+##### Sound configuration #####
+
+ifndef DP_SOUND_API
+ DP_SOUND_API=$(DEFAULT_SNDAPI)
+endif
+
+# NULL: no sound
+ifeq ($(DP_SOUND_API), NULL)
+ OBJ_SOUND=$(OBJ_SND_NULL)
+ LIB_SOUND=$(LIB_SND_NULL)
+endif
+
+# OSS: Open Sound System
+ifeq ($(DP_SOUND_API), OSS)
+ OBJ_SOUND=$(OBJ_SND_OSS)
+ LIB_SOUND=$(LIB_SND_OSS)
+endif
+
+# ALSA: Advanced Linux Sound Architecture
+ifeq ($(DP_SOUND_API), ALSA)
+ OBJ_SOUND=$(OBJ_SND_ALSA)
+ LIB_SOUND=$(LIB_SND_ALSA)
+endif
+
+# COREAUDIO: Core Audio
+ifeq ($(DP_SOUND_API), COREAUDIO)
+ OBJ_SOUND=$(OBJ_SND_COREAUDIO)
+ LIB_SOUND=$(LIB_SND_COREAUDIO)
+endif
+
+# BSD: BSD / Sun audio API
+ifeq ($(DP_SOUND_API), BSD)
+ OBJ_SOUND=$(OBJ_SND_BSD)
+ LIB_SOUND=$(LIB_SND_BSD)
+endif
+
+# WIN: DirectX and Win32 WAVE output
+ifeq ($(DP_SOUND_API), WIN)
+ OBJ_SOUND=$(OBJ_SND_WIN)
+ LIB_SOUND=$(LIB_SND_WIN)
+endif
+
+ifeq ($(DP_SOUND_API),3DRAS)
+ OBJ_SOUND=$(OBJ_SND_3DRAS)
+ LIB_SOUND=$(LIB_SND_3DRAS)
+endif
+
+##### Extra CFLAGS #####
+
+CFLAGS_MAKEDEP?=-MMD
+ifdef DP_FS_BASEDIR
+ CFLAGS_FS=-DDP_FS_BASEDIR=\"$(DP_FS_BASEDIR)\"
+else
+ CFLAGS_FS=
+endif
+
+CFLAGS_PRELOAD=
+ifneq ($(DP_MAKE_TARGET), mingw)
+ifdef DP_PRELOAD_DEPENDENCIES
+# DP_PRELOAD_DEPENDENCIES: when set, link against the libraries needed using -l
+# dynamically so they won't get loaded at runtime using dlopen
+ LDFLAGS_CL+=$(LDFLAGS_UNIXCL_PRELOAD)
+ LDFLAGS_SV+=$(LDFLAGS_UNIXSV_PRELOAD)
+ LDFLAGS_SDL+=$(LDFLAGS_UNIXSDL_PRELOAD)
+ CFLAGS_PRELOAD=$(CFLAGS_UNIX_PRELOAD)
+endif
+endif
+
+CFLAGS_NET=
+# Systems without IPv6 support should uncomment this:
+#CFLAGS_NET+=-DNOSUPPORTIPV6