🚀 go-pugleaf

I have been unable to compile GCC 2.1 under SGI's IRIX version 4.
While "configure" is perfectly happy with being told simply:
 
    configure iris
 
the subsequent "make" fails, albeit after many successful object compiles,
on the file "mips-tfile.c" --- here's the log.
 
//////////////////////////////////////////////////
 
make LANGUAGES=c
        cc -Wf,-XNg1500 -c  -O1  -g     -I. -I. -I./config mips-tfile.c
accom: Error: /usr/include/errno.h, line 47: Qualifier mismatch in prototype,
pointer to const  char  versus   pointer to char
       extern void      perror(  char *);
       ---------------------------------^
accom: Error: /usr/include/errno.h, line 47: inconsistent prototypes for
function perror
       extern void      perror(  char *);
       ---------------------------------^
accom: Warning 100: mips-tfile.c, line 4979: statement not reached
         return 0;
       ----------^
*** Error code 1
 
Stop.
4.2u 3.3s 0:09 79%
 
////////////////////////////////////////////////////
 
Any suggestions?
 
Making the "configure" call more explicit, ie
 
    configure mips-sgi-irix4
 
Fails even more rapidly, with bogus (for the MIPS C compiler) calls to
alloca().
 
I have repeated this failure on both my 4D35 (R3000 CPU) and a Crimson (R4000
CPU).
 
kb