Help: Update compiler versions in cmake-compile-features.7.rst

Help/manual/cmake-compile-features.7.rst

@@ -331,9 +331,9 @@ and :prop_gbl:`compile features <CMAKE_CXX_KNOWN_FEATURES>` available from
 the following :variable:`compiler ids <CMAKE_<LANG>_COMPILER_ID>` as of the
 versions specified for each:
 
-* ``AppleClang``: Apple Clang for Xcode versions 4.4 though 6.2.
-* ``Clang``: Clang compiler versions 2.9 through 3.4.
-* ``GNU``: GNU compiler versions 4.4 through 5.0.
+* ``AppleClang``: Apple Clang for Xcode versions 4.4 though 9.2.
+* ``Clang``: Clang compiler versions 2.9 through 6.0.
+* ``GNU``: GNU compiler versions 4.4 through 8.0.
 * ``MSVC``: Microsoft Visual Studio versions 2010 through 2017.
 * ``SunPro``: Oracle SolarisStudio versions 12.4 through 12.6.
 * ``Intel``: Intel compiler versions 12.1 through 17.0.
@@ -344,7 +344,7 @@ the following :variable:`compiler ids <CMAKE_<LANG>_COMPILER_ID>` as of the
 versions specified for each:
 
 * all compilers and versions listed above for C++.
-* ``GNU``: GNU compiler versions 3.4 through 5.0.
+* ``GNU``: GNU compiler versions 3.4 through 8.0.
 
 CMake is currently aware of the :prop_tgt:`C++ standards <CXX_STANDARD>` and
 their associated meta-features (e.g. ``cxx_std_11``) available from the
@@ -366,4 +366,4 @@ CMake is currently aware of the :prop_tgt:`CUDA standards <CUDA_STANDARD>`
 from the following :variable:`compiler ids <CMAKE_<LANG>_COMPILER_ID>` as of the
 versions specified for each:
 
-* ``NVIDIA``: NVIDIA nvcc compiler 7.5 though 8.0.
+* ``NVIDIA``: NVIDIA nvcc compiler 7.5 though 9.1.