gcc/config/avr/driver-avr.c

   1 /* Subroutines for the gcc driver.
   2    Copyright (C) 2009-2016 Free Software Foundation, Inc.
   3    Contributed by Georg-Johann Lay <avr@gjlay.de>
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "diagnostic.h"
  25 #include "tm.h"
  26
  27 // Remove -nodevicelib from the command line if not needed
  28 #define X_NODEVLIB "%<nodevicelib"
  29
  30 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 };
  31
  32
  33 /* Implement spec function `device-specs-file´.
  34
  35    Validate mcu name given with -mmcu option. Compose
  36    -specs=<specs-file-name>%s. If everything went well then argv[0] is the
  37    inflated (absolute) first device-specs directory and argv[1] is a device
  38    or core name as supplied by -mmcu=*. When building GCC the path might be
  39    relative.  */
  40
  41 const char*
  42 avr_devicespecs_file (int argc, const char **argv)
  43 {
  44   const char *mmcu = NULL;
  45
  46 #ifdef DEBUG_SPECS
  47   if (verbose_flag)
  48     fnotice (stderr, "Running spec function '%s' with %d args\n\n",
  49              __FUNCTION__, argc);
  50 #endif
  51
  52   switch (argc)
  53     {
  54     case 0:
  55       fatal_error (input_location,
  56                    "bad usage of spec function %qs", "device-specs-file");
  57       return X_NODEVLIB;
  58
  59     case 1:
  60       if (0 == strcmp ("device-specs", argv[0]))
  61         {
  62           /* FIXME:  This means "device-specs%s" from avr.h:DRIVER_SELF_SPECS
  63              has not been resolved to a path.  That case can occur when the
  64              c++ testsuite is run from the build directory.  DejaGNU's
  65              libgloss.exp:get_multilibs runs $compiler without -B, i.e.runs
  66              xgcc without specifying a prefix.  Without any prefix, there is
  67              no means to find out where the specs files might be located.
  68              get_multilibs runs xgcc --print-multi-lib, hence we don't actually
  69              need information form a specs file and may skip it here.  */
  70           return X_NODEVLIB;
  71         }
  72
  73       mmcu = AVR_MMCU_DEFAULT;
  74       break;
  75
  76     default:
  77       mmcu = argv[1];
  78
  79       // Allow specifying the same MCU more than once.
  80
  81       for (int i = 2; i < argc; i++)
  82         if (0 != strcmp (mmcu, argv[i]))
  83           {
  84             error ("specified option %qs more than once", "-mmcu");
  85             return X_NODEVLIB;
  86           }
  87
  88       break;
  89     }
  90
  91   // Filter out silly -mmcu= arguments like "foo bar".
  92
  93   for (const char *s = mmcu; *s; s++)
  94     if (!ISALNUM (*s)
  95         && '-' != *s
  96         && '_' != *s)
  97       {
  98         error ("strange device name %qs after %qs: bad character %qc",
  99                mmcu, "-mmcu=", *s);
 100         return X_NODEVLIB;
 101       }
 102
 103   return concat ("-specs=device-specs", dir_separator_str, "specs-",
 104                  mmcu, "%s"
 105 #if defined (WITH_AVRLIBC)
 106                  " %{mmcu=avr*:" X_NODEVLIB "} %{!mmcu=*:" X_NODEVLIB "}",
 107 #else
 108                  " " X_NODEVLIB,
 109 #endif
 110                  NULL);
 111 }