mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
209 lines
4.6 KiB
C
209 lines
4.6 KiB
C
|
/* depend.c - Handle dependency tracking.
|
|||
|
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
|
|||
|
|
|||
|
This file is part of GAS, the GNU Assembler.
|
|||
|
|
|||
|
GAS 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.
|
|||
|
|
|||
|
GAS 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 GAS; see the file COPYING. If not, write to the Free
|
|||
|
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
|
|||
|
02111-1307, USA. */
|
|||
|
|
|||
|
#include "as.h"
|
|||
|
|
|||
|
/* The file to write to, or NULL if no dependencies being kept. */
|
|||
|
static char *dep_file = NULL;
|
|||
|
|
|||
|
struct dependency
|
|||
|
{
|
|||
|
char *file;
|
|||
|
struct dependency *next;
|
|||
|
};
|
|||
|
|
|||
|
/* All the files we depend on. */
|
|||
|
static struct dependency *dep_chain = NULL;
|
|||
|
|
|||
|
/* Current column in output file. */
|
|||
|
static int column = 0;
|
|||
|
|
|||
|
static int quote_string_for_make PARAMS ((FILE *, char *));
|
|||
|
static void wrap_output PARAMS ((FILE *, char *, int));
|
|||
|
|
|||
|
/* Number of columns allowable. */
|
|||
|
#define MAX_COLUMNS 72
|
|||
|
|
|||
|
|
|||
|
|
|||
|
/* Start saving dependencies, to be written to FILENAME. If this is
|
|||
|
never called, then dependency tracking is simply skipped. */
|
|||
|
|
|||
|
void
|
|||
|
start_dependencies (filename)
|
|||
|
char *filename;
|
|||
|
{
|
|||
|
dep_file = filename;
|
|||
|
}
|
|||
|
|
|||
|
/* Noticed a new filename, so try to register it. */
|
|||
|
|
|||
|
void
|
|||
|
register_dependency (filename)
|
|||
|
char *filename;
|
|||
|
{
|
|||
|
struct dependency *dep;
|
|||
|
|
|||
|
if (dep_file == NULL)
|
|||
|
return;
|
|||
|
|
|||
|
for (dep = dep_chain; dep != NULL; dep = dep->next)
|
|||
|
{
|
|||
|
if (! strcmp (filename, dep->file))
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
dep = (struct dependency *) xmalloc (sizeof (struct dependency));
|
|||
|
dep->file = xstrdup (filename);
|
|||
|
dep->next = dep_chain;
|
|||
|
dep_chain = dep;
|
|||
|
}
|
|||
|
|
|||
|
/* Quote a file name the way `make' wants it, and print it to FILE.
|
|||
|
If FILE is NULL, do no printing, but return the length of the
|
|||
|
quoted string.
|
|||
|
|
|||
|
This code is taken from gcc with only minor changes. */
|
|||
|
|
|||
|
static int
|
|||
|
quote_string_for_make (file, src)
|
|||
|
FILE *file;
|
|||
|
char *src;
|
|||
|
{
|
|||
|
char *p = src;
|
|||
|
int i = 0;
|
|||
|
for (;;)
|
|||
|
{
|
|||
|
char c = *p++;
|
|||
|
switch (c)
|
|||
|
{
|
|||
|
case '\0':
|
|||
|
case ' ':
|
|||
|
case '\t':
|
|||
|
{
|
|||
|
/* GNU make uses a weird quoting scheme for white space.
|
|||
|
A space or tab preceded by 2N+1 backslashes represents
|
|||
|
N backslashes followed by space; a space or tab
|
|||
|
preceded by 2N backslashes represents N backslashes at
|
|||
|
the end of a file name; and backslashes in other
|
|||
|
contexts should not be doubled. */
|
|||
|
char *q;
|
|||
|
for (q = p - 1; src < q && q[-1] == '\\'; q--)
|
|||
|
{
|
|||
|
if (file)
|
|||
|
putc ('\\', file);
|
|||
|
i++;
|
|||
|
}
|
|||
|
}
|
|||
|
if (!c)
|
|||
|
return i;
|
|||
|
if (file)
|
|||
|
putc ('\\', file);
|
|||
|
i++;
|
|||
|
goto ordinary_char;
|
|||
|
|
|||
|
case '$':
|
|||
|
if (file)
|
|||
|
putc (c, file);
|
|||
|
i++;
|
|||
|
/* Fall through. This can mishandle things like "$(" but
|
|||
|
there's no easy fix. */
|
|||
|
default:
|
|||
|
ordinary_char:
|
|||
|
/* This can mishandle characters in the string "\0\n%*?[\\~";
|
|||
|
exactly which chars are mishandled depends on the `make' version.
|
|||
|
We know of no portable solution for this;
|
|||
|
even GNU make 3.76.1 doesn't solve the problem entirely.
|
|||
|
(Also, '\0' is mishandled due to our calling conventions.) */
|
|||
|
if (file)
|
|||
|
putc (c, file);
|
|||
|
i++;
|
|||
|
break;
|
|||
|
}
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* Append some output to the file, keeping track of columns and doing
|
|||
|
wrapping as necessary. */
|
|||
|
|
|||
|
static void
|
|||
|
wrap_output (f, string, spacer)
|
|||
|
FILE *f;
|
|||
|
char *string;
|
|||
|
int spacer;
|
|||
|
{
|
|||
|
int len = quote_string_for_make (NULL, string);
|
|||
|
|
|||
|
if (len == 0)
|
|||
|
return;
|
|||
|
|
|||
|
if (column && MAX_COLUMNS - 1 /*spacer*/ - 2 /*` \'*/ < column + len)
|
|||
|
{
|
|||
|
fprintf (f, " \\\n ");
|
|||
|
column = 0;
|
|||
|
if (spacer == ' ')
|
|||
|
spacer = '\0';
|
|||
|
}
|
|||
|
|
|||
|
if (spacer == ' ')
|
|||
|
{
|
|||
|
putc (spacer, f);
|
|||
|
++column;
|
|||
|
}
|
|||
|
|
|||
|
quote_string_for_make (f, string);
|
|||
|
column += len;
|
|||
|
|
|||
|
if (spacer == ':')
|
|||
|
{
|
|||
|
putc (spacer, f);
|
|||
|
++column;
|
|||
|
}
|
|||
|
}
|
|||
|
|
|||
|
/* Print dependency file. */
|
|||
|
|
|||
|
void
|
|||
|
print_dependencies ()
|
|||
|
{
|
|||
|
FILE *f;
|
|||
|
struct dependency *dep;
|
|||
|
|
|||
|
if (dep_file == NULL)
|
|||
|
return;
|
|||
|
|
|||
|
f = fopen (dep_file, "w");
|
|||
|
if (f == NULL)
|
|||
|
{
|
|||
|
as_warn (_("Can't open `%s' for writing"), dep_file);
|
|||
|
return;
|
|||
|
}
|
|||
|
|
|||
|
column = 0;
|
|||
|
wrap_output (f, out_file_name, ':');
|
|||
|
for (dep = dep_chain; dep != NULL; dep = dep->next)
|
|||
|
wrap_output (f, dep->file, ' ');
|
|||
|
|
|||
|
putc ('\n', f);
|
|||
|
|
|||
|
if (fclose (f))
|
|||
|
as_warn (_("Can't close `%s'"), dep_file);
|
|||
|
}
|