diff '--color=auto' -urNd hdf-4.2.16-2/configure.ac hdf-4.2.16-2-enable-fortran-shared/configure.ac
--- hdf-4.2.16-2/configure.ac	2023-06-28 01:28:51.000000000 +1000
+++ hdf-4.2.16-2-enable-fortran-shared/configure.ac	2025-06-22 19:33:17.414279945 +1000
@@ -343,24 +343,6 @@
   AC_MSG_RESULT([no])
 fi
 
-## -------------------------------------------------------------------------
-## Build static libraries by default. Furthermore, fortran shared libraries
-## are unsupported. Disallow a user from enabling both shared libraries and
-## fortran.
-if test "X${enable_shared}" != "Xyes"; then
-    enable_shared="no"
-fi
-
-if test "X${enable_shared}" = "Xyes"; then
-    if test "X${BUILD_FORTRAN}" = "Xyes"; then
-        AC_MSG_ERROR([Cannot build shared fortran libraries. Please configure with --disable-fortran flag.])
-    fi
-fi
-
-AC_PROG_INSTALL
-AC_PROG_LN_S
-
-
 ## ----------------------------------------------------------------------
 ## Check which archiving tool to use. This needs to be done before
 ## the LT_INIT macro.
@@ -959,11 +941,6 @@
 ## ------------------------------------------------------------------------
 ## Check to see if libtool has enabled shared libraries. Set a conditional
 ## as some Makefiles will build based on availability of shared libraries.
-if (./libtool --features | grep '^enable shared libraries' > /dev/null); then
-  enable_shared=yes
-else
-  enable_shared=no
-fi
 
 ## ------------------------------------------------------------------------
 ## Specify shared library extension the host machine should recognize.