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/* G++ preliminary semantic processing for the compiler driver.
Copyright (C) 1993, 1994 Free Software Foundation, Inc.
Contributed by Brendan Kehoe (brendan@cygnus.com).
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This program is a wrapper to the main `gcc' driver. For GNU C++,
we need to do two special things: a) append `-lg++' in situations
where it's appropriate, to link in libg++, and b) add `-xc++'..`-xnone'
around file arguments named `foo.c' or `foo.i'. So, we do all of
this semantic processing then just exec gcc with the new argument
list.
We used to do all of this in a small shell script, but many users
found the performance of this as a shell script to be unacceptable.
In situations where your PATH has a lot of NFS-mounted directories,
using a script that runs sed and other things would be a nasty
performance hit. With this program, we never search the PATH at all. */
#include "config.h"
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <stdio.h>
#include <sys/types.h>
#include <sys/file.h> /* May get R_OK, etc. on some systems. */
/* Defined to the name of the compiler; if using a cross compiler, the
Makefile should compile this file with the proper name
(e.g., "i386-aout-gcc"). */
#ifndef GCC_NAME
#define GCC_NAME "gcc"
#endif
/* This bit is set if we saw a `-xfoo' language specification. */
#define LANGSPEC (1<<1)
/* This bit is set if they did `-lm' or `-lmath'. */
#define MATHLIB (1<<2)
/* On MSDOS, write temp files in current dir
because there's no place else we can expect to use. */
#ifdef __MSDOS__
#ifndef P_tmpdir
#define P_tmpdir "."
#endif
#ifndef R_OK
#define R_OK 4
#define W_OK 2
#define X_OK 1
#endif
#endif
#ifndef VPROTO
#ifdef __STDC__
#define PVPROTO(ARGS) ARGS
#define VPROTO(ARGS) ARGS
#define VA_START(va_list,var) va_start(va_list,var)
#else
#define PVPROTO(ARGS) ()
#define VPROTO(ARGS) (va_alist) va_dcl
#define VA_START(va_list,var) va_start(va_list)
#endif
#endif
extern int errno, sys_nerr;
#if defined(bsd4_4) || defined(__NetBSD__)
extern const char *const sys_errlist[];
#else
extern char *sys_errlist[];
#endif
/* Name with which this program was invoked. */
static char *programname;
#ifdef HAVE_VPRINTF
/* Output an error message and exit */
static void
fatal VPROTO((char *format, ...))
{
#ifndef __STDC__
char *format;
#endif
va_list ap;
VA_START (ap, format);
#ifndef __STDC__
format = va_arg (ap, char*);
#endif
fprintf (stderr, "%s: ", programname);
vfprintf (stderr, format, ap);
va_end (ap);
fprintf (stderr, "\n");
#if 0
/* XXX Not needed for g++ driver. */
delete_temp_files ();
#endif
exit (1);
}
static void
error VPROTO((char *format, ...))
{
#ifndef __STDC__
char *format;
#endif
va_list ap;
VA_START (ap, format);
#ifndef __STDC__
format = va_arg (ap, char*);
#endif
fprintf (stderr, "%s: ", programname);
vfprintf (stderr, format, ap);
va_end (ap);
fprintf (stderr, "\n");
}
#else /* not HAVE_VPRINTF */
static void
error (msg, arg1, arg2)
char *msg, *arg1, *arg2;
{
fprintf (stderr, "%s: ", programname);
fprintf (stderr, msg, arg1, arg2);
fprintf (stderr, "\n");
}
static void
fatal (msg, arg1, arg2)
char *msg, *arg1, *arg2;
{
error (msg, arg1, arg2);
#if 0
/* XXX Not needed for g++ driver. */
delete_temp_files ();
#endif
exit (1);
}
#endif /* not HAVE_VPRINTF */
/* More 'friendly' abort that prints the line and file.
config.h can #define abort fancy_abort if you like that sort of thing. */
void
fancy_abort ()
{
fatal ("Internal g++ abort.");
}
char *
xmalloc (size)
unsigned size;
{
register char *value = (char *) malloc (size);
if (value == 0)
fatal ("virtual memory exhausted");
return value;
}
/* Return a newly-allocated string whose contents concatenate those
of s1, s2, s3. */
static char *
concat (s1, s2, s3)
char *s1, *s2, *s3;
{
int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
char *result = xmalloc (len1 + len2 + len3 + 1);
strcpy (result, s1);
strcpy (result + len1, s2);
strcpy (result + len1 + len2, s3);
*(result + len1 + len2 + len3) = 0;
return result;
}
static void
pfatal_with_name (name)
char *name;
{
char *s;
if (errno < sys_nerr)
s = concat ("%s: ", sys_errlist[errno], "");
else
s = "cannot open %s";
fatal (s, name);
}
#ifdef __MSDOS__
/* This is the common prefix we use to make temp file names. */
char *temp_filename;
/* Length of the prefix. */
int temp_filename_length;
/* Compute a string to use as the base of all temporary file names. */
static char *
choose_temp_base_try (try, base)
char *try;
char *base;
{
char *rv;
if (base)
rv = base;
else if (try == (char *)0)
rv = 0;
else if (access (try, R_OK | W_OK) != 0)
rv = 0;
else
rv = try;
return rv;
}
static void
choose_temp_base ()
{
char *base = 0;
int len;
base = choose_temp_base_try (getenv ("TMPDIR"), base);
base = choose_temp_base_try (getenv ("TMP"), base);
base = choose_temp_base_try (getenv ("TEMP"), base);
#ifdef P_tmpdir
base = choose_temp_base_try (P_tmpdir, base);
#endif
base = choose_temp_base_try ("/usr/tmp", base);
base = choose_temp_base_try ("/tmp", base);
/* If all else fails, use the current directory! */
if (base == (char *)0)
base = "./";
len = strlen (base);
temp_filename = xmalloc (len + sizeof("/ccXXXXXX"));
strcpy (temp_filename, base);
if (len > 0 && temp_filename[len-1] != '/')
temp_filename[len++] = '/';
strcpy (temp_filename + len, "ccXXXXXX");
mktemp (temp_filename);
temp_filename_length = strlen (temp_filename);
if (temp_filename_length == 0)
abort ();
}
static void
perror_exec (name)
char *name;
{
char *s;
if (errno < sys_nerr)
s = concat ("installation problem, cannot exec %s: ",
sys_errlist[errno], "");
else
s = "installation problem, cannot exec %s";
error (s, name);
}
/* This is almost exactly what's in gcc.c:pexecute for MSDOS. */
void
run_dos (program, argv)
char *program;
char *argv[];
{
char *scmd, *rf;
FILE *argfile;
int i;
choose_temp_base (); /* not in gcc.c */
scmd = (char *) malloc (strlen (program) + strlen (temp_filename) + 10);
rf = scmd + strlen (program) + 6;
sprintf (scmd, "%s.exe @%s.gp", program, temp_filename);
argfile = fopen (rf, "w");
if (argfile == 0)
pfatal_with_name (rf);
for (i=1; argv[i]; i++)
{
char *cp;
for (cp = argv[i]; *cp; cp++)
{
if (*cp == '"' || *cp == '\'' || *cp == '\\' || isspace (*cp))
fputc ('\\', argfile);
fputc (*cp, argfile);
}
fputc ('\n', argfile);
}
fclose (argfile);
i = system (scmd);
remove (rf);
if (i == -1)
perror_exec (program);
}
#endif /* __MSDOS__ */
int
main (argc, argv)
int argc;
char **argv;
{
register int i, j = 0;
register char *p;
int verbose = 0;
/* This will be NULL if we encounter a situation where we should not
link in libg++. */
char *library = "-lg++";
/* Used to track options that take arguments, so we don't go wrapping
those with -xc++/-xnone. */
char *quote = NULL;
/* The new argument list will be contained in this. */
char **arglist;
/* The name of the compiler we will want to run---by default, it
will be the definition of `GCC_NAME', e.g., `gcc'. */
char *gcc = GCC_NAME;
/* Non-zero if we saw a `-xfoo' language specification on the
command line. Used to avoid adding our own -xc++ if the user
already gave a language for the file. */
int saw_speclang = 0;
/* Non-zero if we saw `-lm' or `-lmath' on the command line. */
int saw_math = 0;
/* The number of arguments being added to what's in argv. By
default it's one new argument (adding `-lg++'). We use this
to track the number of times we've inserted -xc++/-xnone as well. */
int added = 1;
/* An array used to flag each argument that needs a bit set for
LANGSPEC or MATHLIB. */
int *args;
p = argv[0] + strlen (argv[0]);
while (p != argv[0] && p[-1] != '/')
--p;
programname = p;
if (argc == 1)
fatal ("No input files specified.\n");
#ifndef __MSDOS__
/* We do a little magic to find out where the main gcc executable
is. If they ran us as /usr/local/bin/g++, then we will look
for /usr/local/bin/gcc; similarly, if they just ran us as `g++',
we'll just look for `gcc'. */
if (p != argv[0])
{
*--p = '\0';
gcc = (char *) malloc ((strlen (argv[0]) + 1 + strlen (GCC_NAME) + 1)
* sizeof (char));
sprintf (gcc, "%s/%s", argv[0], GCC_NAME);
}
#endif
args = (int *) malloc (argc * sizeof (int));
bzero (args, argc * sizeof (int));
for (i = 1; i < argc; i++)
{
/* If the previous option took an argument, we swallow it here. */
if (quote)
{
quote = NULL;
continue;
}
if (argv[i][0] == '\0' || argv[i][1] == '\0')
continue;
if (argv[i][0] == '-')
{
if (strcmp (argv[i], "-nostdlib") == 0)
{
added--;
library = NULL;
}
else if (strcmp (argv[i], "-lm") == 0
|| strcmp (argv[i], "-lmath") == 0)
args[i] |= MATHLIB;
else if (strcmp (argv[i], "-v") == 0)
{
verbose = 1;
if (argc == 2)
{
/* If they only gave us `-v', don't try to link
in libg++. */
added--;
library = NULL;
}
}
else if (strncmp (argv[i], "-x", 2) == 0)
saw_speclang = 1;
else if (((argv[i][2] == '\0'
&& (char *)strchr ("bBVDUoeTuIYmLiA", argv[i][1]) != NULL)
|| strcmp (argv[i], "-Tdata") == 0))
quote = argv[i];
else if (((argv[i][2] == '\0'
&& (char *) strchr ("cSEM", argv[i][1]) != NULL)
|| strcmp (argv[i], "-MM") == 0))
{
/* Don't specify libraries if we won't link, since that would
cause a warning. */
added--;
library = NULL;
}
else
/* Pass other options through. */
continue;
}
else
{
int len;
if (saw_speclang)
continue;
/* If the filename ends in .c or .i, put options around it.
But not if a specified -x option is currently active. */
len = strlen (argv[i]);
if (len > 2
&& (argv[i][len - 1] == 'c' || argv[i][len - 1] == 'i')
&& argv[i][len - 2] == '.')
{
args[i] |= LANGSPEC;
added += 2;
}
}
}
if (quote)
fatal ("argument to `%s' missing\n", quote);
if (added)
{
arglist = (char **) malloc ((argc + added + 1) * sizeof (char *));
for (i = 1, j = 1; i < argc; i++, j++)
{
arglist[j] = argv[i];
/* Make sure -lg++ is before the math library, since libg++
itself uses those math routines. */
if (!saw_math && (args[i] & MATHLIB) && library)
{
saw_math = 1;
arglist[j] = library;
arglist[++j] = argv[i];
}
/* Wrap foo.c and foo.i files in a language specification to
force the gcc compiler driver to run cc1plus on them. */
if (args[i] & LANGSPEC)
{
int len = strlen (argv[i]);
if (argv[i][len - 1] == 'i')
arglist[j++] = "-xc++-cpp-output";
else
arglist[j++] = "-xc++";
arglist[j++] = argv[i];
arglist[j] = "-xnone";
}
}
/* Add `-lg++' if we haven't already done so. */
if (library && !saw_math)
arglist[j++] = library;
arglist[j] = NULL;
}
else
/* No need to copy 'em all. */
arglist = argv;
arglist[0] = gcc;
if (verbose)
{
if (j == 0)
j = argc;
for (i = 0; i < j; i++)
fprintf (stderr, " %s", arglist[i]);
fprintf (stderr, "\n");
}
#ifndef OS2
#ifdef __MSDOS__
run_dos (gcc, arglist);
#else /* !__MSDOS__ */
if (execvp (gcc, arglist) < 0)
pfatal_with_name (gcc);
#endif /* __MSDOS__ */
#else /* OS2 */
if (spawnvp (gcc, arglist) < 0)
pfatal_with_name (gcc);
#endif
return 0;
}
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