gcc/config/nextstep.c

   1 /* Functions for generic NeXT as target machine for GNU C compiler.
   2    Copyright (C) 1989, 90-93, 1996 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 /* Make everything that used to go in the text section really go there.  */
  22
  23 int flag_no_mach_text_sections = 0;
  24
  25 #define OPT_STRCMP(opt) (!strncmp (opt, p, sizeof (opt)-1))
  26
  27 /* 1 if handle_pragma has been called yet.  */
  28
  29 static int pragma_initialized;
  30
  31 /* Initial setting of `optimize'.  */
  32
  33 static int initial_optimize_flag;
  34
  35 extern char *get_directive_line ();
  36
  37 /* Called from check_newline via the macro HANDLE_PRAGMA.
  38    FINPUT is the source file input stream.
  39    CH is the first character after `#pragma'.
  40    The result is the terminating character ('\n' or EOF).  */
  41
  42 int
  43 handle_pragma (finput, ch, get_line_function)
  44      FILE *finput;
  45      int ch;
  46      char *(*get_line_function) ();
  47 {
  48   register char *p;
  49
  50   /* Record initial setting of optimize flag, so we can restore it.  */
  51   if (!pragma_initialized)
  52     {
  53       pragma_initialized = 1;
  54       initial_optimize_flag = optimize;
  55     }
  56
  57   /* Nothing to do if #pragma is by itself.  */
  58   if (ch == '\n' || ch == EOF)
  59     return ch;
  60
  61   p = (*get_line_function) (finput);
  62   if (OPT_STRCMP ("CC_OPT_ON"))
  63     {
  64       optimize = 1, obey_regdecls = 0;
  65       warning ("optimization turned on");
  66     }
  67   else if (OPT_STRCMP ("CC_OPT_OFF"))
  68     {
  69       optimize = 0, obey_regdecls = 1;
  70       warning ("optimization turned off");
  71     }
  72   else if (OPT_STRCMP ("CC_OPT_RESTORE"))
  73     {
  74       extern int initial_optimize_flag;
  75
  76       if (optimize != initial_optimize_flag)
  77         {
  78           if (initial_optimize_flag)
  79             obey_regdecls = 0;
  80           else
  81             obey_regdecls = 1;
  82           optimize = initial_optimize_flag;
  83         }
  84       warning ("optimization level restored");
  85     }
  86   else if (OPT_STRCMP ("CC_WRITABLE_STRINGS"))
  87     flag_writable_strings = 1;
  88   else if (OPT_STRCMP ("CC_NON_WRITABLE_STRINGS"))
  89     flag_writable_strings = 0;
  90   else if (OPT_STRCMP ("CC_NO_MACH_TEXT_SECTIONS"))
  91     flag_no_mach_text_sections = 1;
  92
  93   /* get_line_function must leave the last character read in FINPUT.  */
  94   return getc (finput);
  95 }