/usr/lib/gcc/x86_64-linux-gnu/4.8/plugin/include/config/linux.h is in gcc-4.8-plugin-dev 4.8.5-4ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 | /* Definitions for systems using the Linux kernel, with or without
MMU, using ELF at the compiler level but possibly FLT for final
linked executables and shared libraries in some no-MMU cases, and
possibly with a choice of libc implementations.
Copyright (C) 1995-2013 Free Software Foundation, Inc.
Contributed by Eric Youngdale.
Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* C libraries supported on Linux. */
#ifdef SINGLE_LIBC
#define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
#define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
#define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
#else
#define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
#define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
#endif
#define GNU_USER_TARGET_OS_CPP_BUILTINS() \
do { \
if (OPTION_GLIBC) \
builtin_define ("__gnu_linux__"); \
builtin_define_std ("linux"); \
builtin_define_std ("unix"); \
builtin_assert ("system=linux"); \
builtin_assert ("system=unix"); \
builtin_assert ("system=posix"); \
} while (0)
#define TARGET_OS_D_BUILTINS() TARGET_GENERIC_LINUX_OS_D_BUILTINS()
#define TARGET_GENERIC_LINUX_OS_D_BUILTINS() \
do { \
if (OPTION_GLIBC) \
builtin_define ("GNU_GLibc"); \
else if (OPTION_UCLIBC) \
builtin_define ("GNU_UCLibc"); \
else if (OPTION_BIONIC) \
builtin_define ("GNU_Bionic"); \
\
builtin_define ("linux"); \
builtin_define ("Posix"); \
} while (0)
/* Determine which dynamic linker to use depending on whether GLIBC or
uClibc or Bionic is the default C library and whether
-muclibc or -mglibc or -mbionic has been passed to change the default. */
#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3) \
"%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
#if DEFAULT_LIBC == LIBC_GLIBC
#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
#elif DEFAULT_LIBC == LIBC_UCLIBC
#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
#elif DEFAULT_LIBC == LIBC_BIONIC
#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
#else
#error "Unsupported DEFAULT_LIBC"
#endif /* DEFAULT_LIBC */
/* For most targets the following definitions suffice;
GLIBC_DYNAMIC_LINKER must be defined for each target using them, or
GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets
supporting both 32-bit and 64-bit compilation. */
#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
#define UCLIBC_DYNAMIC_LINKERX32 "/lib/ldx32-uClibc.so.0"
#define BIONIC_DYNAMIC_LINKER "/system/bin/linker"
#define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
#define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
#define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32"
#define GNU_USER_DYNAMIC_LINKER \
CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
BIONIC_DYNAMIC_LINKER)
#define GNU_USER_DYNAMIC_LINKER32 \
CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
BIONIC_DYNAMIC_LINKER32)
#define GNU_USER_DYNAMIC_LINKER64 \
CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
BIONIC_DYNAMIC_LINKER64)
#define GNU_USER_DYNAMIC_LINKERX32 \
CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
BIONIC_DYNAMIC_LINKERX32)
/* Determine whether the entire c99 runtime
is present in the runtime library. */
#undef TARGET_C99_FUNCTIONS
#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
/* Whether we have sincos that follows the GNU extension. */
#undef TARGET_HAS_SINCOS
#define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC)
/* Whether we have Bionic libc runtime */
#undef TARGET_HAS_BIONIC
#define TARGET_HAS_BIONIC (OPTION_BIONIC)
|