Patchwork Adjust build requirement docs for GCC 4.8

login
register
mail settings
Submitter Richard Guenther
Date Dec. 11, 2012, 10:14 a.m.
Message ID <alpine.LNX.2.00.1212111110560.5397@zhemvz.fhfr.qr>
Download mbox | patch
Permalink /patch/205153/
State New
Headers show

Comments

Richard Guenther - Dec. 11, 2012, 10:14 a.m.
This brings the build-requirements up-to-date with us now requiring
a C++ host compiler.  I optimistically increased the minimum required
GCC version listed from 2.95 to 3.4 as that is the earliest version
that could reasonably be called a C++98 compatible compiler (yeah,
lawrence will now argue that we want to require C++04 or how it was
called).

Installed.  Suggestions for incremental improvements (including
actually verifying the requirements) welcome.

At least this fixes this P1 bug for me.

Thanks,
Richard.

2012-12-11  Richard Biener  <rguenther@suse.de>

	PR other/54324
	* doc/install.texi (Tools/packages necessary for building GCC):
	State ISO C++98 host compiler requirement.  Increment minimum
	GCC version required for building all languages for a cross-compiler
	to 3.4 or later.
Gabriel Dos Reis - Dec. 11, 2012, 1:51 p.m.
On Tue, Dec 11, 2012 at 4:14 AM, Richard Biener <rguenther@suse.de> wrote:
>
> This brings the build-requirements up-to-date with us now requiring
> a C++ host compiler.  I optimistically increased the minimum required
> GCC version listed from 2.95 to 3.4 as that is the earliest version
> that could reasonably be called a C++98 compatible compiler (yeah,
> lawrence will now argue that we want to require C++04 or how it was
> called).

For a long period of time, we (in the GCC/g++ front-end land) did not
make much distinction between C++98 and C++03 because the latter
is just a bug fix of the former.  I am not sure we are using any
construct for which the distinction would matter in practice or
whether there is any real C++ compiler used to bootstrap GCC for
which the fine distinctions matter.

-- Gaby

Patch

Index: gcc/doc/install.texi
===================================================================
--- gcc/doc/install.texi	(revision 194388)
+++ gcc/doc/install.texi	(working copy)
@@ -243,13 +243,15 @@  described below.
 
 @heading Tools/packages necessary for building GCC
 @table @asis
-@item ISO C90 compiler
+@item ISO C++98 compiler
 Necessary to bootstrap GCC, although versions of GCC prior
-to 3.4 also allow bootstrapping with a traditional (K&R) C compiler.
+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.
 
 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
-GCC binary (version 2.95 or later) because source code for language
+GCC binary (version 3.4 or later) because source code for language
 frontends other than C might use GCC extensions.
 
 @item GNAT