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--- pnm/pnmtopng.c.orig Sun Jul 22 12:32:22 2001
+++ pnm/pnmtopng.c Sat Dec 8 00:00:00 2001
@@ -1441,8 +1441,13 @@
fprintf(stderr,"pnmtopng version %s.\n", VERSION);
fprintf(stderr, " Compiled with libpng %s; using libpng %s.\n",
PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#ifdef zlib_version
fprintf(stderr, " Compiled with zlib %s; using zlib %s.\n",
ZLIB_VERSION, zlib_version);
+#else
+ fprintf(stderr, " Compiled with zlib %s.\n",
+ ZLIB_VERSION);
+#endif
fprintf(stderr,
" Compiled with %d-bit netpbm support (PPM_OVERALLMAXVAL = %d).\n",
pm_maxvaltobits (PPM_OVERALLMAXVAL), PPM_OVERALLMAXVAL);
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