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/*
* lcc [ option ]... [ file | -llib ]...
* front end for the ANSI C compiler
*/
static char rcsid[] = "$Id$";
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>
#include <signal.h>
#ifndef TEMPDIR
#define TEMPDIR "/tmp"
#endif
typedef struct list *List;
struct list { /* circular list nodes: */
char *str; /* option or file name */
List link; /* next list element */
};
static void *alloc(int);
static List append(char *,List);
extern char *basepath(char *);
static int callsys(char *[]);
extern char *concat(char *, char *);
static int compile(char *, char *);
static void compose(char *[], List, List, List);
static void error(char *, char *);
static char *exists(char *);
static char *first(char *);
static int filename(char *, char *);
static List find(char *, List);
static void help(void);
static void initinputs(void);
static void interrupt(int);
static void opt(char *);
static List path2list(const char *);
extern int main(int, char *[]);
extern char *replace(const char *, int, int);
static void rm(List);
extern char *strsave(const char *);
extern char *stringf(const char *, ...);
extern int suffix(char *, char *[], int);
extern char *tempname(char *);
extern int access(char *, int);
extern int getpid(void);
extern char *cpp[], *include[], *com[], *as[],*ld[], inputs[], *suffixes[];
extern int option(char *);
static int errcnt; /* number of errors */
static int Eflag; /* -E specified */
static int Sflag; /* -S specified */
static int cflag; /* -c specified */
static int verbose; /* incremented for each -v */
static List llist[2]; /* loader files, flags */
static List alist; /* assembler flags */
static List clist; /* compiler flags */
static List plist; /* preprocessor flags */
static List ilist; /* list of additional includes from LCCINPUTS */
static List rmlist; /* list of files to remove */
static char *outfile; /* ld output file or -[cS] object file */
static int ac; /* argument count */
static char **av; /* argument vector */
char *tempdir = TEMPDIR; /* directory for temporary files */
static char *progname;
static List lccinputs; /* list of input directories */
main(int argc, char *argv[]) {
int i, j, nf;
progname = argv[0];
ac = argc + 50;
av = alloc(ac*sizeof(char *));
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, interrupt);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, interrupt);
#ifdef SIGHUP
if (signal(SIGHUP, SIG_IGN) != SIG_IGN)
signal(SIGHUP, interrupt);
#endif
if (getenv("TMP"))
tempdir = getenv("TMP");
else if (getenv("TEMP"))
tempdir = getenv("TEMP");
else if (getenv("TMPDIR"))
tempdir = getenv("TMPDIR");
assert(tempdir);
i = strlen(tempdir);
for (; i > 0 && tempdir[i-1] == '/' || tempdir[i-1] == '\\'; i--)
tempdir[i-1] = '\0';
if (argc <= 1) {
help();
exit(0);
}
plist = append("-D__LCC__", 0);
initinputs();
if (getenv("LCCDIR"))
option(stringf("-lccdir=%s", getenv("LCCDIR")));
for (nf = 0, i = j = 1; i < argc; i++) {
if (strcmp(argv[i], "-o") == 0) {
if (++i < argc) {
if (suffix(argv[i], suffixes, 2) >= 0) {
error("-o would overwrite %s", argv[i]);
exit(8);
}
outfile = argv[i];
continue;
} else {
error("unrecognized option `%s'", argv[i-1]);
exit(8);
}
} else if (strcmp(argv[i], "-target") == 0) {
if (argv[i+1] && *argv[i+1] != '-')
i++;
continue;
} else if (*argv[i] == '-' && argv[i][1] != 'l') {
opt(argv[i]);
continue;
} else if (*argv[i] != '-' && suffix(argv[i], suffixes, 3) >= 0)
nf++;
argv[j++] = argv[i];
}
if ((cflag || Sflag) && outfile && nf != 1) {
fprintf(stderr, "%s: -o %s ignored\n", progname, outfile);
outfile = 0;
}
argv[j] = 0;
for (i = 0; include[i]; i++)
plist = append(include[i], plist);
if (ilist) {
List b = ilist;
do {
b = b->link;
plist = append(b->str, plist);
} while (b != ilist);
}
ilist = 0;
for (i = 1; argv[i]; i++)
if (strcmp(argv[i], "-l") == 0 && argv[i+1] && *argv[i+1] != '-') { /* -l file */
llist[1] = append(argv[i++], llist[1]);
llist[1] = append(argv[i], llist[1]);
} else if (*argv[i] == '-')
opt(argv[i]);
else {
char *name = exists(argv[i]);
if (name) {
if (strcmp(name, argv[i]) != 0
|| nf > 1 && suffix(name, suffixes, 3) >= 0)
fprintf(stderr, "%s:\n", name);
filename(name, 0);
} else
error("can't find `%s'", argv[i]);
}
if (errcnt == 0 && !Eflag && !Sflag && !cflag && llist[1]) {
compose(ld, llist[0], llist[1],
append(outfile ? outfile : concat("a", first(suffixes[4])), 0));
if (callsys(av))
errcnt++;
}
rm(rmlist);
return errcnt ? EXIT_FAILURE : EXIT_SUCCESS;
}
/* alloc - allocate n bytes or die */
static void *alloc(int n) {
static char *avail, *limit;
n = (n + sizeof(char *) - 1)&~(sizeof(char *) - 1);
if (n >= limit - avail) {
avail = malloc(n + 4*1024);
assert(avail);
limit = avail + n + 4*1024;
}
avail += n;
return avail - n;
}
/* append - append a node with string str onto list, return new list */
static List append(char *str, List list) {
List p = alloc(sizeof *p);
p->str = str;
if (list) {
p->link = list->link;
list->link = p;
} else
p->link = p;
return p;
}
/* basepath - return base name for name, e.g. /usr/drh/foo.c => foo */
char *basepath(char *name) {
char *s, *b, *t = 0;
for (b = s = name; *s; s++)
if (*s == '/' || *s == '\\') {
b = s + 1;
t = 0;
} else if (*s == '.')
t = s;
s = strsave(b);
if (t)
s[t-b] = 0;
return s;
}
#ifdef WIN32
#include <process.h>
#else
#define _P_WAIT 0
extern int fork(void);
extern int wait(int *);
extern void execv(const char *, char *[]);
static int _spawnvp(int mode, const char *cmdname, const char *const argv[]) {
int pid, n, status;
switch (pid = fork()) {
case -1:
fprintf(stderr, "%s: no more processes\n", progname);
return 100;
case 0:
execv(cmdname, (char **)argv);
fprintf(stderr, "%s: ", progname);
perror(cmdname);
fflush(stdout);
exit(100);
}
while ((n = wait(&status)) != pid && n != -1)
;
if (n == -1)
status = -1;
if (status&0377) {
fprintf(stderr, "%s: fatal error in %s\n", progname, cmdname);
status |= 0400;
}
return (status>>8)&0377;
}
#endif
/* callsys - execute the command described by av[0...], return status */
static int callsys(char **av) {
int i, status = 0;
static char **argv;
static int argc;
for (i = 0; av[i] != NULL; i++)
;
if (i + 1 > argc) {
argc = i + 1;
if (argv == NULL)
argv = malloc(argc*sizeof *argv);
else
argv = realloc(argv, argc*sizeof *argv);
assert(argv);
}
for (i = 0; status == 0 && av[i] != NULL; ) {
int j = 0;
char *s;
for ( ; av[i] != NULL && (s = strchr(av[i], '\n')) == NULL; i++)
argv[j++] = av[i];
if (s != NULL) {
if (s > av[i])
argv[j++] = stringf("%.*s", s - av[i], av[i]);
if (s[1] != '\0')
av[i] = s + 1;
else
i++;
}
argv[j] = NULL;
if (verbose > 0) {
int k;
fprintf(stderr, "%s", argv[0]);
for (k = 1; argv[k] != NULL; k++)
fprintf(stderr, " %s", argv[k]);
fprintf(stderr, "\n");
}
if (verbose < 2)
status = _spawnvp(_P_WAIT, argv[0], (const char * const *)argv);
if (status == -1) {
fprintf(stderr, "%s: ", progname);
perror(argv[0]);
}
}
return status;
}
/* concat - return concatenation of strings s1 and s2 */
char *concat(char *s1, char *s2) {
int n = strlen(s1);
char *s = alloc(n + strlen(s2) + 1);
strcpy(s, s1);
strcpy(s + n, s2);
return s;
}
/* compile - compile src into dst, return status */
static int compile(char *src, char *dst) {
compose(com, clist, append(src, 0), append(dst, 0));
return callsys(av);
}
/* compose - compose cmd into av substituting a, b, c for $1, $2, $3, resp. */
static void compose(char *cmd[], List a, List b, List c) {
int i, j;
List lists[3];
lists[0] = a;
lists[1] = b;
lists[2] = c;
for (i = j = 0; cmd[i]; i++) {
char *s = strchr(cmd[i], '$');
if (s && isdigit(s[1])) {
int k = s[1] - '0';
assert(k >=1 && k <= 3);
if (b = lists[k-1]) {
b = b->link;
av[j] = alloc(strlen(cmd[i]) + strlen(b->str) - 1);
strncpy(av[j], cmd[i], s - cmd[i]);
av[j][s-cmd[i]] = '\0';
strcat(av[j], b->str);
strcat(av[j++], s + 2);
while (b != lists[k-1]) {
b = b->link;
assert(j < ac);
av[j++] = b->str;
};
}
} else if (*cmd[i]) {
assert(j < ac);
av[j++] = cmd[i];
}
}
av[j] = NULL;
}
/* error - issue error msg according to fmt, bump error count */
static void error(char *fmt, char *msg) {
fprintf(stderr, "%s: ", progname);
fprintf(stderr, fmt, msg);
fprintf(stderr, "\n");
errcnt++;
}
/* exists - if `name' readable return its path name or return null */
static char *exists(char *name) {
List b;
if ( (name[0] == '/' || name[0] == '\\' || name[2] == ':')
&& access(name, 4) == 0)
return name;
if (!(name[0] == '/' || name[0] == '\\' || name[2] == ':')
&& (b = lccinputs))
do {
b = b->link;
if (b->str[0]) {
char buf[1024];
sprintf(buf, "%s/%s", b->str, name);
if (access(buf, 4) == 0)
return strsave(buf);
} else if (access(name, 4) == 0)
return name;
} while (b != lccinputs);
if (verbose > 1)
return name;
return 0;
}
/* first - return first component in semicolon separated list */
static char *first(char *list) {
char *s = strchr(list, ';');
if (s) {
char buf[1024];
strncpy(buf, list, s-list);
buf[s-list] = '\0';
return strsave(buf);
} else
return list;
}
/* filename - process file name argument `name', return status */
static int filename(char *name, char *base) {
int status = 0;
static char *stemp, *itemp;
if (base == 0)
base = basepath(name);
switch (suffix(name, suffixes, 4)) {
case 0: /* C source files */
compose(cpp, plist, append(name, 0), 0);
if (Eflag) {
status = callsys(av);
break;
}
if (itemp == NULL)
itemp = tempname(first(suffixes[1]));
compose(cpp, plist, append(name, 0), append(itemp, 0));
status = callsys(av);
if (status == 0)
return filename(itemp, base);
break;
case 1: /* preprocessed source files */
if (Eflag)
break;
if (Sflag)
status = compile(name, outfile ? outfile : concat(base, first(suffixes[2])));
else if ((status = compile(name, stemp?stemp:(stemp=tempname(first(suffixes[2]))))) == 0)
return filename(stemp, base);
break;
case 2: /* assembly language files */
if (Eflag)
break;
if (!Sflag) {
char *ofile;
if (cflag && outfile)
ofile = outfile;
else if (cflag)
ofile = concat(base, first(suffixes[3]));
else
ofile = tempname(first(suffixes[3]));
compose(as, alist, append(name, 0), append(ofile, 0));
status = callsys(av);
if (!find(ofile, llist[1]))
llist[1] = append(ofile, llist[1]);
}
break;
case 3: /* object files */
if (!find(name, llist[1]))
llist[1] = append(name, llist[1]);
break;
default:
if (Eflag) {
compose(cpp, plist, append(name, 0), 0);
status = callsys(av);
}
llist[1] = append(name, llist[1]);
break;
}
if (status)
errcnt++;
return status;
}
/* find - find 1st occurrence of str in list, return list node or 0 */
static List find(char *str, List list) {
List b;
if (b = list)
do {
if (strcmp(str, b->str) == 0)
return b;
} while ((b = b->link) != list);
return 0;
}
/* help - print help message */
static void help(void) {
static char *msgs[] = {
"", " [ option | file ]...\n",
" except for -l, options are processed left-to-right before files\n",
" unrecognized options are taken to be linker options\n",
"-A warn about nonANSI usage; 2nd -A warns more\n",
"-b emit expression-level profiling code; see bprint(1)\n",
#ifdef sparc
"-Bstatic -Bdynamic specify static or dynamic libraries\n",
#endif
"-Bdir/ use the compiler named `dir/rcc'\n",
"-c compile only\n",
"-dn set switch statement density to `n'\n",
"-Dname -Dname=def define the preprocessor symbol `name'\n",
"-E run only the preprocessor on the named C programs and unsuffixed files\n",
"-g produce symbol table information for debuggers\n",
"-help or -? print this message on standard error\n",
"-Idir add `dir' to the beginning of the list of #include directories\n",
"-lx search library `x'\n",
"-M emit makefile dependencies; implies -E\n",
"-N do not search the standard directories for #include files\n",
"-n emit code to check for dereferencing zero pointers\n",
"-O is ignored\n",
"-o file leave the output in `file'\n",
"-P print ANSI-style declarations for globals on standard error\n",
"-p -pg emit profiling code; see prof(1) and gprof(1)\n",
"-S compile to assembly language\n",
"-static specify static libraries (default is dynamic)\n",
"-dynamic specify dynamically linked libraries\n",
"-t -tname emit function tracing calls to printf or to `name'\n",
"-target name is ignored\n",
"-tempdir=dir place temporary files in `dir/'", "\n"
"-Uname undefine the preprocessor symbol `name'\n",
"-v show commands as they are executed; 2nd -v suppresses execution\n",
"-w suppress warnings\n",
"-Woarg specify system-specific `arg'\n",
"-W[pfal]arg pass `arg' to the preprocessor, compiler, assembler, or linker\n",
0 };
int i;
char *s;
msgs[0] = progname;
for (i = 0; msgs[i]; i++) {
fprintf(stderr, "%s", msgs[i]);
if (strncmp("-tempdir", msgs[i], 8) == 0 && tempdir)
fprintf(stderr, "; default=%s", tempdir);
}
#define xx(v) if (s = getenv(#v)) fprintf(stderr, #v "=%s\n", s)
xx(LCCINPUTS);
xx(LCCDIR);
#ifdef WIN32
xx(include);
xx(lib);
#endif
#undef xx
}
/* initinputs - if LCCINPUTS or include is defined, use them to initialize various lists */
static void initinputs(void) {
char *s = getenv("LCCINPUTS");
List list, b;
if (s == 0 && (s = inputs)[0] == 0)
s = ".";
if (s) {
lccinputs = path2list(s);
if (b = lccinputs)
do {
b = b->link;
if (strcmp(b->str, ".") != 0) {
ilist = append(concat("-I", b->str), ilist);
if (strstr(com[1], "win32") == NULL)
llist[0] = append(concat("-L", b->str), llist[0]);
} else
b->str = "";
} while (b != lccinputs);
}
#ifdef WIN32
if (list = b = path2list(getenv("include")))
do {
int n;
b = b->link;
n = strlen(b->str);
if (b->str[n-1] == '\\')
b->str[n-1] = '/';
ilist = append(stringf("-I\"%s\"", b->str), ilist);
} while (b != list);
#endif
}
/* interrupt - catch interrupt signals */
static void interrupt(int n) {
rm(rmlist);
exit(n = 100);
}
/* opt - process option in arg */
static void opt(char *arg) {
switch (arg[1]) { /* multi-character options */
case 'W': /* -Wxarg */
if (arg[2] && arg[3])
switch (arg[2]) {
case 'o':
if (option(&arg[3]))
return;
break;
case 'p':
plist = append(&arg[3], plist);
return;
case 'f':
if (strcmp(&arg[3], "-C") == 0 && !option("-b"))
break; /* -C requires that -b is supported */
clist = append(&arg[3], clist);
if (strcmp(&arg[3], "-unsigned_char=1") == 0) {
plist = append("-D__CHAR_UNSIGNED__", plist);
plist = append("-U_CHAR_IS_SIGNED", plist);
}
#define xx(name,k) \
if (strcmp(&arg[3], "-wchar_t=" #name) == 0) \
plist = append("-D_WCHAR_T_SIZE=" #k, plist);
xx(unsigned_char,1)
xx(unsigned_short,2)
xx(unsigned_int,4)
#undef xx
return;
case 'a':
alist = append(&arg[3], alist);
return;
case 'l':
llist[0] = append(&arg[3], llist[0]);
return;
}
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
case 'd': /* -dn -dynamic */
if (strcmp(arg, "-dynamic") == 0) {
if (!option(arg))
fprintf(stderr, "%s: %s ignored\n", progname, arg);
} else {
arg[1] = 's';
clist = append(arg, clist);
}
return;
case 't': /* -t -tname -tempdir=dir */
if (strncmp(arg, "-tempdir=", 9) == 0)
tempdir = arg + 9;
else
clist = append(arg, clist);
return;
case 'p': /* -p -pg */
if (option(arg))
clist = append(arg, clist);
else
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
case 'D': /* -Dname -Dname=def */
case 'U': /* -Uname */
case 'I': /* -Idir */
plist = append(arg, plist);
return;
case 'B': /* -Bdir -Bstatic -Bdynamic */
#ifdef sparc
if (strcmp(arg, "-Bstatic") == 0 || strcmp(arg, "-Bdynamic") == 0)
llist[1] = append(arg, llist[1]);
else
#endif
{
static char *path;
if (path)
error("-B overwrites earlier option", 0);
path = arg + 2;
if (strstr(com[1], "win32") != NULL)
com[0] = concat(replace(path, '/', '\\'), concat("rcc", first(suffixes[4])));
else
com[0] = concat(path, "rcc");
if (path[0] == 0)
error("missing directory in -B option", 0);
}
return;
case 'h':
if (strcmp(arg, "-help") == 0) {
static int printed = 0;
case '?':
if (!printed)
help();
printed = 1;
return;
}
break;
case 's':
if (strcmp(arg, "-static") == 0) {
if (!option(arg))
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
}
break;
}
if (arg[2] == 0)
switch (arg[1]) { /* single-character options */
case 'S':
Sflag++;
return;
case 'O':
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
case 'A': case 'n': case 'w': case 'P':
clist = append(arg, clist);
return;
case 'g': case 'b':
if (option(arg))
clist = append(arg[1] == 'g' ? "-g2" : arg, clist);
else
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
case 'G':
if (option(arg)) {
clist = append("-g3", clist);
llist[0] = append("-N", llist[0]);
} else
fprintf(stderr, "%s: %s ignored\n", progname, arg);
return;
case 'E':
Eflag++;
return;
case 'c':
cflag++;
return;
case 'M':
Eflag++; /* -M implies -E */
plist = append(arg, plist);
return;
case 'N':
if (strcmp(basepath(cpp[0]), "gcc-cpp") == 0)
plist = append("-nostdinc", plist);
include[0] = 0;
ilist = 0;
return;
case 'v':
if (verbose++ == 0) {
if (strcmp(basepath(cpp[0]), "gcc-cpp") == 0)
plist = append(arg, plist);
clist = append(arg, clist);
fprintf(stderr, "%s %s\n", progname, rcsid);
}
return;
}
if (cflag || Sflag || Eflag)
fprintf(stderr, "%s: %s ignored\n", progname, arg);
else
llist[1] = append(arg, llist[1]);
}
/* path2list - convert a colon- or semicolon-separated list to a list */
static List path2list(const char *path) {
List list = NULL;
char sep = ':';
if (path == NULL)
return NULL;
if (strchr(path, ';'))
sep = ';';
while (*path) {
char *p, buf[512];
if (p = strchr(path, sep)) {
assert(p - path < sizeof buf);
strncpy(buf, path, p - path);
buf[p-path] = '\0';
} else {
assert(strlen(path) < sizeof buf);
strcpy(buf, path);
}
if (!find(buf, list))
list = append(strsave(buf), list);
if (p == 0)
break;
path = p + 1;
}
return list;
}
/* replace - copy str, then replace occurrences of from with to, return the copy */
char *replace(const char *str, int from, int to) {
char *s = strsave(str), *p = s;
for ( ; (p = strchr(p, from)) != NULL; p++)
*p = to;
return s;
}
/* rm - remove files in list */
static void rm(List list) {
if (list) {
List b = list;
if (verbose)
fprintf(stderr, "rm");
do {
if (verbose)
fprintf(stderr, " %s", b->str);
if (verbose < 2)
remove(b->str);
} while ((b = b->link) != list);
if (verbose)
fprintf(stderr, "\n");
}
}
/* strsave - return a saved copy of string str */
char *strsave(const char *str) {
return strcpy(alloc(strlen(str)+1), str);
}
/* stringf - format and return a string */
char *stringf(const char *fmt, ...) {
char buf[1024];
va_list ap;
va_start(ap, fmt);
(void)vsprintf(buf, fmt, ap);
va_end(ap);
return strsave(buf);
}
/* suffix - if one of tails[0..n-1] holds a proper suffix of name, return its index */
int suffix(char *name, char *tails[], int n) {
int i, len = strlen(name);
for (i = 0; i < n; i++) {
char *s = tails[i], *t;
for ( ; t = strchr(s, ';'); s = t + 1) {
int m = t - s;
if (len > m && strncmp(&name[len-m], s, m) == 0)
return i;
}
if (*s) {
int m = strlen(s);
if (len > m && strncmp(&name[len-m], s, m) == 0)
return i;
}
}
return -1;
}
/* tempname - generate a temporary file name in tempdir with given suffix */
char *tempname(char *suffix) {
static int n;
char *name = stringf("%s/lcc%d%d%s", tempdir, getpid(), n++, suffix);
if (strstr(com[1], "win32") != NULL)
name = replace(name, '/', '\\');
rmlist = append(name, rmlist);
return name;
}