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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<div class='path'>path: <a href='/guix/log/?id=91eac97929cce55619d4fd852bf86d86d13f3f9d'>root</a>/<a href='/guix/log/NEWS?id=91eac97929cce55619d4fd852bf86d86d13f3f9d'>NEWS</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/NEWS?id=91eac97929cce55619d4fd852bf86d86d13f3f9d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-03-28 20:13:59 -0400'>2023-03-28</span></td><td><a href='/guix/commit/NEWS?id=c94a7d41c76f520e56a1304bd7fb3cbf3579fc52'>NEWS: Mention new rpm format.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS (Package management): Mention new rpm format.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-12-18 01:17:15 +0100'>2022-12-18</span></td><td><a href='/guix/commit/NEWS?id=a8f9579348aae58b68b25004cfd28aa7407db802'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-17 19:15:50 +0100'>2022-12-17</span></td><td><a href='/guix/commit/NEWS?id=239bfe2ec1fa3b4305500211e6cade6e4bda2a62'>Update NEWS.</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-12-02 23:20:54 +0100'>2022-12-02</span></td><td><a href='/guix/commit/NEWS?id=7ef490e3fc94e0b9025c98797fc014f07e21c4cc'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-11-23 17:22:11 +0100'>2022-11-23</span></td><td><a href='/guix/commit/NEWS?id=7a2082023ad9c7479bfedf39537606a088222d48'>NEWS: Update it.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Shepherd is already at 0.9.3 now.
</span></span></td><td>Jonathan Brielmaier</td></tr>
<tr><td><span title='2022-11-16 14:28:09 -0500'>2022-11-16</span></td><td><a href='/guix/commit/NEWS?id=e06df550e21d596b65dc3e5b3e99152be58372b3'>Update NEWS.</a></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-10-13 10:49:19 +0200'>2022-10-13</span></td><td><a href='/guix/commit/NEWS?id=d2ca9334a304ab5837b62968b77bbbab34af7afe'>NEWS: Update it.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Add an entry about 'guix shell' --emulate-fhs option.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-10-07 10:11:13 -0400'>2022-10-07</span></td><td><a href='/guix/commit/NEWS?id=6e3dab4737832a78de07dd805a4057eb5f4cfcf3'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Add new entry for installation script improvements.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-28 09:06:10 +0200'>2022-09-28</span></td><td><a href='/guix/commit/NEWS?id=70a593242e6b288a0348154f09c4ddbc732463d8'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Add new services for the 1.4.0.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-09-26 09:47:10 +0200'>2022-09-26</span></td><td><a href='/guix/commit/NEWS?id=4b551518d0a14a6ac1655bde3d23f6d189f49490'>NEWS: Update it.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Add an entry about WSL images.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-09-24 18:08:05 +0200'>2022-09-24</span></td><td><a href='/guix/commit/NEWS?id=b814bdf441bf8863b3b6bd846c21f23c2ac2d511'>Update NEWS.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-09-23 00:50:17 -0400'>2022-09-23</span></td><td><a href='/guix/commit/NEWS?id=a57c4eff6bbdcff79294fa15ecb95ab2b3c55bb4'>Update NEWS.</a></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-19 09:06:47 +0200'>2022-09-19</span></td><td><a href='/guix/commit/NEWS?id=41b30f40beb74f8d45cff167a8b62b8f88cf26c4'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>* NEWS: Mention Shepherd 0.9.2 upgrade.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-09-16 10:01:56 +0200'>2022-09-16</span></td><td><a href='/guix/commit/NEWS?id=c0d25bef71af32dfb98e93ddcb82d0003c8714f8'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>Entries extracted from:
        git log 3eadcdc63..version-1.4.0

* NEWS: Update entries for v1.4.0
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2022-09-15 16:57:39 -0400'>2022-09-15</span></td><td><a href='/guix/commit/NEWS?id=011dab59d80690d20875d43e73c3cfd8af95af99'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>This covers the commits made between v1.3.0..3eadcdc6^.

* NEWS: New entries for the 1.4.0 upcoming release.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2022-09-14 23:57:56 -0400'>2022-09-14</span></td><td><a href='/guix/commit/NEWS?id=839950c4a9925bf3d7108cb8533be37b185fb8bd'>Update NEWS.</a><span class='msg-avail'>...<span class='msg-tooltip'>These news were extracted from the output of:

   git log --reverse v1.3.0..03eb0b1be2cfedd0d9a66fef0edc53a17f7653a5.

* NEWS: Update entries for v1.4.0.
</span></span></td><td>Maxim Cournoyer</td></tr>