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1 /* Definitions of target machine for GNU compiler,
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2 for PowerPC machines running Linux.
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3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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4 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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5 Contributed by Michael Meissner (meissner@cygnus.com).
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6
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7 This file is part of GCC.
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8
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9 GCC is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published
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11 by the Free Software Foundation; either version 3, or (at your
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12 option) any later version.
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13
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14 GCC is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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17 License for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with GCC; see the file COPYING3. If not see
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21 <http://www.gnu.org/licenses/>. */
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22
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23 #undef MD_EXEC_PREFIX
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24 #undef MD_STARTFILE_PREFIX
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25
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26 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
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27 process. */
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28 #define OS_MISSING_POWERPC64 1
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29
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30 /* We use glibc _mcount for profiling. */
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31 #define NO_PROFILE_COUNTERS 1
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32
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33 /* glibc has float and long double forms of math functions. */
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34 #undef TARGET_C99_FUNCTIONS
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35 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
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36
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37 /* Whether we have sincos that follows the GNU extension. */
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38 #undef TARGET_HAS_SINCOS
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39 #define TARGET_HAS_SINCOS (OPTION_GLIBC)
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40
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41 #undef TARGET_OS_CPP_BUILTINS
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42 #define TARGET_OS_CPP_BUILTINS() \
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43 do \
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44 { \
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45 builtin_define_std ("PPC"); \
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46 builtin_define_std ("powerpc"); \
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47 builtin_assert ("cpu=powerpc"); \
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48 builtin_assert ("machine=powerpc"); \
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49 TARGET_OS_SYSV_CPP_BUILTINS (); \
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50 } \
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51 while (0)
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52
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53 #undef CPP_OS_DEFAULT_SPEC
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54 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
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55
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56 /* The GNU C++ standard library currently requires _GNU_SOURCE being
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57 defined on glibc-based systems. This temporary hack accomplishes this,
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58 it should go away as soon as libstdc++-v3 has a real fix. */
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59 #undef CPLUSPLUS_CPP_SPEC
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60 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
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61
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62 #undef LINK_SHLIB_SPEC
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63 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
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64
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65 #undef LIB_DEFAULT_SPEC
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66 #define LIB_DEFAULT_SPEC "%(lib_linux)"
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67
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68 #undef STARTFILE_DEFAULT_SPEC
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69 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
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70
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71 #undef ENDFILE_DEFAULT_SPEC
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72 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
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73
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74 #undef LINK_START_DEFAULT_SPEC
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75 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
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76
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77 #undef LINK_OS_DEFAULT_SPEC
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78 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
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79
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80 #define LINK_GCC_C_SEQUENCE_SPEC \
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81 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
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82
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83 /* Use --as-needed -lgcc_s for eh support. */
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84 #ifdef HAVE_LD_AS_NEEDED
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85 #define USE_LD_AS_NEEDED 1
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86 #endif
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87
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88 #undef TARGET_VERSION
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89 #define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
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90
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91 /* Override rs6000.h definition. */
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92 #undef ASM_APP_ON
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93 #define ASM_APP_ON "#APP\n"
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94
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95 /* Override rs6000.h definition. */
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96 #undef ASM_APP_OFF
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97 #define ASM_APP_OFF "#NO_APP\n"
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98
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99 /* For backward compatibility, we must continue to use the AIX
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100 structure return convention. */
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101 #undef DRAFT_V4_STRUCT_RET
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102 #define DRAFT_V4_STRUCT_RET 1
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103
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104 /* We are 32-bit all the time, so optimize a little. */
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105 #undef TARGET_64BIT
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106 #define TARGET_64BIT 0
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107
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108 /* We don't need to generate entries in .fixup, except when
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109 -mrelocatable or -mrelocatable-lib is given. */
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110 #undef RELOCATABLE_NEEDS_FIXUP
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111 #define RELOCATABLE_NEEDS_FIXUP \
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112 (target_flags & target_flags_explicit & MASK_RELOCATABLE)
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113
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114 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
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115
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116 #define TARGET_POSIX_IO
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117
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118 #define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
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119
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120 #ifdef TARGET_LIBC_PROVIDES_SSP
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121 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */
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122 #define TARGET_THREAD_SSP_OFFSET -0x7008
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123 #endif
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124
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125 #define POWERPC_LINUX
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126
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127 /* ppc linux has 128-bit long double support in glibc 2.4 and later. */
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128 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128
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129 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
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130 #endif
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