powerpc-rtems-4.7-gcc-4.0 patch commited

[Till Straumann]

Hi Ralf

Ralf Corsepius wrote:

>Hi,
>
>FYI: I have committed my powerpc RTEMS-gcc multilib patches to GCC's CVS
>trunk (aka. GCC-4.0).
>
>This patch introduces a completely new layout of powerpc multilibs:
>
># powerpc-rtems4.7-gcc --print-multi-lib
>.;@mrelocatable-lib at mno-eabi@mstrict-align
>m403;@mcpu=403 at mrelocatable-lib@mno-eabi at mstrict-align
>m505;@mcpu=505 at mrelocatable-lib@mno-eabi at mstrict-align
>m601;@mcpu=601 at mrelocatable-lib@mno-eabi at mstrict-align
>m603e;@mcpu=603e at mrelocatable-lib@mno-eabi at mstrict-align
>m604;@mcpu=604 at mrelocatable-lib@mno-eabi at mstrict-align
>
Why do we need a m604 (and possibly more CPU variants)? I thought
the #ifdefs testing for a CPU type in RTEMS have been cleaned up?

>m860;@mcpu=860 at mrelocatable-lib@mno-eabi at mstrict-align
>m7400;@mcpu=7400 at mrelocatable-lib@mno-eabi at mstrict-align
>
I don't see the altivec options here - I guess --print-multi-lib doesn't 
show
all the active options?

>nof;@msoft-float at mrelocatable-lib@mno-eabi at mstrict-align
>m601/nof;@mcpu=601 at msoft-float@mrelocatable-lib at mno-eabi@mstrict-align
>m603e/mpc8260;@mcpu=603e at Dmpc8260@mrelocatable-lib at mno-eabi@mstrict-align
>m603e/nof;@mcpu=603e at msoft-float@mrelocatable-lib at mno-eabi@mstrict-align
>m603e/mpc8260/nof;@mcpu=603e at Dmpc8260@msoft-float at mrelocatable-lib@mno-eabi at mstrict-align
>m604/nof;@mcpu=604 at msoft-float@mrelocatable-lib at mno-eabi@mstrict-align
>m7400/nof;@mcpu=7400 at msoft-float@mrelocatable-lib at mno-eabi@mstrict-align
>
I definitively don't see the point of having a 604 and 7400 soft float 
variant.

-- Till

>roe/m403;@D_OLD_EXCEPTIONS at mcpu=403 at mrelocatable-lib@mno-eabi at mstrict-align
>roe/m603e;@D_OLD_EXCEPTIONS at mcpu=603e at mrelocatable-lib@mno-eabi at mstrict-align
>roe/m603e/nof;@D_OLD_EXCEPTIONS at mcpu=603e at msoft-float@mrelocatable-lib at mno-eabi@mstrict-align
>
>It reduces the number of multilibs from 30 variants down to 18 and has a
>-mcpu=7400 (altivec) multilib variant added. The default is -mcpu=750.
>Many CPU variants, which had separate multilib variants before, have
>been mapped ("multilib matched") to other cpus.
>Old-exception multilib variants which are not used by BSPs in the public
>source-tree have been removed.
>
>Until now, 
>* this GCC version has only been tested with RTEMS-CVS (aka. 4.7) and
>has _not_ been tested with rtems-4.6.x or before.
>* I am not sure this new multilib scheme is worth back-porting to
>gcc-3.x. Until now, I haven't tried and am not planning to do.
>
>Ralf
>
>
>  
>