From b5f6f43095fc556cfc4b909bd810059f94967a68 Mon Sep 17 00:00:00 2001 From: "Justin M. Keyes" Date: Sun, 24 Jan 2016 21:16:00 -0500 Subject: [PATCH] cmake: Linux: define _GNU_SOURCE. Closes #4042 --- CMakeLists.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/CMakeLists.txt b/CMakeLists.txt index 6c3f4d927d..ed87dc30a2 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -254,6 +254,10 @@ if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_SYSTEM_NAME STREQUAL "Linux") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--no-undefined") set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--no-undefined") set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,--no-undefined") + + # For O_CLOEXEC, O_DIRECTORY, and O_NOFOLLOW flags on older systems + # (pre POSIX.1-2008: glibc 2.11 and earlier). #4042 + add_definitions(-D_GNU_SOURCE) endif() if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_SYSTEM_NAME STREQUAL "SunOS")