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=2b65a9e6d18c661f5bb6b3e557973c52b3294e87'>root</a>/<a href='/guix/log/gnu?id=2b65a9e6d18c661f5bb6b3e557973c52b3294e87'>gnu</a>/<a href='/guix/log/gnu/packages?id=2b65a9e6d18c661f5bb6b3e557973c52b3294e87'>packages</a>/<a href='/guix/log/gnu/packages/patches?id=2b65a9e6d18c661f5bb6b3e557973c52b3294e87'>patches</a>/<a href='/guix/log/gnu/packages/patches/java-xerces-bootclasspath.patch?id=2b65a9e6d18c661f5bb6b3e557973c52b3294e87'>java-xerces-bootclasspath.patch</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/gnu/packages/patches/java-xerces-bootclasspath.patch?id=2b65a9e6d18c661f5bb6b3e557973c52b3294e87&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-02-10 19:04:04 +0100'>2018-02-10</span></td><td><a href='/guix/commit/gnu/packages/patches/java-xerces-bootclasspath.patch?id=6d0368eb842f4b5b8a65209569a21c07b378b397'>gnu: Add java-xerces.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/java.scm (java-xerces): New variable.
* gnu/packages/patches/java-xerces-bootclasspath.patch: New file.
* gnu/packages/patches/java-xerces-build_dont_unzip.patch: New file.
* gnu/packages/patches/java-xerces-xjavac_taskdef.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add them.
</span></span></td><td>Julien Lepiller</td></tr>