Imported Upstream version 0.13.2+dsfg1

cmake/Modules/FindCXX11.cmake

@@ -0,0 +1,68 @@
+# - Finds if the compiler has C++11 support
+# This module can be used to detect compiler flags for using C++11, and checks
+# a small subset of the language.
+#
+# The following variables are set:
+#   CXX11_FLAGS - flags to add to the CXX compiler for C++11 support
+#   CXX11_FOUND - true if the compiler supports C++11
+#
+
+if(CXX11_FLAGS)
+    set(CXX11_FOUND TRUE)
+    return()
+endif()
+
+include(CheckCXXSourceCompiles)
+
+if(MSVC)
+    set(CXX11_FLAG_CANDIDATES
+	    " "
+        )
+else()
+    set(CXX11_FLAG_CANDIDATES
+        #gcc
+        "-std=gnu++11"
+        "-std=gnu++0x"
+        #Gnu and Intel Linux
+        "-std=c++11"
+        "-std=c++0x"
+        #Microsoft Visual Studio, and everything that automatically accepts C++11
+        " "
+        #Intel windows
+        "/Qstd=c++11"
+        "/Qstd=c++0x"
+        )
+endif()
+
+set(CXX11_TEST_SOURCE
+"
+int main()
+{
+    int n[] = {4,7,6,1,2};
+	int r;
+	auto f = [&](int j) { r = j; };
+	
+    for (auto i : n)
+        f(i);
+    return 0;
+}
+")
+
+foreach(FLAG ${CXX11_FLAG_CANDIDATES})
+    set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
+    set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+    unset(CXX11_FLAG_DETECTED CACHE)
+    message(STATUS "Try C++11 flag = [${FLAG}]")
+    check_cxx_source_compiles("${CXX11_TEST_SOURCE}" CXX11_FLAG_DETECTED)
+    set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
+    if(CXX11_FLAG_DETECTED)
+        set(CXX11_FLAGS_INTERNAL "${FLAG}")
+        break()
+    endif(CXX11_FLAG_DETECTED)
+endforeach(FLAG ${CXX11_FLAG_CANDIDATES})
+
+set(CXX11_FLAGS "${CXX11_FLAGS_INTERNAL}" CACHE STRING "C++11 Flags")
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(CXX11 DEFAULT_MSG CXX11_FLAGS)
+mark_as_advanced(CXX11_FLAGS)