918170c721d7af45509d4e3328dd6d9e6e904155
hiram
  Fri Aug 30 15:33:42 2013 -0700
no librt on Mac OSX compile refs #11616
diff --git src/inc/common.mk src/inc/common.mk
index 3b5443e..1e149f9 100644
--- src/inc/common.mk
+++ src/inc/common.mk
@@ -121,32 +121,37 @@
 endif
 ifeq (${MYSQLLIBS},)
   ifneq ($(wildcard /opt/local/lib/mysql55/mysql/libmysqlclient.a),)
       MYSQLLIBS=/opt/local/lib/mysql55/mysql/libmysqlclient.a
   endif
 endif
 ifeq ($(findstring src/hg/,${CURDIR}),src/hg/)
   ifeq (${MYSQLINC},)
     $(error can not find installed mysql development system)
   endif
 endif
 # last resort, hoping the compiler can find it in standard locations
 ifeq (${MYSQLLIBS},)
   MYSQLLIBS="-lmysqlclient"
 endif
-# OK to add this to all MYSQLLIBS just in case it is MySQL version 5.6 libraries
+# OK to add -lstdc++ to all MYSQLLIBS just in case it is
+#    MySQL version 5.6 libraries, but no 'librt' on Mac OSX
+ifeq ($(UNAME_S),Darwin)
+  MYSQLLIBS += -lstdc++
+else
   MYSQLLIBS += -lstdc++ -lrt
+endif
 
 L+=${PNGLIB}
 HG_INC+=${PNGINCL}
 
 # 32-bit color enabled by default
 ifneq (${COLOR32},0)
     HG_DEFS+=-DCOLOR32
 endif
 
 # autodetect UCSC installation of samtabix:
 ifeq (${SAMTABIXDIR},)
     SAMTABIXDIR = /hive/data/outside/samtabix/${MACHTYPE}
     ifneq ($(wildcard ${SAMTABIXDIR}),)
         ifeq (${USE_SAMTABIX},)
           USE_SAMTABIX=1