gcc/config/nextstep.c

   1 /* Functions for generic NeXT as target machine for GNU C compiler.
   2    Copyright (C) 1989, 90-93, 96, 1997 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "config.h"
  22 #include <stdio.h>
  23 #include "flags.h"
  24 #include "tree.h"
  25
  26 /* Make everything that used to go in the text section really go there.  */
  27
  28 int flag_no_mach_text_sections = 0;
  29
  30 #define OPT_STRCMP(opt) (!strncmp (opt, p, sizeof (opt)-1))
  31
  32 /* 1 if handle_pragma has been called yet.  */
  33
  34 static int pragma_initialized;
  35
  36 /* Initial setting of `optimize'.  */
  37
  38 static int initial_optimize_flag;
  39
  40 extern char *get_directive_line ();
  41
  42 /* Called from check_newline via the macro HANDLE_PRAGMA.
  43    FINPUT is the source file input stream.
  44    CH is the first character after `#pragma'.
  45    The result is 1 if the pragma was handled.  */
  46
  47 int
  48 handle_pragma (finput, node)
  49      FILE *finput;
  50      tree node;
  51 {
  52   int retval = 0;
  53   register char *pname;
  54
  55   /* Record initial setting of optimize flag, so we can restore it.  */
  56   if (!pragma_initialized)
  57     {
  58       pragma_initialized = 1;
  59       initial_optimize_flag = optimize;
  60     }
  61
  62   if (TREE_CODE (node) != IDENTIFIER_NODE)
  63     return 0;
  64
  65   pname = IDENTIFIER_POINTER (node);
  66
  67   if (strcmp (pname, "CC_OPT_ON") == 0)
  68     {
  69       optimize = 1, obey_regdecls = 0;
  70       warning ("optimization turned on");
  71       retval = 1;
  72     }
  73   else if (strcmp (pname, "CC_OPT_OFF") == 0)
  74     {
  75       optimize = 0, obey_regdecls = 1;
  76       warning ("optimization turned off");
  77       retval = 1;
  78     }
  79   else if (strcmp (pname, "CC_OPT_RESTORE") == 0)
  80     {
  81       extern int initial_optimize_flag;
  82
  83       if (optimize != initial_optimize_flag)
  84         {
  85           if (initial_optimize_flag)
  86             obey_regdecls = 0;
  87           else
  88             obey_regdecls = 1;
  89           optimize = initial_optimize_flag;
  90         }
  91       warning ("optimization level restored");
  92       retval = 1;
  93     }
  94   else if (strcmp (pname, "CC_WRITABLE_STRINGS") == 0)
  95     flag_writable_strings = retval = 1;
  96   else if (strcmp (pname, "CC_NON_WRITABLE_STRINGS") == 0)
  97     flag_writable_strings = 0, retval = 1;
  98   else if (strcmp (pname, "CC_NO_MACH_TEXT_SECTIONS") == 0)
  99     flag_no_mach_text_sections = retval = 1;
 100
 101   return retval;
 102 }