To avoid dependency on libtool/libltdl, change "*.la" extension to "*.so".
This also changes the path for the *.so files necessary for testing to the
correct location.
This patch comes from in-house.  It has not been submitted upstream; plans
unclear.

diff -wpruN --no-dereference '--exclude=*.orig' a~/MagickCore/module.c a/MagickCore/module.c
--- a~/MagickCore/module.c	1970-01-01 00:00:00
+++ a/MagickCore/module.c	1970-01-01 00:00:00
@@ -77,7 +77,7 @@ typedef void *ModuleHandle;
   Define declarations.
 */
 #if defined(MAGICKCORE_LTDL_DELEGATE)
-#  define ModuleGlobExpression "*.la"
+#  define ModuleGlobExpression "*.so"
 #else
 #  if defined(_DEBUG)
 #    define ModuleGlobExpression "IM_MOD_DB_*.dll"
@@ -1473,7 +1473,7 @@ static void TagToCoderModuleName(const c
   if (IsEventLogging() != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",tag);
 #if defined(MAGICKCORE_LTDL_DELEGATE)
-  (void) FormatLocaleString(name,MagickPathExtent,"%s.la",tag);
+  (void) FormatLocaleString(name,MagickPathExtent,"%s.so",tag);
   (void) LocaleLower(name);
 #else
 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
@@ -1527,7 +1527,7 @@ static void TagToFilterModuleName(const
 #elif !defined(MAGICKCORE_LTDL_DELEGATE)
   (void) FormatLocaleString(name,MagickPathExtent,"%s.dll",tag);
 #else
-  (void) FormatLocaleString(name,MagickPathExtent,"%s.la",tag);
+  (void) FormatLocaleString(name,MagickPathExtent,"%s.so",tag);
 #endif
 }
 
diff -wpruN --no-dereference '--exclude=*.orig' a~/common.shi.in a/common.shi.in
--- a~/common.shi.in	1970-01-01 00:00:00
+++ a/common.shi.in	1970-01-01 00:00:00
@@ -19,9 +19,9 @@ VALIDATE="@abs_top_builddir@/tests/valid
 DRAWTEST="@abs_top_builddir@/tests/drawtest"
 WANDTEST="@abs_top_builddir@/tests/wandtest"
 LD_LIBRARY_PATH="@abs_top_builddir@/MagickCore/.libs:@abs_top_builddir@/MagickWand/.libs:${LD_LIBRARY_PATH}"
-MAGICK_CODER_MODULE_PATH="@abs_top_builddir@/coders"
+MAGICK_CODER_MODULE_PATH="@abs_top_builddir@/coders/.libs"
 MAGICK_CONFIGURE_PATH="@abs_top_builddir@/config:@abs_top_srcdir@/config"
-MAGICK_FILTER_MODULE_PATH="@abs_top_builddir@/filters"
+MAGICK_FILTER_MODULE_PATH="@abs_top_builddir@/filters/.libs"
 MAGICK_FONT="@abs_top_srcdir@/PerlMagick/demo/Generic.ttf"
 PATH="@abs_top_builddir@/utilities:@abs_top_builddir@/tests:${PATH}"
 set +a