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=821aa687b439f509bec124f14e529d6da756132c'>root</a>/<a href='/guix/log/tests?id=821aa687b439f509bec124f14e529d6da756132c'>tests</a>/<a href='/guix/log/tests/size.scm?id=821aa687b439f509bec124f14e529d6da756132c'>size.scm</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/tests/size.scm?id=821aa687b439f509bec124f14e529d6da756132c&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-11-12 23:37:13 +0100'>2018-11-12</span></td><td><a href='/guix/commit/tests/size.scm?id=9ed86fe175c15c819d6d86681c8136ff6bc927c0'>tests: Add 'test-assertm' to (guix tests).</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/tests.scm (test-assertm): New macro.
* tests/gexp.scm (test-assertm): Remove.
* tests/profiles.scm (test-assertm): Remove.
* tests/challenge.scm (%store, test-assertm): Remove.
* tests/debug-link.scm (%store, test-assertm): Remove.
* tests/size.scm (%store, test-assertm): Remove.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2017-04-07 00:17:16 +0200'>2017-04-07</span></td><td><a href='/guix/commit/tests/size.scm?id=c923f831160ddbda21d8ea1f2df4670550f3e9d8'>size: Add test to multiple 'store-profile' arguments.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/size.scm ("store-profile with multiple items"): New test.
</span></span></td><td>Ludovic Courtès</td></tr>