Old C Code Headaches

So in a fit of insanity, I have a VM running NetBSD 1.6.2 (the earliest I can get to run for me under Virtual Box) that I'm trying to build the old Franz Lisp (from the 4.2BSD days) on. There was a port done by Jeff Dalton back in 1994 to i386 NetBSD .9 so there is a working executable but to get the libraries up to date requires a build. That is exposing a bunch of early '80's code that isn't working too well. Stuff like: lispval Ndumplisp() { register struct exec *workp; register lispval argptr, temp; register char *fname; extern int reborn; struct exec work, old; extern int dmpmode,usehole; extern char etext[], *curhbeg; int descrip, des2, ax,mode; extern int holesize; char tbuf[BUFSIZ]; long count, lseek(); pageseql(); pagsiz = Igtpgsz(); pagrnd = pagsiz - 1; #ifdef __NetBSD__ { /* Round the break up to a multiple of a page size */ int excess; excess = (long)sbrk(0) & pagrnd; if (excess > 0) sbrk(pagsiz - excess); } #endif /* dump mode is kept in decimal (which looks like octal in dmpmode) and is changeable via (sstatus dumpmode n) where n is 413 or 410 base 10 */ if(dmpmode == 413) mode = 0413; else if(dmpmode == 407) mode = 0407; else mode = 0410; workp = &work; workp->a_magic = mode; (and so on for much longer) Those structures aren't right & the workp-> pointers all give major complaints in GCC (dereferencing pointer to incomplete type) and it bombs out. My C is even rustier than I thought so it's driving me nuts trying to remember what's wrong. What I'm hoping is that someone can point me at is a good online reference or tool to old K&R C that I can hopefully restore my memories of what is going wrong in this and the other issues I'm sure will pop up. Thanks! William -- Live like you will never die, love like you've never been hurt, dance like no-one is watching. Alex White