On Mac, we don't want to run /sbin/ldconfig as it doesn't exist

Signed-off-by: Ian Johnson <ijohnson@wolfram.com>

lib/CMakeLists.txt

@@ -90,6 +90,7 @@ set_target_properties(libmosquitto PROPERTIES
 install(TARGETS libmosquitto RUNTIME DESTINATION ${BINDIR} LIBRARY DESTINATION ${LIBDIR})
 install(FILES mosquitto.h DESTINATION ${INCLUDEDIR})
 
-if (UNIX)
+if (UNIX AND NOT APPLE)
 	install(CODE "EXEC_PROGRAM(/sbin/ldconfig)")
-endif (UNIX)
+endif (UNIX AND NOT APPLE)
+

lib/cpp/CMakeLists.txt

@@ -13,6 +13,7 @@ set_target_properties(mosquittopp PROPERTIES
 install(TARGETS mosquittopp RUNTIME DESTINATION ${BINDIR} LIBRARY DESTINATION ${LIBDIR})
 install(FILES mosquittopp.h DESTINATION ${INCLUDEDIR})
 
-if (UNIX)
+if (UNIX AND NOT APPLE)
 	install(CODE "EXEC_PROGRAM(/sbin/ldconfig)")
-endif (UNIX)
+endif (UNIX AND NOT APPLE)
+

src/CMakeLists.txt

@@ -154,7 +154,8 @@ if (${WITH_TLS} STREQUAL ON)
 	install(TARGETS mosquitto_passwd RUNTIME DESTINATION ${BINDIR} LIBRARY DESTINATION ${LIBDIR})
 endif (${WITH_TLS} STREQUAL ON)
 
-if (UNIX)
+if (UNIX AND NOT APPLE)
 	install(CODE "EXEC_PROGRAM(/sbin/ldconfig)")
-endif (UNIX)
+endif (UNIX AND NOT APPLE)
+