use NULL to load plugins from default plugin directory

src/charon/Makefile.am

@@ -106,7 +106,6 @@ INCLUDES = -I${linux_headers} -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/
 AM_CFLAGS = -rdynamic \
   -DIPSEC_DIR=\"${ipsecdir}\" \
   -DIPSEC_PIDDIR=\"${piddir}\" \
-  -DIPSEC_PLUGINDIR=\"${plugindir}\" \
   -DSTRONGSWAN_CONF=\"${strongswan_conf}\"
 charon_LDADD = $(top_builddir)/src/libstrongswan/libstrongswan.la -lpthread -lm $(DLLIB) $(SOCKLIB)
 

src/charon/daemon.c

@@ -491,7 +491,7 @@ static bool initialize(private_daemon_t *this, bool syslog, level_t levels[])
 	this->public.traps = trap_manager_create();
 
 	/* load plugins, further infrastructure may need it */
-	if (!lib->plugins->load(lib->plugins, IPSEC_PLUGINDIR,
+	if (!lib->plugins->load(lib->plugins, NULL,
 			lib->settings->get_str(lib->settings, "charon.load", PLUGINS)))
 	{
 		return FALSE;

src/charon/plugins/sql/Makefile.am

@@ -3,7 +3,6 @@ INCLUDES = -I$(top_srcdir)/src/libstrongswan -I$(top_srcdir)/src/charon
 
 AM_CFLAGS = -rdynamic \
   -DSTRONGSWAN_CONF=\"${strongswan_conf}\" \
-  -DIPSEC_PLUGINDIR=\"${plugindir}\" \
   -DPLUGINS=\""${libstrongswan_plugins}\""
 
 plugin_LTLIBRARIES = libstrongswan-sql.la

src/charon/plugins/sql/pool.c

@@ -634,7 +634,7 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "integrity check of pool failed\n");
 		exit(SS_RC_DAEMON_INTEGRITY);
 	}
-	if (!lib->plugins->load(lib->plugins, IPSEC_PLUGINDIR,
+	if (!lib->plugins->load(lib->plugins, NULL,
 			lib->settings->get_str(lib->settings, "pool.load", PLUGINS)))
 	{
 		exit(SS_RC_INITIALIZATION_FAILED);