fix for -fno-common
https://gitweb.gentoo.org/repo/gentoo.git/commit/media-sound/scmpc/files?id=c9f42ac8feb314f3f2f6ec7cfd8c535ff33fe735

Index: src/preferences.c
--- src/preferences.c.orig
+++ src/preferences.c
@@ -36,6 +36,8 @@
 #include "scmpc.h"
 #include "preferences.h"
 
+struct prefs_t prefs;
+
 static gint cf_log_level(cfg_t *cfg, cfg_opt_t *opt, const gchar *value,
 		void *result);
 static gint cf_validate_num(cfg_t *cfg, cfg_opt_t *opt);
@@ -180,7 +182,7 @@ static gboolean parse_config_file(void)
 				&cf_log_level),
 		CFG_STR("log_file", "/var/log/scmpc.log", CFGF_NONE),
 		CFG_STR("pid_file", "/var/run/scmpc.pid", CFGF_NONE),
-		CFG_STR("cache_file", "/var/lib/scmpc/scmpc.cache", CFGF_NONE),
+		CFG_STR("cache_file", "/var/scmpc/scmpc.cache", CFGF_NONE),
 		CFG_INT("queue_length", 500, CFGF_NONE),
 		CFG_INT("cache_interval", 10, CFGF_NONE),
 		CFG_SEC("mpd", mpd_opts, CFGF_NONE),