1 /* Definitions of target machine for GNU compiler, 2 for PowerPC machines running Linux. 3 Copyright (C) 1996-2013 Free Software Foundation, Inc. 4 Contributed by Michael Meissner (meissner@cygnus.com). 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published 10 by the Free Software Foundation; either version 3, or (at your 11 option) any later version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 16 License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 /* Linux doesn't support saving and restoring 64-bit regs in a 32-bit 23 process. */ 24 #define OS_MISSING_POWERPC64 1 25 26 /* We use glibc _mcount for profiling. */ 27 #define NO_PROFILE_COUNTERS 1 28 29 #ifdef SINGLE_LIBC 30 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) 31 #else 32 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) 33 #endif 34 35 /* glibc has float and long double forms of math functions. */ 36 #undef TARGET_C99_FUNCTIONS 37 #define TARGET_C99_FUNCTIONS (OPTION_GLIBC) 38 39 /* Whether we have sincos that follows the GNU extension. */ 40 #undef TARGET_HAS_SINCOS 41 #define TARGET_HAS_SINCOS (OPTION_GLIBC) 42 43 #undef TARGET_OS_CPP_BUILTINS 44 #define TARGET_OS_CPP_BUILTINS() \ 45 do \ 46 { \ 47 builtin_define_std ("PPC"); \ 48 builtin_define_std ("powerpc"); \ 49 builtin_assert ("cpu=powerpc"); \ 50 builtin_assert ("machine=powerpc"); \ 51 TARGET_OS_SYSV_CPP_BUILTINS (); \ 52 } \ 53 while (0) 54 55 #undef CPP_OS_DEFAULT_SPEC 56 #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)" 57 58 /* The GNU C++ standard library currently requires _GNU_SOURCE being 59 defined on glibc-based systems. This temporary hack accomplishes this, 60 it should go away as soon as libstdc++-v3 has a real fix. */ 61 #undef CPLUSPLUS_CPP_SPEC 62 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)" 63 64 #undef LINK_SHLIB_SPEC 65 #define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}" 66 67 #undef LIB_DEFAULT_SPEC 68 #define LIB_DEFAULT_SPEC "%(lib_linux)" 69 70 #undef STARTFILE_DEFAULT_SPEC 71 #define STARTFILE_DEFAULT_SPEC "%(startfile_linux)" 72 73 #undef ENDFILE_DEFAULT_SPEC 74 #define ENDFILE_DEFAULT_SPEC "%(endfile_linux)" 75 76 #undef LINK_START_DEFAULT_SPEC 77 #define LINK_START_DEFAULT_SPEC "%(link_start_linux)" 78 79 #undef LINK_OS_DEFAULT_SPEC 80 #define LINK_OS_DEFAULT_SPEC "%(link_os_linux)" 81 82 #undef DEFAULT_ASM_ENDIAN 83 #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN) 84 #define DEFAULT_ASM_ENDIAN " -mlittle" 85 #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ 86 " -m elf32lppclinux", \ 87 " -m elf32lppclinux") 88 #else 89 #define DEFAULT_ASM_ENDIAN " -mbig" 90 #define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \ 91 " -m elf32lppclinux", \ 92 " -m elf32ppclinux") 93 #endif 94 95 #undef LINK_OS_LINUX_SPEC 96 #define LINK_OS_LINUX_SPEC LINK_OS_LINUX_EMUL " %{!shared: %{!static: \ 97 %{rdynamic:-export-dynamic} \ 98 -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}" 99 100 #define LINK_GCC_C_SEQUENCE_SPEC \ 101 "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}" 102 103 /* Use --as-needed -lgcc_s for eh support. */ 104 #ifdef HAVE_LD_AS_NEEDED 105 #define USE_LD_AS_NEEDED 1 106 #endif 107 108 /* Override rs6000.h definition. */ 109 #undef ASM_APP_ON 110 #define ASM_APP_ON "#APP\n" 111 112 /* Override rs6000.h definition. */ 113 #undef ASM_APP_OFF 114 #define ASM_APP_OFF "#NO_APP\n" 115 116 /* For backward compatibility, we must continue to use the AIX 117 structure return convention. */ 118 #undef DRAFT_V4_STRUCT_RET 119 #define DRAFT_V4_STRUCT_RET 1 120 121 /* We are 32-bit all the time, so optimize a little. */ 122 #undef TARGET_64BIT 123 #define TARGET_64BIT 0 124 125 /* We don't need to generate entries in .fixup, except when 126 -mrelocatable or -mrelocatable-lib is given. */ 127 #undef RELOCATABLE_NEEDS_FIXUP 128 #define RELOCATABLE_NEEDS_FIXUP \ 129 (rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE) 130 131 #define TARGET_POSIX_IO 132 133 #ifdef TARGET_LIBC_PROVIDES_SSP 134 /* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */ 135 #define TARGET_THREAD_SSP_OFFSET -0x7008 136 #endif 137 138 #define POWERPC_LINUX 139 140 /* ppc linux has 128-bit long double support in glibc 2.4 and later. */ 141 #ifdef TARGET_DEFAULT_LONG_DOUBLE_128 142 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 143 #endif 144 145 /* Static stack checking is supported by means of probes. */ 146 #define STACK_CHECK_STATIC_BUILTIN 1 147