egcs-971031, sparc-sun-solaris2.5 new bootstrap failure

[H.J. Lu]

> 
> 	Building egcs-971031 on sparc-sun-solaris2.5 using BOOT_CFLAGS=
> "-g -O3 -funroll-all-loops" with cc for stage1 resulted in:
> 
>  > stage1/xgcc -Bstage1/ -DIN_GCC -DSVR4 -g -O3 -funroll-all-loops
>  > -DHAVE_CONFIG_H -o cccp cccp.o cexp.o \
>  >   version.o obstack.o ` case "stage1/xgcc -Bstage1/" in "cc") echo
>  > "alloca.o" ;; esac `
>  > Undefined                       first referenced
>  >  symbol                             in file
>  > .LL6861                             cccp.o
>  > ld: fatal: Symbol referencing errors. No output written to cccp
>  > collect2: ld returned 1 exit status
>  > make[1]: *** [cccp] Error 1
> 
> 	The dwarf patch made no difference.
> 
> 	I was able to bootstrap when using "-g -O2".

This may or may not be related to my -g -funroll-loops bug report.
I cannot use them together on x86 with my small test code.
-g -O -funroll-loops kills gcc.


H.J.
----
class String
{
public:
                    String();
                    ~String();
  int               OK() const;
};
void splittest()
{
  String w[10];
  for (int i = 0; i < 5; ++i)
  {
    if (!w[i].OK())
      return;
  }
}