CFLAGS="$CFLAGS $CFLAGS_VISIBILITY"
CXXFLAGS="$CXXFLAGS $CXXFLAGS_VISIBILITY"
+OBJCFLAGS="$OBJCFLAGS $CFLAGS_VISIBILITY"
+OBJCXXFLAGS="$OBJCXXFLAGS $CXXFLAGS_VISIBILITY"
SAMPLES_SUBDIRS="`echo $SAMPLES_SUBDIRS | tr -s ' ' | tr ' ' '\n' | sort | uniq | tr '\n' ' '| tr -d '\r'`"