Add export linker flags policy to cmake (#251)

Add policy CMP0056, which honors the link flags in try_compile and try_run. This allows for building against non-system libc++ by providing the correct -L and rpath options in a containing project. For example: set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L ${LLVM_ROOT}/lib -l c++ -l c++abi") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-rpath,${LLVM_ROOT}/lib")

Add export linker flags policy to cmake (#251)
2149577f · Steve Downey · Dominic Hamon · 885ca41c · 2149577f
Commit 2149577f authored Jul 06, 2016 by Steve Downey Committed by Dominic Hamon Jul 06, 2016
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CMakeLists.txt CMakeLists.txt +1 -0

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,7 @@ project (benchmark)
 foreach(p
    CMP0054 # CMake 3.1
+    CMP0056 # export EXE_LINKER_FLAGS to try_run
    )
  if(POLICY ${p})
    cmake_policy(SET ${p} NEW)