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cmake: do not bind to any particular POSIX C standard

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This caused build failures on FreeBSD. Defining _POSIX_C_SOURCE to
a particular version will disable common non-POSIX extensions like
PF_UNIX, and on some systems will also disable features of later
POSIX versions, like IPv6. If we don't ask for a specific version,
we'll get some sort of sensible default.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=66257
Signed-off-by: Chengwei Yang <chengwei.yang@intel.com>
[made the commit message more concise -smcv]
Reviewed-by: Simon McVittie <simon.mcvittie@collabora.co.uk>
This commit is contained in:
Chengwei Yang 2013-06-28 20:26:28 +08:00 • committed by Simon McVittie
parent 61ef4139c4
commit 8cda82b726
1 changed files with 1 additions and 1 deletions
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2
cmake/CMakeLists.txt
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@ -103,7 +103,7 @@ find_package(EXPAT)
find_package(X11)
# analogous to AC_USE_SYSTEM_EXTENSIONS in configure.ac
add_definitions(-D_POSIX_C_SOURCE=199309L -D_GNU_SOURCE)
add_definitions(-D_GNU_SOURCE)
# do config checks
INCLUDE(ConfigureChecks.cmake)