gcc/config/freebsd.h

   1 /* Base configuration file for all FreeBSD targets.
   2    Copyright (C) 1999 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 /* Common FreeBSD configuration.
  22    All FreeBSD architectures should include this file, which will specify
  23    their commonalities.
  24    Adapted from gcc/config/i386/freebsd-elf.h by
  25    David O'Brien <obrien@FreeBSD.org>.  */
  26
  27
  28 /* This defines which switch letters take arguments.  On FreeBSD, most of
  29    the normal cases (defined in gcc.c) apply, and we also have -h* and
  30    -z* options (for the linker) (coming from SVR4).
  31    We also have -R (alias --rpath), no -z, --soname (-h), --assert etc.  */
  32
  33 #define FBSD_SWITCH_TAKES_ARG(CHAR)                                     \
  34   (DEFAULT_SWITCH_TAKES_ARG (CHAR)                                      \
  35     || (CHAR) == 'h'                                                    \
  36     || (CHAR) == 'z' /* ignored by ld */                                \
  37     || (CHAR) == 'R')
  38
  39 #undef SWITCH_TAKES_ARG
  40 #define SWITCH_TAKES_ARG(CHAR) (FBSD_SWITCH_TAKES_ARG(CHAR))
  41
  42 #define FBSD_WORD_SWITCH_TAKES_ARG(STR)                                 \
  43   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                                  \
  44    || !strcmp ((STR), "rpath") || !strcmp ((STR), "rpath-link")         \
  45    || !strcmp ((STR), "soname") || !strcmp ((STR), "defsym")            \
  46    || !strcmp ((STR), "assert") || !strcmp ((STR), "dynamic-linker"))
  47
  48 #undef WORD_SWITCH_TAKES_ARG
  49 #define WORD_SWITCH_TAKES_ARG(STR) (FBSD_WORD_SWITCH_TAKES_ARG(STR))
  50
  51 /* Provide a CPP_SPEC appropriate for FreeBSD.  We just deal with the GCC
  52    option `-posix', and PIC issues.  */
  53
  54 #undef CPP_SPEC
  55 #define CPP_SPEC "%(cpp_cpu)                                            \
  56   %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__}               \
  57   %{posix:-D_POSIX_SOURCE}"
  58
  59 /* Provide a LIB_SPEC appropriate for FreeBSD.  Just select the appropriate
  60    libc, depending on whether we're doing profiling or need threads support.
  61    (simular to the default, except no -lg, and no -p).  */
  62
  63 #undef LIB_SPEC
  64 #define LIB_SPEC                                                        \
  65   "%{!shared:                                                           \
  66      %{!pg:%{!pthread:%{!kthread:-lc}                                   \
  67        %{kthread:-lpthread -lc}}                                        \
  68        %{pthread:-lc_r}}                                                \
  69      %{pg:%{!pthread:%{!kthread:-lc_p}                                  \
  70        %{kthread:-lpthread_p -lc_p}}                                    \
  71        %{pthread:-lc_r_p}}}"
  72
  73
  74 /* Code generation parameters.  */
  75
  76 /* Make gcc agree with <machine/ansi.h>.  */
  77
  78 #undef WCHAR_TYPE
  79 #define WCHAR_TYPE "int"
  80
  81 #undef WCHAR_UNSIGNED
  82 #define WCHAR_UNSIGNED 0
  83
  84 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
  85    we want to retain compatibility with older gcc versions
  86    (even though the SVR4 ABI for the i386 says that records and unions are
  87    returned in memory).  */
  88 #undef DEFAULT_PCC_STRUCT_RETURN
  89 #define DEFAULT_PCC_STRUCT_RETURN 0
  90
  91 /* Ensure we the configuration knows our system correctly so we can link with
  92    libraries compiled with the native cc.  */
  93 #undef NO_DOLLAR_IN_LABEL
  94
  95 /* Use more efficient ``thunks'' to implement C++ vtables.  */
  96 #undef DEFAULT_VTABLE_THUNKS
  97 #define DEFAULT_VTABLE_THUNKS 1
  98
  99 /* This is BSD, so use stabs instead of DWARF debug format.  */
 100 #undef PREFERRED_DEBUGGING_TYPE
 101 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 102
 103 /* Attach a special .ident directive to the end of the file to identify
 104    the version of GCC which compiled this code.  The format of the .ident
 105    string is patterned after the ones produced by native SVR4 C compilers.  */
 106 #undef IDENT_ASM_OP
 107 #define IDENT_ASM_OP ".ident"
 108
 109 /* Output #ident as a .ident.  */
 110 #undef ASM_OUTPUT_IDENT
 111 #define ASM_OUTPUT_IDENT(FILE, NAME)                                    \
 112   fprintf ((FILE), "\t%s\t\"%s\"\n", IDENT_ASM_OP, (NAME));
 113
 114 #undef ASM_IDENTIFY_LANGUAGE
 115 #define ASM_IDENTIFY_LANGUAGE(FILE)                                     \
 116   fprintf ((FILE), "\t%s \"GCC (%s) %s\"\n", IDENT_ASM_OP,              \
 117            lang_identify (), version_string)
 118
 119 #undef ASM_FILE_END
 120 #define ASM_FILE_END(FILE)                                              \
 121 do {                                                                    \
 122      if (!flag_no_ident)                                                \
 123         fprintf ((FILE), "\t%s\t\"GCC: (GNU) %s\"\n",                   \
 124                  IDENT_ASM_OP, version_string);                         \
 125    } while (0)
 126
 127
 128 /* Miscellaneous parameters.  */
 129
 130 /* Don't assume anything about the header files.  */
 131 #undef NO_IMPLICIT_EXTERN_C
 132 #define NO_IMPLICIT_EXTERN_C
 133
 134 /* Allow #sccs in preprocessor.  */
 135 #define SCCS_DIRECTIVE
 136
 137 /* Handle #pragma weak and #pragma pack.  */
 138 #define HANDLE_SYSV_PRAGMA
 139
 140 /* Tell libgcc2.c that FreeBSD targets support atexit(3).  */
 141 #define HAVE_ATEXIT