+### We need iconv for unicode support (Qt4 frontend requires it too)
+AM_ICONV
+if test "$am_cv_func_iconv" = no; then
+ LYX_ERROR([Cannot find required library iconv])
+else
+ LIBS="$LIBS $LIBICONV"
+fi
+
+### check for compression support
+AC_CHECK_HEADERS(zlib.h,
+ [AC_CHECK_LIB(z, gzopen, [LIBS="$LIBS -lz"], LYX_LIB_ERROR(libz,zlib))],
+ [LYX_LIB_ERROR(zlib.h,zlib)])
+
+