LIBDL may be required regardless of plugins (e.g. v4l2)

configure.ac

@@ -649,14 +649,8 @@ AS_IF([test "${SYS}" = "mingw32"], [
   have_dynamic_objects="yes" #assume we can use shared objects
 ])
 
-test "${enable_shared}" = "no" && have_dynamic_objects=no
-
-AS_IF([test "${have_dynamic_objects}" != "no"], [
-  AC_DEFINE(HAVE_DYNAMIC_PLUGINS, 1,
-            [Define to 1 if dynamic plugins are supported.])
-], [
-  dnl Clear $LIBDL so as not to break linking
-  LIBDL=""
+AS_IF([test "${enable_shared}" = "no"], [
+  have_dynamic_objects=no
 ])
 AM_CONDITIONAL(HAVE_DYNAMIC_PLUGINS, [test "${have_dynamic_objects}" != "no"])
 

src/Makefile.am

@@ -171,6 +171,9 @@ AM_CPPFLAGS = $(INCICONV) $(IDN_CFLAGS) \
 	-DPKGDATADIR=\"$(vlcdatadir)\" \
 	-DPKGLIBDIR=\"$(vlclibdir)\"
 AM_CFLAGS = $(CFLAGS_libvlccore)
+if HAVE_DYNAMIC_PLUGINS
+AM_CPPFLAGS += -DHAVE_DYNAMIC_PLUGINS
+endif
 
 libvlccore_la_SOURCES = $(SOURCES_libvlc)
 libvlccore_la_LDFLAGS = \