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+2013-06-19  Frank Warmerdam  <warmerdam@google.com>
+
+	* src/pj_mutex.c, configure.in: Ensure that the core mutex lock
+	is created in recursive mode.  Results in -lpthread being required.
+
 2013-06-18  Frank Warmerdam  <warmerdam@google.com>
 
 	* src/PJ_healpix.c: rename sign() to pj_sign() and make it static.  No