--- a/src/gcc/doc/install.texi
+++ b/src/gcc/doc/install.texi
@@ -1809,18 +1809,19 @@ their runtime libraries should be built.  For a list of valid values for
 @smallexample
 grep ^language= */config-lang.in
 @end smallexample
-Currently, you can use any of the following:
-@code{all}, @code{default}, @code{ada}, @code{c}, @code{c++}, @code{d},
-@code{fortran}, @code{go}, @code{jit}, @code{lto}, @code{objc}, @code{obj-c++}.
-Building the Ada compiler has special requirements, see below.
-If you do not pass this flag, or specify the option @code{default}, then the
-default languages available in the @file{gcc} sub-tree will be configured.
-Ada, D, Go, Jit, and Objective-C++ are not default languages.  LTO is not a
-default language, but is built by default because @option{--enable-lto} is
-enabled by default.  The other languages are default languages.  If
-@code{all} is specified, then all available languages are built.  An
-exception is @code{jit} language, which requires
-@option{--enable-host-shared} to be included with @code{all}.
+Currently, you can use any of the following: @code{all},
+@code{default}, @code{ada}, @code{c}, @code{c++}, @code{d},
+@code{fortran}, @code{go}, @code{jit}, @code{lto}, @code{m2},
+@code{objc}, @code{obj-c++}.  Building the Ada compiler has special
+requirements, see below.  If you do not pass this flag, or specify the
+option @code{default}, then the default languages available in the
+@file{gcc} sub-tree will be configured.  Ada, D, Go, Jit,
+Objective-C++ and Modula-2 are not default languages.  LTO is not a
+default language, but is built by default because
+@option{--enable-lto} is enabled by default.  The other languages are
+default languages.  If @code{all} is specified, then all available
+languages are built.  An exception is @code{jit} language, which
+requires @option{--enable-host-shared} to be included with @code{all}.
 
 @item --enable-stage1-languages=@var{lang1},@var{lang2},@dots{}
 Specify that a particular subset of compilers and their runtime
@@ -1843,6 +1844,10 @@ be built.  This can be useful for debugging, or for compatibility with
 previous Ada build procedures, when it was required to explicitly
 do a @samp{make -C gcc gnatlib_and_tools}.
 
+@item --disable-libgm2
+Specify that the run-time libraries and tools used by Modula-2 should not
+be built.  This can be useful for debugging.
+
 @item --disable-libsanitizer
 Specify that the run-time libraries for the various sanitizers should
 not be built.
@@ -3111,10 +3116,10 @@ on a simulator as described at @uref{https://gcc.gnu.org/simtest-howto.html}.
 In order to run sets of tests selectively, there are targets
 @samp{make check-gcc} and language specific @samp{make check-c},
 @samp{make check-c++}, @samp{make check-d} @samp{make check-fortran},
-@samp{make check-ada}, @samp{make check-objc}, @samp{make check-obj-c++},
-@samp{make check-lto}
-in the @file{gcc} subdirectory of the object directory.  You can also
-just run @samp{make check} in a subdirectory of the object directory.
+@samp{make check-ada}, @samp{make check-m2}, @samp{make check-objc},
+@samp{make check-obj-c++}, @samp{make check-lto} in the @file{gcc}
+subdirectory of the object directory.  You can also just run
+@samp{make check} in a subdirectory of the object directory.
 
 
 A more selective way to just run all @command{gcc} execute tests in the
--- a/src/gcc/doc/sourcebuild.texi
+++ b/src/gcc/doc/sourcebuild.texi
@@ -52,6 +52,9 @@ including optimizers, support for different target architectures,
 language front ends, and testsuites.  @xref{gcc Directory, , The
 @file{gcc} Subdirectory}, for details.
 
+@item gm2tools
+Support tools for Modula-2.
+
 @item gnattools
 Support tools for GNAT.
 
@@ -84,6 +87,9 @@ The GCC runtime library.
 @item libgfortran
 The Fortran runtime library.
 
+@item libgm2
+The Modula-2 runtime library.
+
 @item libgo
 The Go runtime library.  The bulk of this library is mirrored from the
 @uref{https://github.com/@/golang/go, master Go repository}.
@@ -163,13 +169,12 @@ The @file{gcc} directory contains the following subdirectories:
 @item @var{language}
 Subdirectories for various languages.  Directories containing a file
 @file{config-lang.in} are language subdirectories.  The contents of
-the subdirectories @file{c} (for C), @file{cp} (for C++),
-@file{objc} (for Objective-C), @file{objcp} (for Objective-C++),
-and @file{lto} (for LTO) are documented in this
-manual (@pxref{Passes, , Passes and Files of the Compiler});
-those for other languages are not.  @xref{Front End, ,
-Anatomy of a Language Front End}, for details of the files in these
-directories.
+the subdirectories @file{c} (for C), @file{cp} (for C++), @file{m2}
+(for Modula-2), @file{objc} (for Objective-C), @file{objcp} (for
+Objective-C++), and @file{lto} (for LTO) are documented in this manual
+(@pxref{Passes, , Passes and Files of the Compiler}); those for other
+languages are not.  @xref{Front End, , Anatomy of a Language Front
+End}, for details of the files in these directories.
 
 @item common
 Source files shared between the compiler drivers (such as
