gcc/config/freebsd.h

   1 /* Base configuration file for all FreeBSD targets.
   2    Copyright (C) 1999, 2000, 2001 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    Further work by David O'Brien <obrien@FreeBSD.org> and
  27    Loren J. Rittle <ljrittle@acm.org>.  */
  28
  29
  30 /* This defines which switch letters take arguments.  On FreeBSD, most of
  31    the normal cases (defined in gcc.c) apply, and we also have -h* and
  32    -z* options (for the linker) (coming from SVR4).
  33    We also have -R (alias --rpath), no -z, --soname (-h), --assert etc.  */
  34
  35 #define FBSD_SWITCH_TAKES_ARG(CHAR)                                     \
  36   (DEFAULT_SWITCH_TAKES_ARG (CHAR)                                      \
  37     || (CHAR) == 'h'                                                    \
  38     || (CHAR) == 'z' /* ignored by ld */                                \
  39     || (CHAR) == 'R')
  40
  41 #undef SWITCH_TAKES_ARG
  42 #define SWITCH_TAKES_ARG(CHAR) (FBSD_SWITCH_TAKES_ARG(CHAR))
  43
  44 #define FBSD_WORD_SWITCH_TAKES_ARG(STR)                                 \
  45   (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)                                  \
  46    || !strcmp ((STR), "rpath") || !strcmp ((STR), "rpath-link")         \
  47    || !strcmp ((STR), "soname") || !strcmp ((STR), "defsym")            \
  48    || !strcmp ((STR), "assert") || !strcmp ((STR), "dynamic-linker"))
  49
  50 #undef WORD_SWITCH_TAKES_ARG
  51 #define WORD_SWITCH_TAKES_ARG(STR) (FBSD_WORD_SWITCH_TAKES_ARG(STR))
  52
  53 #if FBSD_MAJOR == 6
  54 #define FBSD_CPP_PREDEFINES \
  55   "-D__FreeBSD__=6 -Dunix -D__ELF__ -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  56 #endif
  57
  58 #if FBSD_MAJOR == 5
  59 #define FBSD_CPP_PREDEFINES \
  60   "-D__FreeBSD__=5 -Dunix -D__ELF__ -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  61 #endif
  62
  63 #if FBSD_MAJOR == 4
  64 #define FBSD_CPP_PREDEFINES \
  65   "-D__FreeBSD__=4 -Dunix -D__ELF__ -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  66 #endif
  67
  68 #if FBSD_MAJOR == 3
  69 #define FBSD_CPP_PREDEFINES \
  70   "-D__FreeBSD__=3 -Dunix -D__ELF__ -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  71 #endif
  72
  73 #ifndef FBSD_CPP_PREDEFINES
  74 #define FBSD_CPP_PREDEFINES \
  75   "-D__FreeBSD__   -Dunix -D__ELF__ -Asystem=unix -Asystem=bsd -Asystem=FreeBSD"
  76 #endif
  77
  78 #undef  CPP_PREDEFINES
  79 #define CPP_PREDEFINES FBSD_CPP_PREDEFINES
  80
  81 /* Provide a CPP_SPEC appropriate for FreeBSD.  We just deal with the GCC
  82    option `-posix', and PIC issues.  */
  83
  84 #undef CPP_SPEC
  85 #define CPP_SPEC "%(cpp_cpu)                                            \
  86   %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__}               \
  87   %{posix:-D_POSIX_SOURCE}"
  88
  89 /* Provide a LIB_SPEC appropriate for FreeBSD as configured and as
  90    required by the user-land thread model.  Before __FreeBSD_version
  91    500016, select the appropriate libc, depending on whether we're
  92    doing profiling or need threads support.  At __FreeBSD_version
  93    500016 and later, when threads support is requested include both
  94    -lc and -lc_r instead of only -lc_r.  To make matters interesting,
  95    we can't actually use __FreeBSD_version provided by <osreldate.h>
  96    directly since it breaks cross-compiling.  As a final twist, make
  97    it a hard error if -pthread is provided on the command line and gcc
  98    was configured with --disable-threads (this will help avoid bug
  99    reports from users complaining about threading when they
 100    misconfigured the gcc bootstrap but are later consulting FreeBSD
 101    manual pages that refer to the mythical -pthread option).  */
 102
 103 #undef  LIB_SPEC
 104 #ifdef FBSD_NO_THREADS
 105 #define LIB_SPEC "                                                      \
 106   %{pthread: %eThe -pthread option is only supported on FreeBSD when gcc \
 107 is built with the --enable-threads configure-time option.}              \
 108   %{!shared:                                                            \
 109     %{!pg: -lc}                                                         \
 110     %{pg:  -lc_p}                                                       \
 111   }"
 112 #else
 113 #if FBSD_MAJOR >= 5
 114 #define LIB_SPEC "                                                      \
 115   %{!shared:                                                            \
 116     %{!pg: %{pthread:-lc_r} -lc}                                        \
 117     %{pg:  %{pthread:-lc_r_p} -lc_p}                                    \
 118   }"
 119 #else
 120 #define LIB_SPEC "                                                      \
 121   %{!shared:                                                            \
 122     %{!pg:                                                              \
 123       %{!pthread:-lc}                                                   \
 124       %{pthread:-lc_r}}                                                 \
 125     %{pg:                                                               \
 126       %{!pthread:-lc_p}                                                 \
 127       %{pthread:-lc_r_p}}                                               \
 128   }"
 129 #endif
 130 #endif
 131
 132 /* Code generation parameters.  */
 133
 134 /* Make gcc agree with <machine/ansi.h>.  */
 135
 136 #undef WCHAR_TYPE
 137 #define WCHAR_TYPE "int"
 138
 139 #undef WCHAR_UNSIGNED
 140 #define WCHAR_UNSIGNED 0
 141
 142 /* Don't default to pcc-struct-return, because gcc is the only compiler, and
 143    we want to retain compatibility with older gcc versions
 144    (even though the SVR4 ABI for the i386 says that records and unions are
 145    returned in memory).  */
 146 #undef DEFAULT_PCC_STRUCT_RETURN
 147 #define DEFAULT_PCC_STRUCT_RETURN 0
 148
 149 /* Ensure we the configuration knows our system correctly so we can link with
 150    libraries compiled with the native cc.  */
 151 #undef NO_DOLLAR_IN_LABEL
 152
 153 /* The GNU tools operate better with dwarf2 than stabs.  Since we
 154    don't have any native tools to be compatible with, default to
 155    dwarf2.  */
 156 #undef PREFERRED_DEBUGGING_TYPE
 157 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 158
 159 #undef IDENT_ASM_OP
 160 #define IDENT_ASM_OP "\t.ident\t"
 161
 162 /* Output #ident as a .ident.  */
 163 #undef ASM_OUTPUT_IDENT
 164 #define ASM_OUTPUT_IDENT(FILE, NAME)                                    \
 165   fprintf ((FILE), "%s\"%s\"\n", IDENT_ASM_OP, (NAME));
 166
 167 /* Miscellaneous parameters.  */
 168
 169 /* Don't assume anything about the header files.  */
 170 #undef NO_IMPLICIT_EXTERN_C
 171 #define NO_IMPLICIT_EXTERN_C
 172
 173 /* Allow #sccs in preprocessor.  */
 174 #define SCCS_DIRECTIVE
 175
 176 /* Handle #pragma weak and #pragma pack.  */
 177 #define HANDLE_SYSV_PRAGMA