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110 lines
4.4 KiB
C
110 lines
4.4 KiB
C
/* Definitions for systems using the Linux kernel, with or without
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MMU, using ELF at the compiler level but possibly FLT for final
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linked executables and shared libraries in some no-MMU cases, and
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possibly with a choice of libc implementations.
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Copyright (C) 1995-2013 Free Software Foundation, Inc.
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Contributed by Eric Youngdale.
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Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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/* C libraries supported on Linux. */
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#ifdef SINGLE_LIBC
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#define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
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#define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
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#define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
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#else
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#define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
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#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
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#define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
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#endif
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#define GNU_USER_TARGET_OS_CPP_BUILTINS() \
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do { \
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if (OPTION_GLIBC) \
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builtin_define ("__gnu_linux__"); \
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builtin_define_std ("linux"); \
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builtin_define_std ("unix"); \
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builtin_assert ("system=linux"); \
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builtin_assert ("system=unix"); \
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builtin_assert ("system=posix"); \
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} while (0)
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/* Determine which dynamic linker to use depending on whether GLIBC or
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uClibc or Bionic is the default C library and whether
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-muclibc or -mglibc or -mbionic has been passed to change the default. */
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#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3) \
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"%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
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#if DEFAULT_LIBC == LIBC_GLIBC
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#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
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CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
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#elif DEFAULT_LIBC == LIBC_UCLIBC
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#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
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CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
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#elif DEFAULT_LIBC == LIBC_BIONIC
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#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
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CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
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#else
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#error "Unsupported DEFAULT_LIBC"
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#endif /* DEFAULT_LIBC */
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/* For most targets the following definitions suffice;
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GLIBC_DYNAMIC_LINKER must be defined for each target using them, or
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GLIBC_DYNAMIC_LINKER32 and GLIBC_DYNAMIC_LINKER64 for targets
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supporting both 32-bit and 64-bit compilation. */
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#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
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#define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
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#define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
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#define UCLIBC_DYNAMIC_LINKERX32 "/lib/ldx32-uClibc.so.0"
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#define BIONIC_DYNAMIC_LINKER "/system/bin/linker"
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#define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
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#define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
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#define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32"
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#define GNU_USER_DYNAMIC_LINKER \
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CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
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BIONIC_DYNAMIC_LINKER)
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#define GNU_USER_DYNAMIC_LINKER32 \
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CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
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BIONIC_DYNAMIC_LINKER32)
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#define GNU_USER_DYNAMIC_LINKER64 \
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CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
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BIONIC_DYNAMIC_LINKER64)
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#define GNU_USER_DYNAMIC_LINKERX32 \
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CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
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BIONIC_DYNAMIC_LINKERX32)
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/* Determine whether the entire c99 runtime
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is present in the runtime library. */
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#undef TARGET_C99_FUNCTIONS
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#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
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/* Whether we have sincos that follows the GNU extension. */
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#undef TARGET_HAS_SINCOS
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#define TARGET_HAS_SINCOS (OPTION_GLIBC || OPTION_BIONIC)
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/* Whether we have Bionic libc runtime */
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#undef TARGET_HAS_BIONIC
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#define TARGET_HAS_BIONIC (OPTION_BIONIC)
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