diff --git a/hadoop-common-project/hadoop-common/CHANGES.txt b/hadoop-common-project/hadoop-common/CHANGES.txt
index 2feb143633d..a3b89512117 100644
--- a/hadoop-common-project/hadoop-common/CHANGES.txt
+++ b/hadoop-common-project/hadoop-common/CHANGES.txt
@@ -45,6 +45,9 @@ Release 2.0.4-beta - UNRELEASED
     HADOOP-9267. hadoop -help, -h, --help should show usage instructions.
     (Andrew Wang via atm)
 
+    HADOOP-8569. CMakeLists.txt: define _GNU_SOURCE and _LARGEFILE_SOURCE.
+    (Colin Patrick McCabe via atm)
+
 Release 2.0.3-alpha - 2013-02-06 
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-common-project/hadoop-common/src/CMakeLists.txt b/hadoop-common-project/hadoop-common/src/CMakeLists.txt
index c7f05e5c3bc..051337e2e2d 100644
--- a/hadoop-common-project/hadoop-common/src/CMakeLists.txt
+++ b/hadoop-common-project/hadoop-common/src/CMakeLists.txt
@@ -90,7 +90,8 @@ find_package(ZLIB REQUIRED)
 SET(CMAKE_FIND_LIBRARY_SUFFIXES STORED_CMAKE_FIND_LIBRARY_SUFFIXES)
 
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -Wall -O2")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_REENTRANT -D_FILE_OFFSET_BITS=64")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_REENTRANT -D_GNU_SOURCE")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64")
 set(D main/native/src/org/apache/hadoop)
 set(T main/native/src/test/org/apache/hadoop)
 
diff --git a/hadoop-hdfs-project/hadoop-hdfs/src/CMakeLists.txt b/hadoop-hdfs-project/hadoop-hdfs/src/CMakeLists.txt
index d0b3c060194..7b1f1b2175e 100644
--- a/hadoop-hdfs-project/hadoop-hdfs/src/CMakeLists.txt
+++ b/hadoop-hdfs-project/hadoop-hdfs/src/CMakeLists.txt
@@ -68,8 +68,9 @@ if (NOT GENERATED_JAVAH)
     MESSAGE(FATAL_ERROR "You must set the CMake variable GENERATED_JAVAH")
 endif (NOT GENERATED_JAVAH)
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -Wall -O2 -D_GNU_SOURCE")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_REENTRANT -D_FILE_OFFSET_BITS=64")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -Wall -O2")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_REENTRANT -D_GNU_SOURCE")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64")
 
 include_directories(
     ${GENERATED_JAVAH}
diff --git a/hadoop-tools/hadoop-pipes/src/CMakeLists.txt b/hadoop-tools/hadoop-pipes/src/CMakeLists.txt
index a1ee97daefc..72c1836c80f 100644
--- a/hadoop-tools/hadoop-pipes/src/CMakeLists.txt
+++ b/hadoop-tools/hadoop-pipes/src/CMakeLists.txt
@@ -21,10 +21,10 @@ find_package(OpenSSL REQUIRED)
 
 set(CMAKE_BUILD_TYPE, Release)
 
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -g -Wall -O2")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g -Wall -O2")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_REENTRANT -D_FILE_OFFSET_BITS=64")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_REENTRANT -D_FILE_OFFSET_BITS=64")
+set(PIPES_FLAGS "-g -Wall -O2 -D_REENTRANT -D_GNU_SOURCE")
+set(PIPES_FLAGS "${PIPES_FLAGS} -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64")
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${PIPES_FLAGS}")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${PIPES_FLAGS}")
 
 include(../../../hadoop-common-project/hadoop-common/src/JNIFlags.cmake NO_POLICY_SCOPE)