CLEANUP: remove THREAD_LOCAL from config.h

This one really ought to be defined in hathreads.h like all other thread
definitions, which is what this patch does. As expected, all files but
one (regex.h) were already including hathreads.h when using THREAD_LOCAL;
regex.h was fixed for this.

This was the last entry in config.h which is now useless.

include/common/config.h

@@ -26,10 +26,4 @@
 #include <common/compat.h>
 #include <common/defaults.h>
 
-#ifdef USE_THREAD
-#define THREAD_LOCAL __thread
-#else
-#define THREAD_LOCAL
-#endif
-
 #endif /* _COMMON_CONFIG_H */

include/common/hathreads.h

@@ -44,6 +44,7 @@
 
 #ifndef USE_THREAD
 
+#define THREAD_LOCAL  /* empty */
 #define MAX_THREADS 1
 #define MAX_THREADS_MASK 1
 
@@ -258,6 +259,8 @@ static inline unsigned long thread_isolated()
 #include <pthread.h>
 #include <import/plock.h>
 
+#define THREAD_LOCAL __thread
+
 #ifndef MAX_THREADS
 #define MAX_THREADS LONGBITS
 #endif

include/common/regex.h

@@ -26,6 +26,7 @@
 #include <string.h>
 
 #include <common/config.h>
+#include <common/hathreads.h>
 
 #ifdef USE_PCRE
 #include <pcre.h>