Compiling squid 1.0.0 on Linux, I get this:
Making all in src...                                                    
make[1]: Entering directory `/usr/software/squid-1.0.0/src'             
gcc -g -O -Wall -I. -I../include -I./../include    -c main.c -o main.o  
main.c: In function `mainInitialize':                                   
main.c:373: `SA_RESETHAND' undeclared (first use this function)         
main.c:373: (Each undeclared identifier is reported only once           
main.c:373: for each function it appears in.)                           
make[1]: *** [main.o] Error 1                                           
make[1]: Leaving directory `/usr/software/squid-1.0.0/src'              
make: *** [all] Error 2                                                 
Received on Tue Jul 02 1996 - 02:02:13 MDT
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