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- /* G++ preliminary semantic processing for the compiler driver.
- Copyright (C) 1993 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"
- #include "gvarargs.h"
- #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. */
- #if __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
-
- extern int errno, sys_nerr;
- #if defined(bsd4_4)
- 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 (va_alist)
- va_dcl
- {
- va_list ap;
- char *format;
-
- va_start (ap);
- format = va_arg (ap, char *);
- 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 (va_alist)
- va_dcl
- {
- va_list ap;
- char *format;
-
- va_start (ap);
- format = va_arg (ap, char *);
- 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 (*fn)();
- 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)
- {
- 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;
- }
-