVATE "src/Backends/Audio/miniaudio.cpp")

+

+	# Link libdl, libm, and libpthread

+	include(CheckLibraryExists)

+

+	check_library_exists(m pow "" LIBM)

+	if(LIBM)

+		target_link_libraries(CSE2 PRIVATE m)

+	endif()

+

+	check_library_exists(pthread pthread_create "" LIBPTHREAD)

+	if(LIBPTHREAD)

+		target_link_libraries(CSE2 PRIVATE pthread)

+	endif()

+

+	target_link_libraries(CSE2 PRIVATE ${CMAKE_DL_LIBS})

 else()

 	message(FATAL_ERROR "Invalid AUDIO_BACKEND selected")

 endif()

--- a/Makefile

+++ b/Makefile

@@ -167,8 +167,7 @@

   src/Star.cpp \

   src/TextScr.cpp \

   src/Triangle.cpp \

-  src/ValueView.cpp \

-  src/Backends/Audio/SDL2.cpp

+  src/ValueView.cpp

 RESOURCES = \

   BITMAP/Credit01.bmp \

@@ -269,6 +268,15 @@

   SOURCES += src/Backends/Rendering/Software.cpp

 else

   $(error Invalid RENDERER selected)

+endif

+

+ifeq ($(AUDIO_BACKEND), SDL2)

+  SOURCES += src/Backends/Audio/SDL2.cpp

+else ifeq ($(AUDIO_BACKEND), miniaudio)

+  SOURCES += src/Backends/Audio/miniaudio.cpp

+  CSE2_LIBS += -ldl -lm -lpthread

+else

+  $(error Invalid AUDIO_BACKEND selected)

 endif

 OBJECTS = $(addprefix obj/$(FILENAME)/, $(addsuffix .o, $(SOURCES)))