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/* Definitions of target machine for GNU compiler,
for PowerPC machines running Linux.
Copyright (C) 1996-2016 Free Software Foundation, Inc.
Contributed by Michael Meissner (meissner@cygnus.com).
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.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
process. */
#define OS_MISSING_POWERPC64 1
/* We use glibc _mcount for profiling. */
#define NO_PROFILE_COUNTERS 1
#ifdef SINGLE_LIBC
#define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
#define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
#define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
#undef OPTION_MUSL
#define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL)
#else
#define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
#define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
#define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
#undef OPTION_MUSL
#define OPTION_MUSL (linux_libc == LIBC_MUSL)
#endif
/* Determine what functions are present at the runtime;
this includes full c99 runtime and sincos. */
#undef TARGET_LIBC_HAS_FUNCTION
#define TARGET_LIBC_HAS_FUNCTION linux_libc_has_function
#undef TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
builtin_define_std ("PPC"); \
builtin_define_std ("powerpc"); \
builtin_assert ("cpu=powerpc"); \
builtin_assert ("machine=powerpc"); \
TARGET_OS_SYSV_CPP_BUILTINS (); \
} \
while (0)
#undef CPP_OS_DEFAULT_SPEC
#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
#undef LINK_SHLIB_SPEC
#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
#undef LIB_DEFAULT_SPEC
#define LIB_DEFAULT_SPEC "%(lib_linux)"
#undef STARTFILE_DEFAULT_SPEC
#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
#undef ENDFILE_DEFAULT_SPEC
#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
#undef LINK_START_DEFAULT_SPEC
#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
#undef LINK_OS_DEFAULT_SPEC
#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
#undef DEFAULT_ASM_ENDIAN
#if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN)
#define DEFAULT_ASM_ENDIAN " -mlittle"
#define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \
" -m elf32lppclinux", \
" -m elf32lppclinux")
#else
#define DEFAULT_ASM_ENDIAN " -mbig"
#define LINK_OS_LINUX_EMUL ENDIAN_SELECT(" -m elf32ppclinux", \
" -m elf32lppclinux", \
" -m elf32ppclinux")
#endif
#undef LINK_OS_LINUX_SPEC
#define LINK_OS_LINUX_SPEC LINK_OS_LINUX_EMUL " %{!shared: %{!static: \
%{rdynamic:-export-dynamic} \
-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
/* For backward compatibility, we must continue to use the AIX
structure return convention. */
#undef DRAFT_V4_STRUCT_RET
#define DRAFT_V4_STRUCT_RET 1
/* We are 32-bit all the time, so optimize a little. */
#undef TARGET_64BIT
#define TARGET_64BIT 0
/* We don't need to generate entries in .fixup, except when
-mrelocatable or -mrelocatable-lib is given. */
#undef RELOCATABLE_NEEDS_FIXUP
#define RELOCATABLE_NEEDS_FIXUP \
(rs6000_isa_flags & rs6000_isa_flags_explicit & OPTION_MASK_RELOCATABLE)
#ifdef TARGET_LIBC_PROVIDES_SSP
/* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */
#define TARGET_THREAD_SSP_OFFSET -0x7008
#endif
#define POWERPC_LINUX
/* ppc linux has 128-bit long double support in glibc 2.4 and later. */
#ifdef TARGET_DEFAULT_LONG_DOUBLE_128
#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
#endif
/* Static stack checking is supported by means of probes. */
#define STACK_CHECK_STATIC_BUILTIN 1
/* Software floating point support for exceptions and rounding modes
depends on the C library in use. */
#undef TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P
#define TARGET_FLOAT_EXCEPTIONS_ROUNDING_SUPPORTED_P \
rs6000_linux_float_exceptions_rounding_supported_p
/* Support for TARGET_ATOMIC_ASSIGN_EXPAND_FENV without FPRs depends
on glibc 2.19 or greater. */
#if TARGET_GLIBC_MAJOR > 2 \
|| (TARGET_GLIBC_MAJOR == 2 && TARGET_GLIBC_MINOR >= 19)
#define RS6000_GLIBC_ATOMIC_FENV 1
#endif
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