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='2023-07-19 10:38:15 -0400'>2023-07-19</span></td><td><a href='/guix/commit/gnu/tests?id=1d837aaa32a3a2de8f4a1ac391f92effba50834e'>tests: lightdm: Bump timeout waiting for screen text to 60 seconds.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is to avoid non-deterministic failures on slower machines.

* gnu/tests/lightdm.scm (run-lightdm-test) &lt;wait-for-screen-text&gt;: Bump
timeout to 60 s (from the default 30 s).
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-07-19 10:38:15 -0400'>2023-07-19</span></td><td><a href='/guix/commit/gnu/tests?id=1edbadc6b49adda050a87057e6501c961888d7bb'>tests: xvnc: Fix 'gdm auto-suspend is disabled' test.</a><span class='msg-avail'>...<span class='msg-tooltip'>This failure is another collateral from commit a09c7da ("tests: Fork and exec
a new Guile for the marionette REPL."), which isolated the marionette
evaluation environment from that of the host.

* gnu/tests/vnc.scm (run-xvnc-test): Move the (guix build utils) import to...
["gdm auto-suspend is disabled"]: ... inside the marionette-eval of this
test.  Complete comment.

Reported-by: Bruno Victal &lt;mirai@makinata.eu&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2023-07-19 10:38:15 -0400'>2023-07-19</span></td><td><a href='/guix/commit/gnu/tests?id=95424292993551854fb7373cef997fd39340ea4b'>tests: xvnc: Group up GDM test and use GNU Ocrad instead of Tesseract.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/tests/vnc.scm (run-xvnc-test): Group up GDM test.  Use GNU Ocrad.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
Modified-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Bruno Victal</td></tr>
<tr><td><span title='2023-07-19 10:38:15 -0400'>2023-07-19</span></td><td><a href='/guix/commit/gnu/tests?id=ab2abe16debaae362ea04f32d66332423d2dba1b'>tests: gdm: Prefer OCR to delay.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/tests/gdm.scm (run-gdm-test): Use wait-for-screen-text instead of sleep.

Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
Modified-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Bruno Victal</td></tr>