c/5703: gcc powerpc64: -mcpu=630 links as 32-bits

[Kevin Ryde]

>Number:         5703
>Category:       c
>Synopsis:       gcc powerpc64: -mcpu=630 links as 32-bits
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Feb 15 15:06:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     
>Release:        3.0.3
>Organization:
>Environment:
System: AIX panther 3 4 000785504C00
host: powerpc-ibm-aix4.3.2.0
build: powerpc-ibm-aix4.3.2.0
target: powerpc-ibm-aix4.3.2.0
configured with: /u/gcc/gcc-3.0.3/configure 

>Description:
If -mcpu=630 is given, the linker appears to be invoked without the
gcc ppc64 directories.

>How-To-Repeat:
I'm afraid I don't have a simple case of something failing, I noticed
this on a GMP pre-release.  But the output of gcc -v is, I hope,
fairly clear.

A program foo.c

        int main (){}

compiled with

        gcc -maix64 -mpowerpc64 -mcpu=630 -c foo.c

when linked with

        gcc -v -maix64 -mpowerpc64 -mcpu=630 foo.o

reveals,

Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/specs
Configured with: /u/gcc/gcc-3.0.3/configure 
Thread model: single
gcc version 3.0.3
 /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/collect2 -bpT:0x10000000 -bpD:0x20000000 -btextro -bnodelcsect -b64 /lib/crt0_64.o -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3 -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/../../.. foo.o /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/libgcc.a -lc /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/libgcc.a

whereas linking with

        gcc -v -maix64 -mpowerpc64 foo.o

gives,

Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/specs
Configured with: /u/gcc/gcc-3.0.3/configure 
Thread model: single
gcc version 3.0.3
 /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/collect2 -bpT:0x10000000 -bpD:0x20000000 -btextro -bnodelcsect -b64 /lib/crt0_64.o -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/ppc64 -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3 -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/../../../ppc64 -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/../../.. foo.o /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/ppc64/libgcc.a -lc /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/3.0.3/ppc64/libgcc.a

I think the latter is what should be used, irrespective of whether
-mcpu=630 is given or not.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: