use -O0 when debug on

mk/vars.mk

@@ -138,7 +138,7 @@ ifneq ($(ADK_DEBUG),)
 ifeq ($(ADK_DEBUG_OPTS),y)
 TARGET_CFLAGS+=		-g3 -fno-omit-frame-pointer $(ADK_TARGET_CFLAGS_OPT)
 else
-TARGET_CFLAGS+=		-g3 -fno-omit-frame-pointer
+TARGET_CFLAGS+=		-O0 -g3 -fno-omit-frame-pointer
 endif
 else
 TARGET_CPPFLAGS+=	-DNDEBUG

package/ffmpeg/Makefile

@@ -100,7 +100,11 @@ $(eval $(call PKG_template,FFSERVER,ffserver,${PKG_VERSION}-${PKG_RELEASE},${PKG
 $(eval $(call PKG_template,FFPROBE,ffprobe,${PKG_VERSION}-${PKG_RELEASE},${PKG_DEPENDS},${PKGSD_FFPROBE},${PKGSC_FFPROBE}))
 #$(eval $(call PKG_template,FFPLAY,ffplay,${PKG_VERSION}-${PKG_RELEASE},${PKGSS_FFPLAY},${PKGSD_FFPLAY},${PKGSC_FFPLAY}))
 
+ifeq ($(ADK_DEBUG),y)
+TARGET_CFLAGS:=		$(subst O0,O2,$(TARGET_CFLAGS))
+else
 TARGET_CFLAGS:=		$(subst Os,O2,$(TARGET_CFLAGS))
+endif
 TARGET_CPPFLAGS+=	-D_POSIX_SOURCE -D_GNU_SOURCE
 
 ifeq ($(ADK_TARGET_CPU_WITH_MMX),y)