address review comments

diff --git a/doc/news/changes/incompatibilities/20200521Maier-2 b/doc/news/changes/incompatibilities/20200521Maier-2
index e18f51956f2e52c1132642a0958a8a0e0bb5ba41..3f56753e0dd977f5fa01607cdb8fd2260eaaf752 100644 (file)
--- a/doc/news/changes/incompatibilities/20200521Maier-2
+++ b/doc/news/changes/incompatibilities/20200521Maier-2
@@ -1,9 +1,9 @@
 Removed: The <code>DEAL_II_WITH_CXX14</code> and
 <code>DEAL_II_WITH_CXX17</code> configuration options have been removed.
-The library will now be compiled with the defaultr C++ standard enabled by
+The library will now be compiled with the default C++ standard enabled by
 the compiler. This is (as of May 2020) C++14 for all compilers. If you want
 to override that behavior, please set the C++ standard directly for example
 by configuring with <code>-DDEAL_II_CXX_FLAGS="-std=c++17"</code>, or by
-setting the environement variable <code>CXXFLAGS="-std=c++17".
+setting the environement variable <code>CXXFLAGS="-std=c++17"</code>.
 <br>
 (Matthias Maier, 2020/05/21)

diff --git a/doc/users/cmake_dealii.html b/doc/users/cmake_dealii.html
index f64ccd9f5dc5663e5515e8b3ba5a99f4edcc2426..c91e866900e358d672af1de740fe0d2dbde1446b 100644 (file)
--- a/doc/users/cmake_dealii.html
+++ b/doc/users/cmake_dealii.html
@@ -417,7 +417,18 @@ library        - builds and installs the 'library' component
       configuration.
     </p>
 
-
+    <p>
+      The library will be compiled with the default C++ standard enabled by
+      the compiler. This is (as of May 2020) C++14 for all compilers. If
+      you want to override this behavior, please set the C++ standard
+      directly for example by configuring with
+      <code>-DDEAL_II_CXX_FLAGS="-std=c++17"</code>, or by setting the
+      environement variable <code>CXXFLAGS="-std=c++17"</code>.
+
+      Similarly, for enabling SIMD vectorization support, you have to set
+      an appropriate target architecture via <code>-march=...</code>, for
+      example <code>-DDEAL_II_CXX_FLAGS="-march=native"</code>.
+    </p>
 
     <a name="configurefeature"></a>
     <h3>Feature configuration</h3>