$ cc -O2 -Wall -o uvd_ib_desync uvd_ib_desync.c
uvd_ib_desync.c:6:51: warning: "/*" within comment [-Wcomment]
  *   radeon_uvd_cs_reg() (line 648) records *data0/*data1 as "IB dword index
                                                    
uvd_ib_desync.c: In function 'main':
uvd_ib_desync.c:103:16: warning: unused variable 'r' [-Wunused-variable]
     int fd, i, r = 1;
                ^
$ ls -l uvd_ib_desync
-rwxr-xr-x  1 root  wheel  9392 Sep 20 20:51 uvd_ib_desync
BUILD_OK_DF4500
(build host: DragonFly dfbsd 6.5-DEVELOPMENT x86_64, guest root@dfbsd, /tmp/df4500)