| /* 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, 1996, 1997, 1998, 1999, 2000, 2003, 2004, 2005, 2006, |
| 2007, 2009, 2010, 2011 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 LINUX_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) |
| |
| /* 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 BIONIC_DYNAMIC_LINKER "/system/bin/linker" |
| #define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker" |
| #define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64" |
| |
| #define LINUX_DYNAMIC_LINKER \ |
| CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \ |
| BIONIC_DYNAMIC_LINKER) |
| #define LINUX_DYNAMIC_LINKER32 \ |
| CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \ |
| BIONIC_DYNAMIC_LINKER32) |
| #define LINUX_DYNAMIC_LINKER64 \ |
| CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \ |
| BIONIC_DYNAMIC_LINKER64) |
| |
| /* Determine whether the entire c99 runtime |
| is present in the runtime library. */ |
| #define TARGET_C99_FUNCTIONS (OPTION_GLIBC) |
| |
| /* Whether we have sincos that follows the GNU extension. */ |
| #define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC) |
