Features: Add cxx_static_assert.

Help/variable/CMAKE_CXX_KNOWN_FEATURES.rst

@@ -27,6 +27,11 @@ The features known to this version of CMake are:
 
   .. _N1986: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1986.pdf
 
+``cxx_static_assert``
+  Static assert, as defined in N1720_.
+
+  .. _N1720: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html
+
 ``cxx_variadic_templates``
   Variadic templates, as defined in N2242_.
 

Modules/Compiler/GNU-CXX-FeatureTests.cmake

@@ -24,4 +24,7 @@ set(_cmake_feature_test_cxx_variadic_templates "${GNU44_CXX11}")
 # 'completes' it, so that is the version we record as having the variadic
 # templates capability in CMake. See
 # http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf
+# TODO: Should be supported by GNU 4.3
+set(GNU43_CXX11 "${_oldestSupported} && __cplusplus >= 201103L")
+set(_cmake_feature_test_cxx_static_assert "${GNU43_CXX11}")
 set(_oldestSupported)

Source/cmMakefile.cxx

@@ -45,6 +45,7 @@
   F(cxx_auto_type) \
   F(cxx_constexpr) \
   F(cxx_delegating_constructors) \
+  F(cxx_static_assert) \
   F(cxx_variadic_templates)
 
 class cmMakefile::Internals

Tests/CompileFeatures/cxx_static_assert.cpp

@@ -0,0 +1,2 @@
+
+static_assert(true, "static_assert test");