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============ Checking for PNG support ============

#include <png.h>
#include <string.h>
int main(void) {
  printf("png.h : %s\n", PNG_LIBPNG_VER_STRING);
  printf("libpng: %s\n", png_libpng_ver);
  return (strcmp(PNG_LIBPNG_VER_STRING, png_libpng_ver));
}

cc -O2 -march=pentium4 -fomit-frame-pointer    -o /tmp/mplayer-conf-25206-10150.o /tmp/mplayer-conf-26828-10150.c -lpng -lz -lm

ldd /tmp/mplayer-conf-25206-10150.o
	linux-gate.so.1 =>  (0xffffe000)
	libpng.so.3 => /usr/local/mono-1.1.18/lib/libpng.so.3 (0xb7f1e000)
	libz.so.1 => /usr/local/mono-1.1.18/lib/libz.so.1 (0xb7f10000)
	libm.so.6 => /lib/tls/libm.so.6 (0xb7edc000)
	libc.so.6 => /lib/tls/libc.so.6 (0xb7dad000)
	/lib/ld-linux.so.2 (0xb7f42000)

png.h : 1.2.12
libpng: 1.2.2
Result is: no (mismatch of library and header versions)