annotate gcc/config/freebsd-spec.h @ 145:1830386684a0

gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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1 /* Base configuration file for all FreeBSD targets.
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2 Copyright (C) 1999-2020 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 /* Common FreeBSD configuration.
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26 All FreeBSD architectures should include this file, which will specify
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27 their commonalities.
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28 Adapted from gcc/config/freebsd.h by
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29 David O'Brien <obrien@FreeBSD.org>
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30 Loren J. Rittle <ljrittle@acm.org>. */
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33 /* In case we need to know. */
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34 #define USING_CONFIG_FREEBSD_SPEC 1
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35
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36 #define FBSD_TARGET_OS_CPP_BUILTINS() \
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37 do \
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38 { \
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39 builtin_define_with_int_value ("__FreeBSD__", FBSD_MAJOR); \
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40 builtin_define_std ("unix"); \
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41 builtin_define ("__KPRINTF_ATTRIBUTE__"); \
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42 builtin_assert ("system=unix"); \
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43 builtin_assert ("system=bsd"); \
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44 builtin_assert ("system=FreeBSD"); \
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45 FBSD_TARGET_CPU_CPP_BUILTINS(); \
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46 } \
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47 while (0)
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48
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49 /* Define the default FreeBSD-specific per-CPU hook code. */
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50 #define FBSD_TARGET_CPU_CPP_BUILTINS() do {} while (0)
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51
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52 /* Provide a CPP_SPEC appropriate for FreeBSD. We just deal with the GCC
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53 option `-posix', and PIC issues. */
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54
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55 #define FBSD_CPP_SPEC " \
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56 %(cpp_cpu) \
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57 %(cpp_arch) \
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58 %{posix:-D_POSIX_SOURCE}"
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59
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60 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add
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61 the magical crtbegin.o file (see crtstuff.c) which provides part
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62 of the support for getting C++ file-scope static object constructed
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63 before entering `main'. */
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64
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65 #define FBSD_STARTFILE_SPEC \
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66 "%{!shared: \
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67 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
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68 %{!p:%{profile:gcrt1.o%s} \
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69 %{!profile: \
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70 %{pie: Scrt1.o%s;:crt1.o%s}}}}} \
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71 crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
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73 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on
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74 the magical crtend.o file (see crtstuff.c) which provides part of
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75 the support for getting C++ file-scope static object constructed
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76 before entering `main', followed by a normal "finalizer" file,
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77 `crtn.o'. */
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79 #define FBSD_ENDFILE_SPEC \
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80 "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
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81
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82 /* When threads support is requested include both -lc and the threading
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83 library (which assumes FreeBSD 5.x or later, __FreeBSD_version 500016
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84 to be precise).
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85 And make it a hard error if -pthread is provided on the command
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86 line and gcc was configured with --disable-threads (this will help
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87 avoid bug reports from users complaining about threading when they
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88 misconfigured the gcc bootstrap but are later consulting FreeBSD
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89 manual pages that refer to the mythical -pthread option). */
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90
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91 /* Provide a LIB_SPEC appropriate for FreeBSD. Just select the appropriate
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92 libc, depending on whether we're doing profiling or need threads support.
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93 (similar to the default, except no -lg, and no -p). */
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94
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95 #ifdef FBSD_NO_THREADS
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96 #define FBSD_LIB_SPEC " \
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97 %{pthread: %eThe -pthread option is only supported on FreeBSD when gcc \
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98 is built with the --enable-threads configure-time option.} \
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99 %{!shared: \
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100 %{!pg: -lc} \
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101 %{pg: -lc_p} \
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102 }"
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103 #else
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104 #define FBSD_LIB_SPEC " \
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105 %{!shared: \
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106 %{!pg: %{pthread:-lpthread} -lc} \
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107 %{pg: %{pthread:-lpthread_p} -lc_p} \
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108 } \
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109 %{shared: \
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110 %{pthread:-lpthread} -lc \
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111 }"
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112 #endif
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114 /* To make matters interesting, we can't actually use __FreeBSD_version
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115 provided by <osreldate.h> directly since it breaks cross-compiling. */
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116
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117 #if FBSD_MAJOR < 6
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118 #define FBSD_DYNAMIC_LINKER "/usr/libexec/ld-elf.so.1"
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119 #else
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120 #define FBSD_DYNAMIC_LINKER "/libexec/ld-elf.so.1"
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121 #endif
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122
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123 /* NOTE: The freebsd-spec.h header is included also for various
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124 non-FreeBSD powerpc targets, thus it should never define macros
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125 other than FBSD_* prefixed ones, or USING_CONFIG_FREEBSD_SPEC. */