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-rw-r--r--CMakeLists.txt6
1 files changed, 6 insertions, 0 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6c3f4d927d..35612e93dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -202,6 +202,12 @@ if(MSVC)
else()
add_definitions(-Wall -Wextra -pedantic -Wno-unused-parameter
-Wstrict-prototypes -std=gnu99)
+
+ # On FreeBSD 64 math.h uses unguarded C11 extension, which taints clang
+ # 3.4.1 used there.
+ if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+ add_definitions(-Wno-c11-extensions)
+ endif()
endif()
if(MINGW)