Changes necessary for shared library linking to succeed.

diff --git a/src/Makefile.in b/src/Makefile.in
index 9534473..12411bf 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -73,7 +73,7 @@ LTCOMPILE = $(LIBTOOL) --mode=compile --tag=CC $(CC) $(DEFS) \
 	$(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) \
 	$(AM_CFLAGS) $(CFLAGS)
 CCLD = $(CC)
-LINK = $(LIBTOOL) --mode=link --tag=CC $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
+LINK = HDF4_USE_SHLIB=yes $(LIBTOOL) --mode=link --tag=CC $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
 	$(AM_LDFLAGS) $(LDFLAGS) -o $@
 SOURCES = $(libhdfeos_la_SOURCES)
 DIST_SOURCES = $(libhdfeos_la_SOURCES)
@@ -125,8 +125,6 @@ INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_SCRIPT = @INSTALL_SCRIPT@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
 
-# Set LDFLAGS to alow the HDF-EOS library to use extern variables from HDF4
-LDFLAGS = -Wl,-single_module
 LIBOBJS = @LIBOBJS@
 LIBS = @LIBS@
 LIBTOOL = @LIBTOOL@

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<tr><td><span title='2022-03-23 11:20:20 +0200'>2022-03-23</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=01647fc80c0a15610b5e1a944a91c6e8a7900619'>gnu: ed: Use cc-for-target.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ed.scm (ed)[arguments]: Replace hardcoded gcc with
cc-for-target.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-03-23 11:18:46 +0200'>2022-03-23</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=b77ec228af23ed267cd94efc0fd673b741c0d6da'>gnu: ed: Update to 1.18.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ed.scm (ed): Update to 1.18.
[arguments]: Remove trailing #t.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2021-12-13 17:48:25 +0100'>2021-12-13</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=8394619baceb118df92e355377fd543bb1aa501a'>gnu: Simplify package inputs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This commit was obtained by running:

  ./pre-inst-env guix style

without any additional argument.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-01-15 14:06:12 +0100'>2021-01-15</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=dcaa934c3db2c8a2ad7819566585ef4a8308ef23'>gnu: ed: Update to 1.17.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ed.scm (ed): Update to 1.17.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-05 23:36:06 +0100'>2020-03-05</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=4a50e983bade29792076975092fec60df5cca59d'>gnu: ed: Update to 1.16.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ed.scm (ed): Update to 1.16.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-01-07 11:59:04 +0200'>2019-01-07</span></td><td><a href='/guix/commit/gnu/packages/ed.scm?id=f478ff860545bcea474da96b4d7f7e8ac1602218'>gnu: ed: Update to 1.15.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/ed.scm (ed): Update to 1.15.
</span></span></td><td>Efraim Flashner</td></tr>