llvm-gcc-4.2/gcc/config/alpha/linux.h

/* Definitions of target machine for GNU compiler,
   for Alpha Linux-based GNU systems.
   Copyright (C) 1996, 1997, 1998, 2002, 2003, 2004, 2005, 2006
   Free Software Foundation, Inc.
   Contributed by Richard Henderson.

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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.  */

#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_FPREGS | MASK_GAS)

#define TARGET_OS_CPP_BUILTINS()				\
    do {							\
	builtin_define ("__gnu_linux__");			\
	builtin_define ("_LONGLONG");				\
	builtin_define_std ("linux");				\
	builtin_define_std ("unix");				\
	builtin_assert ("system=linux");			\
	builtin_assert ("system=unix");				\
	builtin_assert ("system=posix");			\
	/* The GNU C++ standard library requires this.  */	\
	if (c_dialect_cxx ())					\
	  builtin_define ("_GNU_SOURCE");			\
    } while (0)

#undef LIB_SPEC
#define LIB_SPEC \
  "%{pthread:-lpthread} \
   %{shared:-lc} \
   %{!shared: %{profile:-lc_p}%{!profile:-lc}}"

#undef CPP_SPEC
#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"

/* Show that we need a GP when profiling.  */
#undef TARGET_PROFILING_NEEDS_GP
#define TARGET_PROFILING_NEEDS_GP 1

/* Don't care about faults in the prologue.  */
#undef TARGET_CAN_FAULT_IN_PROLOGUE
#define TARGET_CAN_FAULT_IN_PROLOGUE 1

/* OS fixes up EV5 data fault on prefetch.  */
#undef TARGET_FIXUP_EV5_PREFETCH
#define TARGET_FIXUP_EV5_PREFETCH 1

#undef WCHAR_TYPE
#define WCHAR_TYPE "int"

/* Define this so that all GNU/Linux targets handle the same pragmas.  */
#define HANDLE_PRAGMA_PACK_PUSH_POP

/* Determine whether the entire c99 runtime is present in the
   runtime library.  */
#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)

#define TARGET_POSIX_IO

#define LINK_GCC_C_SEQUENCE_SPEC \
  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"

/* Use --as-needed -lgcc_s for eh support.  */
#ifdef HAVE_LD_AS_NEEDED
#define USE_LD_AS_NEEDED 1
#endif

#define MD_UNWIND_SUPPORT "config/alpha/linux-unwind.h"

/* Define if long doubles should be mangled as 'g'.  */
#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING