From dcaafada0e213ae74082be84812a38d7f2a4a860 Mon Sep 17 00:00:00 2001
From: Stephen Kelly <steveire@gmail.com>
Date: Sun, 6 Apr 2014 10:52:38 +0200
Subject: Features: Add cxx_func_identifier.

---
 Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst    | 5 +++++
 Modules/Compiler/GNU-CXX-FeatureTests.cmake   | 1 +
 Source/cmMakefile.cxx                         | 1 +
 Tests/CompileFeatures/cxx_func_identifier.cpp | 6 ++++++
 4 files changed, 13 insertions(+)
 create mode 100644 Tests/CompileFeatures/cxx_func_identifier.cpp

diff --git a/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
index 1a76a3b..32b47e4 100644
--- a/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
+++ b/Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst
@@ -97,6 +97,11 @@ The features known to this version of CMake are:
 
   .. _N2928: http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm
 
+``cxx_func_identifier``
+  Predefined ``__func__`` identifier, as defined in N2340_.
+
+  .. _N2340: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2340.htm
+
 ``cxx_generalized_initializers``
   Initializer lists, as defined in N2672_.
 
diff --git a/Modules/Compiler/GNU-CXX-FeatureTests.cmake b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
index 586ab4b..d727cac 100644
--- a/Modules/Compiler/GNU-CXX-FeatureTests.cmake
+++ b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
@@ -70,5 +70,6 @@ set(_cmake_feature_test_cxx_static_assert "${GNU43_CXX11}")
 # TODO: Should be supported since GNU 3.4?
 set(_cmake_feature_test_cxx_extern_templates "${_oldestSupported} && __cplusplus >= 201103L")
 # TODO: Should be supported forever?
+set(_cmake_feature_test_cxx_func_identifier "${_oldestSupported} && __cplusplus >= 201103L")
 set(_cmake_feature_test_cxx_variadic_macros "${_oldestSupported} && __cplusplus >= 201103L")
 set(_oldestSupported)
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 7b960a3..508ace5 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -59,6 +59,7 @@
   F(cxx_extended_friend_declarations) \
   F(cxx_extern_templates) \
   F(cxx_final) \
+  F(cxx_func_identifier) \
   F(cxx_generalized_initializers) \
   F(cxx_inheriting_constructors) \
   F(cxx_inline_namespaces) \
diff --git a/Tests/CompileFeatures/cxx_func_identifier.cpp b/Tests/CompileFeatures/cxx_func_identifier.cpp
new file mode 100644
index 0000000..0c3595c
--- /dev/null
+++ b/Tests/CompileFeatures/cxx_func_identifier.cpp
@@ -0,0 +1,6 @@
+
+void someFunc()
+{
+  bool b = sizeof(__func__);
+  (void)b;
+}
-- 
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