4.1.30 and 4.1.31 build failure on S10x86 5/08

(Using Sun Studio 12 with all patches and OS fully patched)

4.1.30, 4.1.31, 5.0.4 all fail on arc4random.c

[4.1.29 compiles just fine....]


I didnt see anything in the list archives about anyone reporting
a problem....


/opt/SUNWspro/prod/bin/cc -Xa -xildoff -I. -I../.. -DIPFILTER_LKM 
-I../../../pfil -D_KERNEL -DSUNDDI  -DSOLARIS2=10 -DIPFILTER_LOG 
-DIPFILTER_LOOKUP -DIPFILTER_SCAN  -c ../../radix.c -o radix.o
/opt/SUNWspro/prod/bin/cc -Xa -xildoff -I. -I../.. -DIPFILTER_LKM 
-I../../../pfil -D_KERNEL -DSUNDDI  -DSOLARIS2=10 -DIPFILTER_LOG 
-DIPFILTER_LOOKUP -DIPFILTER_SCAN  -c ../../md5.c -o md5.o
/opt/SUNWspro/prod/bin/cc -Xa -xildoff -I. -I../.. -DIPFILTER_LKM 
-I../../../pfil -D_KERNEL -DSUNDDI  -DSOLARIS2=10 -DIPFILTER_LOG 
-DIPFILTER_LOOKUP -DIPFILTER_SCAN  -DNEED_LOCAL_RAND=1 -c 
../../arc4random.c -o arc4random.o
"../../arc4random.c", line 46: warning: no explicit type given
"../../arc4random.c", line 46: syntax error before or at: void
"../../arc4random.c", line 242: warning: pointer to void or function 
used in arithmetic
"../../arc4random.c", line 242: warning: pointer to void or function 
used in arithmetic
cc: acomp failed for ../../arc4random.c
*** Error code 2
make: Fatal error: Command failed for target `arc4random.o'
Current working directory /export/home/junk/ip_fil4.1.31/SunOS5/i386-5.10
*** Error code 1
make: Fatal error: Command failed for target `sunos5'
Current working directory /export/home/junk/ip_fil4.1.31
*** Error code 1
make: Fatal error: Command failed for target `solaris'


..this is with all patches and after a full fresh install.