Re: GCC 8.1 Released

Re: GCC 8.1 Released

[Janne Blomqvist]

On Fri, May 4, 2018 at 9:31 AM, Janne Blomqvist <blomqvist.janne@gmail.com>
wrote:

> On Fri, May 4, 2018 at 9:22 AM, Bert Wesarg <bert.wesarg@googlemail.com>
> wrote:
>
>> Hi,
>>
>> On Wed, May 2, 2018 at 2:15 PM, Jakub Jelinek <jakub@redhat.com> wrote:
>> > Some code that compiled successfully with older GCC versions might
>> require
>> > source changes, see http://gcc.gnu.org/gcc-8/porting_to.html for
>> > details.
>>
>> in "Fortran language issues" it reads: "Prior to GCC 7", shouldn't
>> that be "Prior to GCC 8" or "Up to GCC 7"?
>>
>
> Yes, indeed it should. Thanks for noticing.
>
>
>>
>> And can somebody can tell me, whether this Fortran issue effects also
>> Fortran code which calls C functions?
>>
>>
> If it's a "normal" C function with NULL-terminated strings, then no. If
> it's a C function which is designed to follow the Fortran procedure ABI
> (where strings are passed as a pointer + a hidden length argument), then
> yes.
>
>
>
> --
> Janne Blomqvist
>


I committed the following:

cvs diff: Diffing .
Index: porting_to.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-8/porting_to.html,v
retrieving revision 1.5
diff -p -u -r1.5 porting_to.html
--- porting_to.html    25 Apr 2018 15:46:36 -0000    1.5
+++ porting_to.html    4 May 2018 06:34:31 -0000
@@ -167,12 +167,12 @@ In member function 'bool B&lt;T&gt;::f()
   Character lengths are now handled as
   an <code>INTEGER(kind=C_SIZE_T)</code> variable whose size is
   dependent on the target system, allowing characters longer than
-  2**31 on 64-bit targets. Prior to GCC 7, the character length was
+  2**31 on 64-bit targets. Prior to GCC 8, the character length was
   an <code>INTEGER(kind=4)</code> variable on all targets. If calling
-  a Fortran procedure with character arguments from C without using
-  the standard ISO_C_BINDING feature, the hidden character length
-  argument at the end of the argument list must thus be modified to be
-  of type <code>size_t</code> rather than of
+  a Fortran procedure with character arguments from C (or vice versa)
+  without using the standard ISO_C_BINDING feature, the hidden
+  character length argument at the end of the argument list must thus
+  be modified to be of type <code>size_t</code> rather than of
   type <code>int</code>. For instance, calling the Fortran subroutine
 </p>
   <pre><code>


-- 
Janne Blomqvist