5 files changed, 13 insertions, 15 deletions
diff --git a/Help/release/dev/GNU-4.6-compile-features.rst b/Help/release/dev/GNU-4.4-compile-features.rst
index 059a075..d5c1356 100644
--- a/Help/release/dev/GNU-4.6-compile-features.rst
+++ b/Help/release/dev/GNU-4.4-compile-features.rst
@@ -1,5 +1,5 @@
-GNU-4.6-compile-features
+GNU-4.4-compile-features
 ------------------------
 
 * The :manual:`Compile Features <cmake-compile-features(7)>` functionality
-  is now aware of features supported by GNU 4.6 compilers.
+  is now aware of features supported by GNU 4.4 to 4.6 compilers.
diff --git a/Modules/Compiler/GNU-C-FeatureTests.cmake b/Modules/Compiler/GNU-C-FeatureTests.cmake
index 7e840aa..d8e456c 100644
--- a/Modules/Compiler/GNU-C-FeatureTests.cmake
+++ b/Modules/Compiler/GNU-C-FeatureTests.cmake
@@ -1,5 +1,5 @@
 
-set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406")
+set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404")
 
 # GNU 4.7 correctly sets __STDC_VERSION__ to 201112L, but GNU 4.6 sets it
 # to 201000L.  As the former is strictly greater than the latter, test only
@@ -9,7 +9,7 @@ set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406")
 set(GNU46_C11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201000L")
 set(_cmake_feature_test_c_static_assert "${GNU46_C11}")
 # Since 4.4 at least:
-set(GNU44_C99 "${_cmake_oldestSupported} && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L")
+set(GNU44_C99 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404 && defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L")
 set(_cmake_feature_test_c_restrict "${GNU44_C99}")
 set(_cmake_feature_test_c_variadic_macros "${GNU44_C99}")
 
diff --git a/Modules/Compiler/GNU-C.cmake b/Modules/Compiler/GNU-C.cmake
index d5e747d..3036057 100644
--- a/Modules/Compiler/GNU-C.cmake
+++ b/Modules/Compiler/GNU-C.cmake
@@ -1,7 +1,7 @@
 include(Compiler/GNU)
 __compiler_gnu(C)
 
-if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
+if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
   set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
   set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
 
@@ -12,7 +12,7 @@ endif()
 if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
   set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
   set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
-elseif (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
+elseif (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
   set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c1x")
   set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu1x")
 endif()
@@ -29,7 +29,7 @@ macro(cmake_record_c_compile_features)
   endmacro()
 
   set(_result 0)
-  if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.6)
+  if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.4)
     _get_gcc_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
     if (_result EQUAL 0)
       _get_gcc_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
diff --git a/Modules/Compiler/GNU-CXX-FeatureTests.cmake b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
index c265e73..5fc3deb 100644
--- a/Modules/Compiler/GNU-CXX-FeatureTests.cmake
+++ b/Modules/Compiler/GNU-CXX-FeatureTests.cmake
@@ -2,7 +2,7 @@
 # Reference: http://gcc.gnu.org/projects/cxx0x.html
 # http://gcc.gnu.org/projects/cxx1y.html
 
-set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 406")
+set(_cmake_oldestSupported "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404")
 
 set(GNU50_CXX14 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 500 && __cplusplus >= 201402L")
 set(_cmake_feature_test_cxx_variable_templates "${GNU50_CXX14}")
@@ -67,14 +67,12 @@ set(_cmake_feature_test_cxx_noexcept "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_nullptr "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_range_for "${GNU46_CXX11}")
 set(_cmake_feature_test_cxx_unrestricted_unions "${GNU46_CXX11}")
-# TODO: Should be supported by GNU 4.5
-set(GNU45_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}")
+set(GNU45_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 405 && ${GNU_CXX0X_DEFINED}")
 set(_cmake_feature_test_cxx_explicit_conversions "${GNU45_CXX11}")
 set(_cmake_feature_test_cxx_lambdas "${GNU45_CXX11}")
 set(_cmake_feature_test_cxx_local_type_template_args "${GNU45_CXX11}")
 set(_cmake_feature_test_cxx_raw_string_literals "${GNU45_CXX11}")
-# TODO: Should be supported by GNU 4.4
-set(GNU44_CXX11 "${_cmake_oldestSupported} && ${GNU_CXX0X_DEFINED}")
+set(GNU44_CXX11 "(__GNUC__ * 100 + __GNUC_MINOR__) >= 404 && ${GNU_CXX0X_DEFINED}")
 set(_cmake_feature_test_cxx_auto_type "${GNU44_CXX11}")
 set(_cmake_feature_test_cxx_defaulted_functions "${GNU44_CXX11}")
 set(_cmake_feature_test_cxx_deleted_functions "${GNU44_CXX11}")
diff --git a/Modules/Compiler/GNU-CXX.cmake b/Modules/Compiler/GNU-CXX.cmake
index eeada86..c471daf 100644
--- a/Modules/Compiler/GNU-CXX.cmake
+++ b/Modules/Compiler/GNU-CXX.cmake
@@ -11,7 +11,7 @@ else()
   endif()
 endif()
 
-if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
+if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
   # Supported since 4.3
   set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++98")
   set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
@@ -20,7 +20,7 @@ endif()
 if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
   set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
-elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
+elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
   # 4.3 supports 0x variants
   set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++0x")
   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
@@ -45,7 +45,7 @@ macro(cmake_record_cxx_compile_features)
   if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
     _get_gcc_features(${CMAKE_CXX14_STANDARD_COMPILE_OPTION} CMAKE_CXX14_COMPILE_FEATURES)
   endif()
-  if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
+  if (UNIX AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
     if (_result EQUAL 0)
       _get_gcc_features(${CMAKE_CXX11_STANDARD_COMPILE_OPTION} CMAKE_CXX11_COMPILE_FEATURES)
     endif()