start using jemalloc

cmake/jemalloc.cmake

@@ -0,0 +1,33 @@
+INCLUDE(ExternalProject)
+
+MACRO (USE_BUNDLED_JEMALLOC)
+  SET(SOURCE_DIR "${CMAKE_SOURCE_DIR}/extra/jemalloc")
+  SET(BINARY_DIR "${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/extra/jemalloc/build")
+  SET(LIBJEMALLOC "${BINARY_DIR}/lib/libjemalloc_pic.a")
+  SET(JEMALLOC_CONFIGURE_OPTS "CC=${CMAKE_C_COMPILER}" "--with-private-namespace=jemalloc_internal_" "--enable-cc-silence")
+  IF (CMAKE_BUILD_TYPE MATCHES "Debug" AND NOT APPLE) # see the comment in CMakeLists.txt
+    LIST(APPEND JEMALLOC_CONFIGURE_OPTS --enable-debug)
+  ENDIF()
+  ExternalProject_Add(jemalloc
+    PREFIX extra/jemalloc
+    SOURCE_DIR ${SOURCE_DIR}
+    BINARY_DIR ${BINARY_DIR}
+    STAMP_DIR  ${SOURCE_DIR}
+    CONFIGURE_COMMAND "${SOURCE_DIR}/configure" ${JEMALLOC_CONFIGURE_OPTS}
+    BUILD_COMMAND ${CMAKE_MAKE_PROGRAM} "build_lib_static"
+    INSTALL_COMMAND ""
+  )
+  ADD_LIBRARY(libjemalloc STATIC IMPORTED)
+  SET_TARGET_PROPERTIES(libjemalloc PROPERTIES IMPORTED_LOCATION ${LIBJEMALLOC})
+  ADD_DEPENDENCIES(libjemalloc jemalloc)
+ENDMACRO()
+
+SET(WITH_JEMALLOC "yes" CACHE STRING
+    "Which jemalloc to use (possible values are 'no', 'bundled', 'yes' (same as bundled)")
+#"Which jemalloc to use (possible values are 'no', 'bundled', 'system', 'yes' (system if possible, otherwise bundled)")
+
+MACRO (CHECK_JEMALLOC)
+  IF(WITH_JEMALLOC STREQUAL "bundled" OR WITH_JEMALLOC STREQUAL "yes")
+    USE_BUNDLED_JEMALLOC()
+  ENDIF()
+ENDMACRO()