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authorAndreas Schneider <asn@cryptomilk.org>2012-06-25 14:30:31 +0200
committerAndreas Schneider <asn@cryptomilk.org>2012-06-25 14:30:31 +0200
commit95c7ecbb505f0870c0b415b06d23e813336bee55 (patch)
tree7db5fee3d781586a381fd2a63445f6b815dfc701 /cmake
parentb8114912ad7cc5d3f031675938d8e84035a98732 (diff)
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cmake: Check for _GNU_SOURCE and add it if available.
This is needed for strsignal().
Diffstat (limited to 'cmake')
-rw-r--r--cmake/Modules/DefineCompilerFlags.cmake5
1 files changed, 5 insertions, 0 deletions
diff --git a/cmake/Modules/DefineCompilerFlags.cmake b/cmake/Modules/DefineCompilerFlags.cmake
index 3a6a454..239ddeb 100644
--- a/cmake/Modules/DefineCompilerFlags.cmake
+++ b/cmake/Modules/DefineCompilerFlags.cmake
@@ -29,6 +29,11 @@ if (UNIX AND NOT WIN32)
if (WITH_FORTIFY_SOURCE)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_FORTIFY_SOURCE=2")
endif (WITH_FORTIFY_SOURCE)
+
+ check_c_compiler_flag("-D_GNU_SOURCE" WITH_GNU_SOURCE)
+ if (WITH_GNU_SOURCE)
+ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_GNU_SOURCE")
+ endif (WITH_GNU_SOURCE)
endif (${CMAKE_C_COMPILER_ID} MATCHES GNU)
#