Merge pull request #622 from jamborm/fix-toolchain-doc-251217

Small fixes for toolchain lifecycle documentation

Author: lvicoun

concepts/packages_lifecycle_toolchain.xml

@@ -40,8 +40,7 @@
       Package updates provide backward compatibility for dynamic linking, allowing programs built
       on previous &suselinux; 16 releases to run. On the contrary, symbols deprecated in the
       upstream <literal>glibc</literal> version will not be declared for the compiler and not
-      available for link editing (static linking). Such cases, when source level and static linking
-      backward compatibility is not guaranteed, are properly documented.
+      available for link editing (static linking).
     </para>
   </section>
 
@@ -60,10 +59,10 @@
     <itemizedlist>
       <listitem>
         <para>
-          Each even minor release of &suselinux; (the tick release) introduces a new major version of
-          GCC. This GCC version is supported during the LTS for the minor version that introduced
-          it and also for the next &suselinux; minor version. For example, if GCC 17 is introduced in
-          &suselinux; 16.2, it will be supported until the end of LTS for &suselinux; 16.3.
+          Each even minor release of &suselinux; (the tick release) introduces a new major version of GCC as
+          the default compiler. This GCC version is supported during the LTS for the minor version that
+          introduced it and also for the next &suselinux; minor version. For example, if GCC 17 is introduced
+          in &suselinux; 16.2, it will be supported until the end of LTS for &suselinux; 16.3.
         </para>
       </listitem>
       <listitem>
@@ -149,7 +148,11 @@
         For C++, the most recent supported version is ISO/IEC 14882:2017 (known as C++17) with GNU extensions.
       </para>
       <para>
-        &suse; also provides unsupported packages with compilers for Fortran, Ada and Go (gcc-go).
+        For Fortran, we support versions through Fortran 95 (ISO/IEC 1539:1997) with specific features of
+        later standard versions that are described in the manual.
+      </para>
+      <para>
+        &suse; also provides unsupported packages with compilers for Ada and Go (gcc-go).
       </para>
     </section>
   </section>

concepts/packages_lifecycle_types.xml

@@ -203,9 +203,10 @@ kernel: the kernel is updated with each minor release
       </listitem>
       <listitem>
         <para>
-          GCC: a new version of the compiler is released with each minor release with a
-          sliding window of 2. However, the libraries <literal>libgcc</literal> and
-          <literal>libstdc++</literal> are categorized as stable.
+          GCC: a new version of the compiler is released with each minor release, those introduced in odd minor versions
+          are not used by default and have a shorter support period, see
+          <xref linkend="packages-lifecycle-toolchain-applications"/> for details. However, the libraries
+          <literal>libgcc</literal> and <literal>libstdc++</literal> are categorized as stable.
         </para>
       </listitem>
       <listitem>