question in install gcc on SCO unix 3.2v5.0.4

[wangji]

I downloaded gcc-2.95.3 from gnu.I want to use 
it in my PC with SCO UNIX 3.2v5.0.4. On my PC , I have installed SCO 
development system . It uses cc/CC to compile c/c++ program. After running 
./configure , I run make . While compiling bad.c , cc reports  that 
"-W-Wall" option is error. So I delete "-W -Wall" option 
in Makefile . And then proty.h(Maybe a other name like it) compiles 
error, Compile programm reports the Line :#ERROR: "..." --- 
error, And there is another program error in the Line : typedef long long 
something . I think that there is something not supported by SCO UNIX 
compiler,and I also think there only have two ways to solve the 
problem: 1.change the program 2.get a old version gcc binary to install , 
and use it to compile the program again
 
And so can anyone help me 
?