1 files changed, 8 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5b55a5a..4e4f9bb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.2)
+cmake_minimum_required (VERSION 2.8)
 include(CheckFunctionExists)
 include(CheckIncludeFiles)
 
@@ -10,6 +10,13 @@ if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
         add_definitions(-DHAVE_ATTRIBUTE__BOUNDED__)
 endif()
 
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+        add_definitions(-D_DEFAULT_SOURCE)
+        add_definitions(-D_BSD_SOURCE)
+        add_definitions(-D_POSIX_SOURCE)
+        add_definitions(-D_GNU_SOURCE)
+endif()
+
 add_definitions(-DLIBRESSL_INTERNAL)
 add_definitions(-DOPENSSL_NO_HW_PADLOCK)
 add_definitions(-DOPENSSL_NO_ASM)