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cmake: Linux: define _GNU_SOURCE.

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Closes #4042
This commit is contained in:
Justin M. Keyes 2016-01-24 21:16:00 -05:00
parent e1d81178cc
commit b5f6f43095
1 changed files with 4 additions and 0 deletions
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4
CMakeLists.txt
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@ -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")