ref: 52cacba37c6f3a125ef931afa4b9c2cdb7438fef
dir: /sys/src/ape/cmd/cc.c/
#include <u.h>
#include <libc.h>
/*
POSIX standard c89
standard options: -c, -D name[=val], -E (preprocess to stdout),
-g, -L dir, -o outfile, -O, -s, -U name
(and operands can have -l lib interspersed)
nonstandard but specified options: -S (assembly language left in .s),
-Wx,arg1[,arg2...] (pass arg(s) to phase x, where x is p (cpp)
0 (compiler), or l (loader)
nonstandard options: -v (echo real commands to stdout as they execute)
-A: turn on ANSI prototype warnings
*/
typedef struct Objtype {
char *name;
char *cc;
char *ld;
char *o;
} Objtype;
Objtype objtype[] = {
{"68020", "2c", "2l", "2"},
{"arm", "5c", "5l", "5"},
{"amd64", "6c", "6l", "6"},
{"alpha", "7c", "7l", "7"},
{"386", "8c", "8l", "8"},
{"sparc", "kc", "kl", "k"},
{"power", "qc", "ql", "q"},
{"mips", "vc", "vl", "v"},
};
enum {
Nobjs = (sizeof objtype)/(sizeof objtype[0]),
Maxlist = 2000,
};
typedef struct List {
char *strings[Maxlist];
int n;
} List;
List srcs, objs, cpp, cc, ld, ldargs, srchlibs;
int cflag, vflag, Eflag, Sflag, Aflag;
char *allos = "2678kqv";
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 *);
char *searchlib(char *, char*);
void
main(int argc, char *argv[])
{
char *s, *suf, *ccpath, *lib;
char *oname;
int haveoname = 0;
int i, cppn, ccn;
Objtype *ot;
ot = findoty();
oname = "a.out";
append(&cpp, "cpp");
append(&cpp, "-D__STDC__=1"); /* ANSI says so */
append(&cpp, "-D_POSIX_SOURCE=");
append(&cpp, "-N"); /* turn off standard includes */
append(&cc, ot->cc);
append(&ld, ot->ld);
append(&srchlibs, smprint("/%s/lib/ape", ot->name));
while(argc > 0) {
ARGBEGIN {
case 'c':
cflag = 1;
break;
case 'l':
lib = searchlib(ARGF(), ot->name);
if(!lib)
fprint(2, "cc: can't find library for -l\n");
else
append(&objs, lib);
break;
case 'o':
oname = ARGF();
haveoname = 1;
if(!oname)
fatal("cc: no -o argument");
break;
case 'D':
case 'I':
case 'U':
append(&cpp, smprint("-%c%s", ARGC(), ARGF()));
break;
case 'E':
Eflag = 1;
cflag = 1;
break;
case 's':
case 'g':
break;
case 'L':
lib = ARGF();
if(!lib)
fprint(2, "cc: no -L argument\n");
else
append(&srchlibs, lib);
break;
case 'N':
case 'T':
case 'w':
append(&cc, smprint("-%c", ARGC()));
break;
case 'O':
break;
case 'W':
s = ARGF();
if(s && s[1]==',') {
switch (s[0]) {
case 'p':
append(&cpp, s+2);
break;
case '0':
append(&cc, s+2);
break;
case 'l':
append(&ldargs, s+2);
break;
default:
fprint(2, "cc: pass letter after -W should be one of p0l; ignored\n");
}
} else
fprint(2, "cc: bad option after -W; ignored\n");
break;
case 'v':
vflag = 1;
append(&ldargs, "-v");
break;
case 'A':
Aflag = 1;
break;
case 'S':
Sflag = 1;
break;
default:
fprint(2, "cc: flag -%c ignored\n", ARGC());
break;
} ARGEND
if(!Aflag) {
append(&cc, "-J"); /* old/new decl mixture hack */
append(&cc, "-B"); /* turn off non-prototype warnings */
}
if(argc > 0) {
s = argv[0];
suf = utfrrune(s, '.');
if(suf) {
suf++;
if(strcmp(suf, "c") == 0) {
append(&srcs, s);
append(&objs, changeext(s, "o"));
} else if(strcmp(suf, "o") == 0 ||
strcmp(suf, ot->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, "cc: 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(Eflag)
doexec("/bin/cpp", &cpp);
else {
if(Sflag)
append(&cc, "-S");
else {
append(&cc, "-o");
if (haveoname && cflag)
append(&cc, oname);
else
append(&cc, changeext(srcs.strings[i], "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)
remove(objs.strings[0]);
}
exits(0);
}
char *
searchlib(char *s, char *objtype)
{
char *l;
int i;
if(!s)
return 0;
for(i = srchlibs.n-1; i>=0; i--) {
l = smprint("%s/lib%s.a", srchlibs.strings[i], s);
if(access(l, 0) >= 0)
return l;
}
if(s[1] == 0)
switch(s[0]) {
case 'c':
l = smprint("/%s/lib/ape/libap.a", objtype);
break;
case 'm':
l = smprint("/%s/lib/ape/libap.a", objtype);
break;
case 'l':
l = smprint("/%s/lib/ape/libl.a", objtype);
break;
case 'y':
l = smprint("/%s/lib/ape/liby.a", objtype);
break;
default:
l = 0;
}
else
l = 0;
return l;
}
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");
}
if((w = wait()) == 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++) {
if((w = wait()) == 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, "cc: %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, " ");
}
}