Issue: TORCS won't link libpng on Ubuntu 13.10

Hi,I have spent days trying to work out what causes this problem, but I haven't been successful. Hence, I am turning to you.I am trying to build TORCS 1.3.5. on Ubuntu 13.10, but I keep getting the errors "undefined reference to png_*":g++ main.o linuxspec.o -L/home/reinis/FYP_Surrey/TORCS_source/torcs-1.3.5/export/lib -lopenal -lalut -lvorbisfile -L/usr/lib -L/usr/local/lib -lracescreens -lrobottools -lclient -lconfscreens -ltgf -ltgfclient -ltxml -lplibul -lraceengine -lmusicplayer -llearning -lplibjs -lplibssgaux -lplibssg -lplibsm -lplibsl -lplibsg -lplibul -lglut -lGLU -lGL -lpng -lz -ldl -lXrandr -lXrender -lXxf86vm -lXmu -lXi -lXt -lSM -lICE -lXext -lX11 -lm -o torcs-bin/home/reinis/FYP_Surrey/TORCS_source/torcs-1.3.5/export/lib/libtgfclient.so: undefined reference to `png_get_valid'/home/reinis/FYP_Surrey/TORCS_source/torcs-1.3.5/export/lib/libtgfclient.so: undefined reference to `png_create_info_struct'...The error suggests the linker can't find the actual library, but the configuration (./configure) did not complain and I have written an example program that uses these functions, which builds fine with the command "gcc png_test.o -o png_test -lpng"Has anyone experienced a similar issue and can provide a solution to it? Help will be much appreciated.Thanks,Tom

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