diff -r 4eab99ff2666 -r 0ab493e5250e CMakeLists.txt
--- a/CMakeLists.txt	Sun Dec 11 16:08:52 2011 +0100
+++ b/CMakeLists.txt	Sun Dec 11 18:43:33 2011 +0100
@@ -12,6 +12,10 @@
 SET(PROJECT_VERSION "hg-tip"
     CACHE STRING "${PROJECT_NAME} version string")
 
+GET_FILENAME_COMPONENT(BUILD_DIR_NAME ${CMAKE_BINARY_DIR} NAME)
+
+SET(BENCHMARK_BUILD_ID ${BUILD_DIR_NAME} CACHE STRING "Benchmark build id")
+
 ## Do not edit this.
 PROJECT(${PROJECT_NAME})