Fix mv8plus, allow targetting Linux or Solaris from other sparc host.

[thirdparty/gcc.git] / gcc / config / sparc / linux.h

/* Definitions for SPARC running Linux-based GNU systems with ELF.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006,
   2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   Contributed by Eddie C. Dost (ecd@skynet.be)

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/>.  */

#define TARGET_OS_CPP_BUILTINS()		\
  do						\
    {						\
      GNU_USER_TARGET_OS_CPP_BUILTINS();	\
      if (TARGET_LONG_DOUBLE_128)       	\
	builtin_define ("__LONG_DOUBLE_128__");	\
    }						\
  while (0)

/* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
   the GNU/Linux magical crtend.o file (see crtstuff.c) which
   provides part of the support for getting C++ file-scope static
   object constructed before entering `main', followed by a normal
   GNU/Linux "finalizer" file, `crtn.o'.  */

#undef  ENDFILE_SPEC
#define ENDFILE_SPEC \
  "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s\
   %{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"

/* -mcpu=native handling only makes sense with compiler running on
   a SPARC chip.  */
#if defined(__sparc__) && defined(__linux__)
extern const char *host_detect_local_cpu (int argc, const char **argv);
# define EXTRA_SPEC_FUNCTIONS						\
  { "local_cpu_detect", host_detect_local_cpu },

# define MCPU_MTUNE_NATIVE_SPECS					\
   " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"		\
   " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
#else
# define MCPU_MTUNE_NATIVE_SPECS ""
#endif

#define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS

/* This is for -profile to use -lc_p instead of -lc.  */
#undef	CC1_SPEC
#define	CC1_SPEC "%{profile:-p} \
"

#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"
 
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"
  
#undef WCHAR_TYPE
#define WCHAR_TYPE "int"
   
#undef WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE 32

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

/* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
   for the special GCC options -static and -shared, which allow us to
   link things in one of these three modes by applying the appropriate
   combinations of options at link-time.

   When the -shared link option is used a final link is not being
   done.  */

#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"

#undef  LINK_SPEC
#define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
  %{!mno-relax:%{!r:-relax}} \
  %{!shared: \
    %{!static: \
      %{rdynamic:-export-dynamic} \
      -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
      %{static:-static}}"

/* It's safe to pass -s always, even if -g is not used.  */
#undef ASM_SPEC
#define ASM_SPEC "\
-s \
%{fpic|fPIC|fpie|fPIE:-K PIC} \
%{!.c:%{findirect-dispatch:-K PIC}} \
%(asm_cpu) %(asm_relax)"

#undef ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
do {									\
  fputs ("\t.local\t", (FILE));		\
  assemble_name ((FILE), (NAME));					\
  putc ('\n', (FILE));							\
  ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);			\
} while (0)

#undef COMMON_ASM_OP
#define COMMON_ASM_OP "\t.common\t"

#undef  LOCAL_LABEL_PREFIX
#define LOCAL_LABEL_PREFIX  "."

/* This is how to store into the string LABEL
   the symbol_ref name of an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.
   This is suitable for output with `assemble_name'.  */

#undef  ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
  sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))

\f
/* Define for support of TFmode long double.
   SPARC ABI says that long double is 4 words.  */
#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)

/* Define this to set long double type size to use in libgcc2.c, which can
   not depend on target_flags.  */
#ifdef __LONG_DOUBLE_128__
#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
#else
#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
#endif

#undef DITF_CONVERSION_LIBFUNCS
#define DITF_CONVERSION_LIBFUNCS 1
\f
#ifdef HAVE_AS_TLS
#undef TARGET_SUN_TLS
#undef TARGET_GNU_TLS
#define TARGET_SUN_TLS 0
#define TARGET_GNU_TLS 1
#endif
\f
/* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
#undef CTORS_SECTION_ASM_OP
#undef DTORS_SECTION_ASM_OP

/* Static stack checking is supported by means of probes.  */
#define STACK_CHECK_STATIC_BUILTIN 1

/* Linux currently uses RMO in uniprocessor mode, which is equivalent to
   TMO, and TMO in multiprocessor mode.  But they reserve the right to
   change their minds.  */
#undef SPARC_RELAXED_ORDERING
#define SPARC_RELAXED_ORDERING true

#undef NEED_INDICATE_EXEC_STACK
#define NEED_INDICATE_EXEC_STACK 1

#ifdef TARGET_LIBC_PROVIDES_SSP
/* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
#define TARGET_THREAD_SSP_OFFSET	0x14
#endif

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

/* We use glibc _mcount for profiling.  */
#undef NO_PROFILE_COUNTERS
#define NO_PROFILE_COUNTERS	1