Fix Hudson (Jenkins!) BUILD_ID check.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a6a3194a2ebf1daf5572233cd2830051e4a1685c..93ee8cfa5ee83d4301150f757db4bba75d125763 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ if(NOT CMAKE_BUILD_TYPE)
       FORCE)
 endif(NOT CMAKE_BUILD_TYPE)
 
-if($ENV{BUILD_ID})
+if(NOT "$ENV{BUILD_ID}" STREQUAL "")
        set(HUDSON_BUILD_ID $ENV{BUILD_ID})
        set(HUDSON_BUILD_NUMBER $ENV{BUILD_NUMBER})
        message(STATUS "running under Hudson, build-number is ${HUDSON_BUILD_NUMBER}")