libcc1/compiler.cc

   1 /* Compiler handling for plugin
   2    Copyright (C) 2014-2021 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include <cc1plugin-config.h>
  21 #include <string>
  22 #include <sstream>
  23 #include "libiberty.h"
  24 #include "compiler.hh"
  25 #include "xregex.h"
  26 #include "findcomp.hh"
  27 #include "intl.h"
  28
  29 // Construct an appropriate regexp to match the compiler name.
  30 static std::string
  31 make_regexp (const std::string &triplet_regexp, const char *compiler)
  32 {
  33   std::stringstream buf;
  34
  35   buf << "^" << triplet_regexp << "-";
  36
  37   // Quote the compiler name in case it has something funny in it.
  38   for (const char *p = compiler; *p; ++p)
  39     {
  40       switch (*p)
  41         {
  42         case '.':
  43         case '^':
  44         case '$':
  45         case '*':
  46         case '+':
  47         case '?':
  48         case '(':
  49         case ')':
  50         case '[':
  51         case '{':
  52         case '\\':
  53         case '|':
  54           buf << '\\';
  55           break;
  56         }
  57       buf << *p;
  58     }
  59   buf << "$";
  60
  61   return buf.str ();
  62 }
  63
  64 char *
  65 cc1_plugin::compiler::find (const char *, std::string &) const
  66 {
  67   return xstrdup (_("Compiler has not been specified"));
  68 }
  69
  70 char *
  71 cc1_plugin::compiler_triplet_regexp::find (const char *base,
  72                                            std::string &compiler) const
  73 {
  74   std::string rx = make_regexp (triplet_regexp_, base);
  75   if (verbose)
  76     fprintf (stderr, _("searching for compiler matching regex %s\n"),
  77              rx.c_str());
  78   regex_t triplet;
  79   int code = regcomp (&triplet, rx.c_str (), REG_EXTENDED | REG_NOSUB);
  80   if (code != 0)
  81     {
  82       size_t len = regerror (code, &triplet, NULL, 0);
  83       char err[len];
  84
  85       regerror (code, &triplet, err, len);
  86
  87       return concat ("Could not compile regexp \"",
  88                      rx.c_str (),
  89                      "\": ",
  90                      err,
  91                      (char *) NULL);
  92     }
  93
  94   if (!find_compiler (triplet, &compiler))
  95     {
  96       regfree (&triplet);
  97       return concat ("Could not find a compiler matching \"",
  98                      rx.c_str (),
  99                      "\"",
 100                      (char *) NULL);
 101     }
 102   regfree (&triplet);
 103   if (verbose)
 104     fprintf (stderr, _("found compiler %s\n"), compiler.c_str());
 105   return NULL;
 106 }
 107
 108 char *
 109 cc1_plugin::compiler_driver_filename::find (const char *,
 110                                             std::string &compiler) const
 111 {
 112   // Simulate fnotice by fprintf.
 113   if (verbose)
 114     fprintf (stderr, _("using explicit compiler filename %s\n"),
 115              driver_filename_.c_str());
 116   compiler = driver_filename_;
 117   return NULL;
 118 }