doc: Streamline requirements on the build compiler

No need to talk about potential implementation bugs in older versions
than what we require.  And no need to talk about building GCC 3.3 and
earlier at this point.

gcc:
	PR other/69374
	* doc/install.texi (Prerequisites): Simplify note on the C++
	compiler required. Drop requirements for versions of GCC prior
	to 3.4. Fix grammar.

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 165d48c02f8a2d187441d34bf6d83983debdc486..0baba5e594dc61cabfd91acef9bf673f2632a616 100644 (file)
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -224,13 +224,11 @@ described below.
 @table @asis
 @item ISO C++11 compiler
 Necessary to bootstrap GCC.  GCC 4.8.3 or newer has sufficient
-support for used C++11 features, with earlier GCC versions you
-might run into implementation bugs.
+support for used C++11 features.
 
 Versions of GCC prior to 11 also allow bootstrapping with an ISO C++98
-compiler, versions of GCC prior to 4.8 also allow bootstrapping with a
-ISO C89 compiler, and versions of GCC prior to 3.4 also allow
-bootstrapping with a traditional (K&R) C compiler.
+compiler, and versions of GCC prior to 4.8 also allow bootstrapping with
+an ISO C89 compiler.
 
 To build all languages in a cross-compiler or other configuration where
 3-stage bootstrap is not performed, you need to start with an existing