ref: ef17043327d999101009f85aae72f77399db15ac
dir: /sys/src/cmd/pcc.c/
#include <u.h>
#include <libc.h>
typedef struct Objtype {
char *name;
char *cc;
char *ld;
char *o;
char *oname;
} Objtype;
Objtype objtype[] = {
{"spim", "0c", "0l", "0", "0.out"},
{"68000", "1c", "1l", "1", "1.out"},
{"68020", "2c", "2l", "2", "2.out"},
{"arm", "5c", "5l", "5", "5.out"},
{"amd64", "6c", "6l", "6", "6.out"},
{"386", "8c", "8l", "8", "8.out"},
{"power64", "9c", "9l", "9", "9.out"},
{"sparc", "kc", "kl", "k", "k.out"},
{"power", "qc", "ql", "q", "q.out"},
{"mips", "vc", "vl", "v", "v.out"},
};
enum {
Nobjs = (sizeof objtype)/(sizeof objtype[0]),
Maxlist = 500,
};
typedef struct List {
char *strings[Maxlist];
int n;
} List;
List srcs, objs, cpp, cc, ld, ldargs;
int cflag, vflag, Eflag, Pflag;
char *allos = "01245678kqv";
void append(List *, char *);
char *changeext(char *, char *);
void doexec(char *, List *);
void dopipe(char *, List *, char *, List *);
void fatal(char *);
Objtype *findoty(void);
void printlist(List *);
void
main(int argc, char *argv[])
{
Objtype *ot;
char *s, *suf, *ccpath;
char *oname;
int i, cppn, ccn, oflag;
oflag = 0;
ot = findoty();
oname = ot->oname;
append(&cpp, "cpp");
append(&cpp, "-D__STDC__=1"); /* ANSI says so */
append(&cpp, "-N"); /* turn off standard includes */
append(&cc, ot->cc);
append(&ld, ot->ld);
while(argc > 0) {
ARGBEGIN {
case '+':
append(&cpp, smprint("-%c", ARGC()));
break;
case 'c':
cflag = 1;
break;
case 'l':
append(&objs, smprint("/%s/lib/ape/lib%s.a", ot->name, ARGF()));
break;
case 'o':
oflag = 1;
oname = ARGF();
if(!oname)
fatal("no -o argument");
break;
case 'w':
case 'B':
case 'F':
case 'N':
case 'S':
case 'T':
case 'V':
append(&cc, smprint("-%c", ARGC()));
break;
case 's':
append(&cc, smprint("-s%s", ARGF()));
break;
case 'D':
case 'I':
case 'U':
append(&cpp, smprint("-%c%s", ARGC(), ARGF()));
break;
case 'v':
vflag = 1;
append(&ldargs, "-v");
break;
case 'P':
Pflag = 1;
cflag = 1;
break;
case 'E':
Eflag = 1;
cflag = 1;
break;
case 'p':
append(&ldargs, "-p");
break;
case 'a':
/* hacky look inside ARGBEGIN insides, to see if we have -aa */
if(*_args == 'a') {
append(&cc, "-aa");
_args++;
} else
append(&cc, "-a");
cflag = 1;
break;
default:
fprint(2, "pcc: flag -%c ignored\n", ARGC());
break;
} ARGEND
if(argc > 0) {
s = argv[0];
suf = utfrrune(s, '.');
if(suf) {
suf++;
if(strcmp(suf, "c") == 0) {
append(&srcs, s);
append(&objs, changeext(s, ot->o));
} else if(strcmp(suf, ot->o) == 0 ||
strcmp(suf, "o") == 0 ||
strcmp(suf, "a") == 0 ||
(suf[0] == 'a' && strcmp(suf+1, ot->o) == 0)) {
append(&objs, s);
} else if(utfrune(allos, suf[0]) != 0) {
fprint(2, "pcc: argument %s ignored: wrong architecture\n",
s);
}
}
}
}
if(objs.n == 0)
fatal("no files to compile or load");
ccpath = smprint("/bin/%s", ot->cc);
append(&cpp, smprint("-I/%s/include/ape", ot->name));
append(&cpp, "-I/sys/include/ape");
cppn = cpp.n;
ccn = cc.n;
for(i = 0; i < srcs.n; i++) {
append(&cpp, srcs.strings[i]);
if(Pflag)
append(&cpp, changeext(objs.strings[i], "i"));
if(Eflag || Pflag)
doexec("/bin/cpp", &cpp);
else {
append(&cc, "-o");
if(oflag && cflag)
append(&cc, oname);
else
append(&cc, changeext(srcs.strings[i], ot->o));
dopipe("/bin/cpp", &cpp, ccpath, &cc);
}
cpp.n = cppn;
cc.n = ccn;
}
if(!cflag) {
append(&ld, "-o");
append(&ld, oname);
for(i = 0; i < ldargs.n; i++)
append(&ld, ldargs.strings[i]);
for(i = 0; i < objs.n; i++)
append(&ld, objs.strings[i]);
append(&ld, smprint("/%s/lib/ape/libap.a", ot->name));
doexec(smprint("/bin/%s", ot->ld), &ld);
if(objs.n == 1){
/* prevent removal of a library */
if(strstr(objs.strings[0], ".a") == 0)
remove(objs.strings[0]);
}
}
exits(0);
}
void
append(List *l, char *s)
{
if(l->n >= Maxlist-1)
fatal("too many arguments");
l->strings[l->n++] = s;
l->strings[l->n] = 0;
}
void
doexec(char *c, List *a)
{
Waitmsg *w;
if(vflag) {
printlist(a);
fprint(2, "\n");
}
switch(fork()) {
case -1:
fatal("fork failed");
case 0:
exec(c, a->strings);
fatal("exec failed");
}
w = wait();
if(w == nil)
fatal("wait failed");
if(w->msg[0])
fatal(smprint("%s: %s", a->strings[0], w->msg));
free(w);
}
void
dopipe(char *c1, List *a1, char *c2, List *a2)
{
Waitmsg *w;
int pid1, got;
int fd[2];
if(vflag) {
printlist(a1);
fprint(2, " | ");
printlist(a2);
fprint(2, "\n");
}
if(pipe(fd) < 0)
fatal("pipe failed");
switch((pid1 = fork())) {
case -1:
fatal("fork failed");
case 0:
dup(fd[0], 0);
close(fd[0]);
close(fd[1]);
exec(c2, a2->strings);
fatal("exec failed");
}
switch(fork()) {
case -1:
fatal("fork failed");
case 0:
close(0);
dup(fd[1], 1);
close(fd[0]);
close(fd[1]);
exec(c1, a1->strings);
fatal("exec failed");
}
close(fd[0]);
close(fd[1]);
for(got = 0; got < 2; got++) {
w = wait();
if(w == nil)
fatal("wait failed");
if(w->msg[0])
fatal(smprint("%s: %s",
(w->pid == pid1) ? a1->strings[0] : a2->strings[0], w->msg));
free(w);
}
}
Objtype *
findoty(void)
{
char *o;
Objtype *oty;
o = getenv("objtype");
if(!o)
fatal("no $objtype in environment");
for(oty = objtype; oty < &objtype[Nobjs]; oty++)
if(strcmp(o, oty->name) == 0)
return oty;
fatal("unknown $objtype");
return 0; /* shut compiler up */
}
void
fatal(char *msg)
{
fprint(2, "pcc: %s\n", msg);
exits(msg);
}
/* src ends in .something; return copy of basename with .ext added */
char *
changeext(char *src, char *ext)
{
char *b, *e, *ans;
b = utfrrune(src, '/');
if(b)
b++;
else
b = src;
e = utfrrune(src, '.');
if(!e)
return 0;
*e = 0;
ans = smprint("%s.%s", b, ext);
*e = '.';
return ans;
}
void
printlist(List *l)
{
int i;
for(i = 0; i < l->n; i++) {
fprint(2, "%s", l->strings[i]);
if(i < l->n - 1)
fprint(2, " ");
}
}