X-Git-Url: http://git.kpe.io/?a=blobdiff_plain;f=configure.ac;h=93d7a8f07b70817333e766db1a63b99be2f3e483;hb=6af85c4a513272dc17a3d1fcbf8de325ddea0016;hp=d13290cce893207a39161816ff089b833a8c502b;hpb=294a10772740d04c66b2ea9284a6d7e243e55c99;p=ctsim.git

diff --git a/configure.ac b/configure.ac
index d13290c..93d7a8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,7 @@ AC_CHECK_LIB(GL, main, [libgl=true], [libgl=false], [-L/usr/X11R6/lib -lXt -lXex
 AC_CHECK_LIB(pthread, main, [pthread=true], [pthread=false])
 
 if test "$zlib" = "true" ; then
-  AC_CHECK_LIB(png, main, [png=true ; AC_DEFINE(HAVE_PNG,1,[PNG library])], [png=false])
+  AC_CHECK_LIB(png, main, [png=true ; AC_DEFINE(HAVE_PNG,1,[PNG library])], [png=false], [-lz -lm])
 fi
 
 dnl Checks for header files.