583 lines
13 KiB
C
583 lines
13 KiB
C
/* G++ preliminary semantic processing for the compiler driver.
|
||
Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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||
Contributed by Brendan Kehoe (brendan@cygnus.com).
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||
This file is part of GNU CC.
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||
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)
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||
any later version.
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||
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||
GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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||
GNU General Public License for more details.
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||
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||
You should have received a copy of the GNU General Public License
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||
along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This program is a wrapper to the main `gcc' driver. For GNU C++,
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we need to do two special things: a) append `-lg++' in situations
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where it's appropriate, to link in libg++, and b) add `-xc++'..`-xnone'
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around file arguments named `foo.c' or `foo.i'. So, we do all of
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this semantic processing then just exec gcc with the new argument
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||
list.
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We used to do all of this in a small shell script, but many users
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found the performance of this as a shell script to be unacceptable.
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In situations where your PATH has a lot of NFS-mounted directories,
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using a script that runs sed and other things would be a nasty
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performance hit. With this program, we never search the PATH at all. */
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#include "config.h"
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#ifdef __STDC__
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include <stdio.h>
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#include <sys/types.h>
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#if !defined(_WIN32)
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#include <sys/file.h> /* May get R_OK, etc. on some systems. */
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#else
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#include <process.h>
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#endif
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#include <errno.h>
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/* Defined to the name of the compiler; if using a cross compiler, the
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Makefile should compile this file with the proper name
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(e.g., "i386-aout-gcc"). */
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#ifndef GCC_NAME
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#define GCC_NAME "gcc"
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#endif
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/* This bit is set if we saw a `-xfoo' language specification. */
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#define LANGSPEC (1<<1)
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/* This bit is set if they did `-lm' or `-lmath'. */
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#define MATHLIB (1<<2)
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#ifndef MATH_LIBRARY
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#define MATH_LIBRARY "-lm"
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#endif
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/* On MSDOS, write temp files in current dir
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because there's no place else we can expect to use. */
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#ifdef __MSDOS__
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#ifndef P_tmpdir
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#define P_tmpdir "."
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#endif
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#ifndef R_OK
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#define R_OK 4
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#define W_OK 2
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#define X_OK 1
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#endif
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#endif
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#ifndef VPROTO
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#ifdef __STDC__
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#define PVPROTO(ARGS) ARGS
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#define VPROTO(ARGS) ARGS
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#define VA_START(va_list,var) va_start(va_list,var)
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#else
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#define PVPROTO(ARGS) ()
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#define VPROTO(ARGS) (va_alist) va_dcl
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#define VA_START(va_list,var) va_start(va_list)
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#endif
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#endif
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#ifndef errno
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extern int errno;
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#endif
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extern int sys_nerr;
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#ifndef HAVE_STRERROR
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#if defined(bsd4_4)
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extern const char *const sys_errlist[];
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#else
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extern char *sys_errlist[];
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#endif
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#else
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extern char *strerror();
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#endif
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/* Name with which this program was invoked. */
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static char *programname;
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char *
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my_strerror(e)
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int e;
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{
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||
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#ifdef HAVE_STRERROR
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return strerror(e);
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#else
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static char buffer[30];
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if (!e)
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return "";
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if (e > 0 && e < sys_nerr)
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return sys_errlist[e];
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sprintf (buffer, "Unknown error %d", e);
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return buffer;
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#endif
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}
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#ifdef HAVE_VPRINTF
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/* Output an error message and exit */
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static void
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fatal VPROTO((char *format, ...))
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{
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#ifndef __STDC__
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char *format;
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#endif
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va_list ap;
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VA_START (ap, format);
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#ifndef __STDC__
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format = va_arg (ap, char*);
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#endif
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fprintf (stderr, "%s: ", programname);
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vfprintf (stderr, format, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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#if 0
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/* XXX Not needed for g++ driver. */
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delete_temp_files ();
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#endif
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exit (1);
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}
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static void
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error VPROTO((char *format, ...))
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{
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#ifndef __STDC__
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char *format;
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#endif
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va_list ap;
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||
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VA_START (ap, format);
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#ifndef __STDC__
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format = va_arg (ap, char*);
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#endif
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fprintf (stderr, "%s: ", programname);
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vfprintf (stderr, format, ap);
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va_end (ap);
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fprintf (stderr, "\n");
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}
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#else /* not HAVE_VPRINTF */
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static void
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error (msg, arg1, arg2)
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char *msg, *arg1, *arg2;
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{
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fprintf (stderr, "%s: ", programname);
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fprintf (stderr, msg, arg1, arg2);
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fprintf (stderr, "\n");
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}
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static void
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fatal (msg, arg1, arg2)
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char *msg, *arg1, *arg2;
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{
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error (msg, arg1, arg2);
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#if 0
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/* XXX Not needed for g++ driver. */
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delete_temp_files ();
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#endif
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exit (1);
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}
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#endif /* not HAVE_VPRINTF */
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/* More 'friendly' abort that prints the line and file.
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config.h can #define abort fancy_abort if you like that sort of thing. */
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void
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fancy_abort ()
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{
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fatal ("Internal g++ abort.");
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}
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char *
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xmalloc (size)
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unsigned size;
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{
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register char *value = (char *) malloc (size);
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if (value == 0)
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fatal ("virtual memory exhausted");
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return value;
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}
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/* Return a newly-allocated string whose contents concatenate those
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of s1, s2, s3. */
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static char *
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concat (s1, s2, s3)
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char *s1, *s2, *s3;
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{
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int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
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char *result = xmalloc (len1 + len2 + len3 + 1);
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||
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strcpy (result, s1);
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strcpy (result + len1, s2);
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strcpy (result + len1 + len2, s3);
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*(result + len1 + len2 + len3) = 0;
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||
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return result;
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||
}
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||
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static void
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pfatal_with_name (name)
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char *name;
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{
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fatal (concat ("%s: ", my_strerror (errno), ""), name);
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}
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#ifdef __MSDOS__
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/* This is the common prefix we use to make temp file names. */
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char *temp_filename;
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/* Length of the prefix. */
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int temp_filename_length;
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/* Compute a string to use as the base of all temporary file names. */
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static char *
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choose_temp_base_try (try, base)
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char *try;
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char *base;
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{
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char *rv;
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if (base)
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rv = base;
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else if (try == (char *)0)
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rv = 0;
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else if (access (try, R_OK | W_OK) != 0)
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rv = 0;
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else
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rv = try;
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return rv;
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}
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static void
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choose_temp_base ()
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{
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char *base = 0;
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int len;
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base = choose_temp_base_try (getenv ("TMPDIR"), base);
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base = choose_temp_base_try (getenv ("TMP"), base);
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base = choose_temp_base_try (getenv ("TEMP"), base);
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#ifdef P_tmpdir
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base = choose_temp_base_try (P_tmpdir, base);
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#endif
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base = choose_temp_base_try ("/usr/tmp", base);
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base = choose_temp_base_try ("/tmp", base);
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/* If all else fails, use the current directory! */
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if (base == (char *)0)
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base = "./";
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len = strlen (base);
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temp_filename = xmalloc (len + sizeof("/ccXXXXXX"));
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strcpy (temp_filename, base);
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if (len > 0 && temp_filename[len-1] != '/')
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temp_filename[len++] = '/';
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strcpy (temp_filename + len, "ccXXXXXX");
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mktemp (temp_filename);
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temp_filename_length = strlen (temp_filename);
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if (temp_filename_length == 0)
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abort ();
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}
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static void
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||
perror_exec (name)
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||
char *name;
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||
{
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||
char *s;
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||
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||
if (errno < sys_nerr)
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||
s = concat ("installation problem, cannot exec %s: ",
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my_strerror( errno ), "");
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else
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s = "installation problem, cannot exec %s";
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error (s, name);
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}
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||
/* This is almost exactly what's in gcc.c:pexecute for MSDOS. */
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void
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run_dos (program, argv)
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char *program;
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char *argv[];
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{
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char *scmd, *rf;
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FILE *argfile;
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int i;
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choose_temp_base (); /* not in gcc.c */
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scmd = (char *) malloc (strlen (program) + strlen (temp_filename) + 10);
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rf = scmd + strlen (program) + 6;
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sprintf (scmd, "%s.exe @%s.gp", program, temp_filename);
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argfile = fopen (rf, "w");
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if (argfile == 0)
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pfatal_with_name (rf);
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for (i=1; argv[i]; i++)
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{
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char *cp;
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for (cp = argv[i]; *cp; cp++)
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{
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||
if (*cp == '"' || *cp == '\'' || *cp == '\\' || isspace (*cp))
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fputc ('\\', argfile);
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fputc (*cp, argfile);
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}
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fputc ('\n', argfile);
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||
}
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fclose (argfile);
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i = system (scmd);
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remove (rf);
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||
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if (i == -1)
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perror_exec (program);
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||
}
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#endif /* __MSDOS__ */
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||
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||
int
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main (argc, argv)
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int argc;
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||
char **argv;
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||
{
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||
register int i, j = 0;
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||
register char *p;
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||
int verbose = 0;
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||
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||
/* This will be 0 if we encounter a situation where we should not
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link in libstdc++, or 2 if we should link in libg++ as well. */
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int library = 1;
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||
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||
/* Used to track options that take arguments, so we don't go wrapping
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those with -xc++/-xnone. */
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char *quote = NULL;
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||
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||
/* The new argument list will be contained in this. */
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char **arglist;
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||
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||
/* 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. */
|
||
char *saw_math = 0;
|
||
|
||
/* The number of arguments being added to what's in argv, other than
|
||
libraries. We use this to track the number of times we've inserted
|
||
-xc++/-xnone. */
|
||
int added = 0;
|
||
|
||
/* An array used to flag each argument that needs a bit set for
|
||
LANGSPEC or MATHLIB. */
|
||
int *args;
|
||
|
||
p = argv[0] + strlen (argv[0]);
|
||
|
||
/* If we're called as g++ (or i386-aout-g++), link in libg++ as well. */
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||
|
||
if (strcmp (p - 3, "g++") == 0)
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||
{
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||
library = 2;
|
||
}
|
||
|
||
while (p != argv[0] && p[-1] != '/')
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||
--p;
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||
programname = p;
|
||
|
||
if (argc == 1)
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||
fatal ("No input files specified");
|
||
|
||
#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 ((char *) 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 (library != 0 && strcmp (argv[i], "-nostdlib") == 0)
|
||
{
|
||
library = 0;
|
||
}
|
||
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++. */
|
||
library = 0;
|
||
}
|
||
}
|
||
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 (library != 0 && ((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. */
|
||
library = 0;
|
||
}
|
||
else
|
||
/* Pass other options through. */
|
||
continue;
|
||
}
|
||
else
|
||
{
|
||
int len;
|
||
|
||
if (saw_speclang)
|
||
{
|
||
saw_speclang = 0;
|
||
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 || library)
|
||
{
|
||
arglist = (char **) malloc ((argc + added + 4) * 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)
|
||
{
|
||
--j;
|
||
saw_math = 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 == 2)
|
||
arglist[j++] = "-lg++";
|
||
if (library)
|
||
arglist[j++] = "-lstdc++";
|
||
if (saw_math)
|
||
arglist[j++] = saw_math;
|
||
else if (library)
|
||
arglist[j++] = MATH_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");
|
||
}
|
||
#if !defined(OS2) && !defined (_WIN32)
|
||
#ifdef __MSDOS__
|
||
run_dos (gcc, arglist);
|
||
#else /* !__MSDOS__ */
|
||
if (execvp (gcc, arglist) < 0)
|
||
pfatal_with_name (gcc);
|
||
#endif /* __MSDOS__ */
|
||
#else /* OS2 or _WIN32 */
|
||
if (spawnvp (1, gcc, arglist) < 0)
|
||
pfatal_with_name (gcc);
|
||
#endif
|
||
|
||
return 0;
|
||
}
|