gcc-2.96-85 compile of C++ code fails on RH 7.1

[Kathy Bieltz]

I submitted a report to bugzilla and
received the following comment:
"+-fschedule-insns is not to be used on register starved machines like
i386.
+It generally creates much worse code on those, plus results in reload
errors
+too.
+-fschedule-insns2 is more appropriate on i386, but -O2 already enables
it
+by default.
"
I removed the '--schedule-insns' option and
my C++ library compiled fine.

My thanks to the folks at redhat who answered
so promptly.

Kathy Bieltz


Kathy Bieltz wrote:

> The same C++ code that compiles with kgcc and gcc-2.91-66 fails when
> I attempt to compile it with gcc-2.96-85.  Here is the log of the make:
> /usr/bin/gcc -c -Wall -O2 -I. --schedule-insns -DINTEL -DUNIX -DLINUX -DSVR4
> Array.cpp -fPIC -DPIC -o obj/Array.o
> /usr/bin/gcc -c -Wall -O2 -I. --schedule-insns -DINTEL -DUNIX -DLINUX -DSVR4
> Cache.cpp -fPIC -DPIC -o obj/Cache.o
> Cache.cpp: In method `Bool Cache::Remove (MntrObject *, int)':
> Cache.cpp:128: Unable to find a register to spill in class `AREG'.
> Cache.cpp:128: confused by earlier errors, bailing out
> make[4]: *** [obj/Cache.o] Error 1
> make[3]: *** [releaseso] Error 2
> make[2]: *** [releaseso] Error 2
> make[1]: *** [releaseso] Error 2
> make: *** [releaseso] Error 2
>
> I need to compile this C++ library with gcc-2.96-85 so I can link it into
> other executables compiled with gcc-2.96-85.  I can't compile
> working executables for RH 7.1 until I get this fixed.
>
> Any ideas on work-around or fix would be appreciated.
>
> Thanks!
> Kathy Bieltz
>
> _______________________________________________
> Seawolf-list mailing list
> Seawolf-list@redhat.com
> https://listman.redhat.com/mailman/listinfo/seawolf-list