Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/linux.h @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
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1 /* Definitions for systems using the Linux kernel, with or without |
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2 MMU, using ELF at the compiler level but possibly FLT for final |
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3 linked executables and shared libraries in some no-MMU cases, and |
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4 possibly with a choice of libc implementations. |
| 131 | 5 Copyright (C) 1995-2018 Free Software Foundation, Inc. |
| 0 | 6 Contributed by Eric Youngdale. |
| 7 Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org). | |
| 8 | |
| 9 This file is part of GCC. | |
| 10 | |
| 11 GCC is free software; you can redistribute it and/or modify | |
| 12 it under the terms of the GNU General Public License as published by | |
| 13 the Free Software Foundation; either version 3, or (at your option) | |
| 14 any later version. | |
| 15 | |
| 16 GCC is distributed in the hope that it will be useful, | |
| 17 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 19 GNU General Public License for more details. | |
| 20 | |
| 21 Under Section 7 of GPL version 3, you are granted additional | |
| 22 permissions described in the GCC Runtime Library Exception, version | |
| 23 3.1, as published by the Free Software Foundation. | |
| 24 | |
| 25 You should have received a copy of the GNU General Public License and | |
| 26 a copy of the GCC Runtime Library Exception along with this program; | |
| 27 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 28 <http://www.gnu.org/licenses/>. */ | |
| 29 | |
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30 /* C libraries supported on Linux. */ |
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31 #ifdef SINGLE_LIBC |
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32 #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC) |
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33 #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC) |
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34 #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC) |
| 111 | 35 #undef OPTION_MUSL |
| 36 #define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL) | |
| 0 | 37 #else |
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38 #define OPTION_GLIBC (linux_libc == LIBC_GLIBC) |
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39 #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC) |
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40 #define OPTION_BIONIC (linux_libc == LIBC_BIONIC) |
| 111 | 41 #undef OPTION_MUSL |
| 42 #define OPTION_MUSL (linux_libc == LIBC_MUSL) | |
| 0 | 43 #endif |
| 44 | |
| 111 | 45 #define GNU_USER_TARGET_OS_CPP_BUILTINS() \ |
| 0 | 46 do { \ |
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47 if (OPTION_GLIBC) \ |
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48 builtin_define ("__gnu_linux__"); \ |
| 0 | 49 builtin_define_std ("linux"); \ |
| 50 builtin_define_std ("unix"); \ | |
| 51 builtin_assert ("system=linux"); \ | |
| 52 builtin_assert ("system=unix"); \ | |
| 53 builtin_assert ("system=posix"); \ | |
| 54 } while (0) | |
| 55 | |
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56 /* Determine which dynamic linker to use depending on whether GLIBC or |
| 111 | 57 uClibc or Bionic or musl is the default C library and whether |
| 58 -muclibc or -mglibc or -mbionic or -mmusl has been passed to change | |
| 59 the default. */ | |
| 0 | 60 |
| 111 | 61 #define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4) \ |
| 62 "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}" | |
| 0 | 63 |
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64 #if DEFAULT_LIBC == LIBC_GLIBC |
| 111 | 65 #define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ |
| 66 CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M) | |
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67 #elif DEFAULT_LIBC == LIBC_UCLIBC |
| 111 | 68 #define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ |
| 69 CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M) | |
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70 #elif DEFAULT_LIBC == LIBC_BIONIC |
| 111 | 71 #define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ |
| 72 CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M) | |
| 73 #elif DEFAULT_LIBC == LIBC_MUSL | |
| 74 #define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \ | |
| 75 CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B) | |
| 0 | 76 #else |
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77 #error "Unsupported DEFAULT_LIBC" |
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78 #endif /* DEFAULT_LIBC */ |
| 0 | 79 |
| 80 /* For most targets the following definitions suffice; | |
| 81 GLIBC_DYNAMIC_LINKER must be defined for each target using them, or | |
| 82 GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets | |
| 83 supporting both 32-bit and 64-bit compilation. */ | |
| 84 #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0" | |
| 85 #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0" | |
| 86 #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0" | |
| 111 | 87 #define UCLIBC_DYNAMIC_LINKERX32 "/lib/ldx32-uClibc.so.0" |
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88 #define BIONIC_DYNAMIC_LINKER "/system/bin/linker" |
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89 #define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker" |
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90 #define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64" |
| 111 | 91 #define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32" |
| 92 /* Should be redefined for each target that supports musl. */ | |
| 93 #define MUSL_DYNAMIC_LINKER "/dev/null" | |
| 94 #define MUSL_DYNAMIC_LINKER32 "/dev/null" | |
| 95 #define MUSL_DYNAMIC_LINKER64 "/dev/null" | |
| 96 #define MUSL_DYNAMIC_LINKERX32 "/dev/null" | |
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97 |
| 111 | 98 #define GNU_USER_DYNAMIC_LINKER \ |
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99 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \ |
| 111 | 100 BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER) |
| 101 #define GNU_USER_DYNAMIC_LINKER32 \ | |
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102 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \ |
| 111 | 103 BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32) |
| 104 #define GNU_USER_DYNAMIC_LINKER64 \ | |
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105 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \ |
| 111 | 106 BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64) |
| 107 #define GNU_USER_DYNAMIC_LINKERX32 \ | |
| 108 CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \ | |
| 109 BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32) | |
| 110 | |
| 111 /* Whether we have Bionic libc runtime */ | |
| 112 #undef TARGET_HAS_BIONIC | |
| 113 #define TARGET_HAS_BIONIC (OPTION_BIONIC) | |
| 114 | |
| 115 /* musl avoids problematic includes by rearranging the include directories. | |
| 116 * Unfortunately, this is mostly duplicated from cppdefault.c */ | |
| 117 #if DEFAULT_LIBC == LIBC_MUSL | |
| 118 #define INCLUDE_DEFAULTS_MUSL_GPP \ | |
| 119 { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, \ | |
| 120 GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, \ | |
| 121 { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, \ | |
| 122 GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 }, \ | |
| 123 { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, \ | |
| 124 GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, | |
| 125 | |
| 126 #ifdef LOCAL_INCLUDE_DIR | |
| 127 #define INCLUDE_DEFAULTS_MUSL_LOCAL \ | |
| 128 { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 }, \ | |
| 129 { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 }, | |
| 130 #else | |
| 131 #define INCLUDE_DEFAULTS_MUSL_LOCAL | |
| 132 #endif | |
| 133 | |
| 134 #ifdef PREFIX_INCLUDE_DIR | |
| 135 #define INCLUDE_DEFAULTS_MUSL_PREFIX \ | |
| 136 { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0}, | |
| 137 #else | |
| 138 #define INCLUDE_DEFAULTS_MUSL_PREFIX | |
| 139 #endif | |
| 140 | |
| 141 #ifdef CROSS_INCLUDE_DIR | |
| 142 #define INCLUDE_DEFAULTS_MUSL_CROSS \ | |
| 143 { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0}, | |
| 144 #else | |
| 145 #define INCLUDE_DEFAULTS_MUSL_CROSS | |
| 146 #endif | |
| 147 | |
| 148 #ifdef TOOL_INCLUDE_DIR | |
| 149 #define INCLUDE_DEFAULTS_MUSL_TOOL \ | |
| 150 { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0}, | |
| 151 #else | |
| 152 #define INCLUDE_DEFAULTS_MUSL_TOOL | |
| 153 #endif | |
| 0 | 154 |
| 111 | 155 #ifdef NATIVE_SYSTEM_HEADER_DIR |
| 156 #define INCLUDE_DEFAULTS_MUSL_NATIVE \ | |
| 157 { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 }, \ | |
| 158 { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 }, | |
| 159 #else | |
| 160 #define INCLUDE_DEFAULTS_MUSL_NATIVE | |
| 161 #endif | |
| 162 | |
| 163 #if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT) | |
| 164 # undef INCLUDE_DEFAULTS_MUSL_LOCAL | |
| 165 # define INCLUDE_DEFAULTS_MUSL_LOCAL | |
| 166 # undef INCLUDE_DEFAULTS_MUSL_NATIVE | |
| 167 # define INCLUDE_DEFAULTS_MUSL_NATIVE | |
| 168 #else | |
| 169 # undef INCLUDE_DEFAULTS_MUSL_CROSS | |
| 170 # define INCLUDE_DEFAULTS_MUSL_CROSS | |
| 171 #endif | |
| 0 | 172 |
| 111 | 173 #undef INCLUDE_DEFAULTS |
| 174 #define INCLUDE_DEFAULTS \ | |
| 175 { \ | |
| 176 INCLUDE_DEFAULTS_MUSL_GPP \ | |
| 177 INCLUDE_DEFAULTS_MUSL_LOCAL \ | |
| 178 INCLUDE_DEFAULTS_MUSL_PREFIX \ | |
| 179 INCLUDE_DEFAULTS_MUSL_CROSS \ | |
| 180 INCLUDE_DEFAULTS_MUSL_TOOL \ | |
| 181 INCLUDE_DEFAULTS_MUSL_NATIVE \ | |
| 182 { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 }, \ | |
| 183 { 0, 0, 0, 0, 0, 0 } \ | |
| 184 } | |
| 185 #endif | |
| 186 | |
| 187 #if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */ | |
| 188 /* This is a *uclinux* target. We don't define below macros to normal linux | |
| 189 versions, because doing so would require *uclinux* targets to include | |
| 190 linux.c, linux-protos.h, linux.opt, etc. We could, alternatively, add | |
| 191 these files to *uclinux* targets, but that would only pollute option list | |
| 192 (add -mglibc, etc.) without adding any useful support. */ | |
| 193 | |
| 194 /* Define TARGET_LIBC_HAS_FUNCTION for *uclinux* targets to | |
| 195 no_c99_libc_has_function, because uclibc does not, normally, have | |
| 196 c99 runtime. If, in special cases, uclibc does have c99 runtime, | |
| 197 this should be defined to a new hook. Also please note that for targets | |
| 198 like *-linux-uclibc that similar check will also need to be added to | |
| 199 linux_libc_has_function. */ | |
| 200 # undef TARGET_LIBC_HAS_FUNCTION | |
| 201 # define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function | |
| 202 | |
| 203 #else /* !uClinux, i.e., normal Linux */ | |
| 204 | |
| 205 /* Determine what functions are present at the runtime; | |
| 206 this includes full c99 runtime and sincos. */ | |
| 207 # undef TARGET_LIBC_HAS_FUNCTION | |
| 208 # define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function | |
| 209 | |
| 210 #endif |