---- HDF4.2r4/configure.ac.orig 2009-01-13 22:13:49.000000000 +0100
-+++ HDF4.2r4/configure.ac 2009-04-23 23:36:13.513713807 +0200
-@@ -190,12 +190,6 @@
+--- hdf-4.2.15/configure.ac.orig 2020-03-03 18:40:50.000000000 +0100
++++ hdf-4.2.15/configure.ac 2020-11-12 21:00:42.794377396 +0100
+@@ -294,12 +294,6 @@
enable_shared="no"
fi
-fi
-
AC_PROG_INSTALL
- AM_PROG_LEX
- AC_PROG_INSTALL
+ AC_PROG_LN_S
+
---- hdf-4.2.10/configure.ac.orig 2014-12-06 11:14:27.307342175 +0100
-+++ hdf-4.2.10/configure.ac 2014-12-06 11:38:58.803947089 +0100
-@@ -466,7 +466,7 @@
- yes)
+--- hdf-4.2.15/configure.ac.orig 2020-11-12 21:00:56.401745032 +0100
++++ hdf-4.2.15/configure.ac 2020-11-12 21:04:32.302866945 +0100
+@@ -533,7 +533,7 @@
+ X-yes)
HAVE_SZIP="yes"
AC_CHECK_HEADERS([szlib.h], [HAVE_SZLIB_H="yes"], [unset HAVE_SZIP])
- if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then