diff -ur djview-4.12.0.orig/src/tiff2pdf.c djview-4.12.0/src/tiff2pdf.c

--- djview-4.12.0.orig/src/tiff2pdf.c	2021-03-28 14:50:19.525196539 -0400

+++ djview-4.12.0/src/tiff2pdf.c	2021-03-28 14:50:37.968293526 -0400

@@ -645,11 +645,7 @@

 { 

 	T2P *t2p = (T2P*) handle;

 	if (t2p->outputdisable <= 0 && t2p->outputfile) {

-#if HAVE_FSEEKO

-        return fseeko(t2p->outputfile, (off_t) offset, whence);

-#else            

         return fseek(t2p->outputfile, (long) offset, whence);

-#endif

     }

 	return offset;

 }

Only in djview-4.12.0/src: tiff2pdf.c~