gcc44: Instruct linkers to create GNU hash tables

[dragonfly.git] / contrib / gcc-4.4 / gcc / config / dragonfly.h

/* Base configuration file for all DragonFly targets.
   Copyright (C) 1999, 2000, 2001, 2007, 2008 Free Software Foundation, Inc.

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/>.  */

/* Common DragonFly configuration.
   All DragonFly architectures should include this file, which will specify
   their commonalities.

   Adapted from gcc/config/freebsd.h by
   Joerg Sonnenberger <joerg@bec.de>

   Adapted from gcc/config/i386/freebsd-elf.h by
   David O'Brien <obrien@FreeBSD.org>.
   Further work by David O'Brien <obrien@FreeBSD.org> and
   Loren J. Rittle <ljrittle@acm.org>.  */


/* This defines which switch letters take arguments.  On DragonFly, most of
   the normal cases (defined in gcc.c) apply, and we also have -h* and
   -z* options (for the linker) (coming from SVR4).
   We also have -R (alias --rpath), no -z, --soname (-h), --assert etc.  */

#undef  SWITCH_TAKES_ARG
#define SWITCH_TAKES_ARG(CHAR)						\
  (DEFAULT_SWITCH_TAKES_ARG (CHAR)					\
    || (CHAR) == 'h'							\
    || (CHAR) == 'z' /* ignored by ld */				\
    || (CHAR) == 'R')


#undef  WORD_SWITCH_TAKES_ARG
#define WORD_SWITCH_TAKES_ARG(STR)					\
  (DEFAULT_WORD_SWITCH_TAKES_ARG (STR)					\
   || !strcmp ((STR), "rpath")  || !strcmp ((STR), "rpath-link")	\
   || !strcmp ((STR), "soname") || !strcmp ((STR), "defsym") 		\
   || !strcmp ((STR), "assert") || !strcmp ((STR), "dynamic-linker"))

#define HANDLE_PRAGMA_PACK_PUSH_POP 1

/* JRM: 15 Nov 2010
   SWITCH_TAKES_ARG & WORD_SWITCH_TAKES_ARG removed due to poisoning
   prior to gcc 4.6.0 release.  Replaced with dragonfly.opt.
   http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02102.html
   http://gcc.gnu.org/ml/gcc-patches/2010-10/msg02373.html

   HANDLE_PRAGMA_PACK_PUSH_POP poisoned by GCC 4.6.0
   http://gcc.gnu.org/ml/gcc-patches/2010-11/msg02106.html */
   
#undef  TARGET_OS_CPP_BUILTINS
#define TARGET_OS_CPP_BUILTINS()            \
  do                                        \
    {                                       \
       builtin_define_std ("unix");         \
       builtin_define ("__DragonFly__");    \
       builtin_assert ("system=unix");      \
       builtin_assert ("system=bsd");       \
       builtin_assert ("system=DragonFly"); \
    }                                       \
  while (0)

#undef  CPP_SPEC
#define CPP_SPEC \
 "%(cpp_cpu) %(cpp_arch) %{posix:-D_POSIX_SOURCE}"

#undef  STARTFILE_SPEC
#define STARTFILE_SPEC	\
  "%{!shared: \
     %{pg:gcrt1.o%s} \
     %{!pg: \
       %{p:gcrt1.o%s} \
       %{!p: \
         %{profile: gcrt1.o%s} \
         %{!profile: \
           %{pie: Scrt1.o%s;:crt1.o%s}}}}} \
   crti.o%s \
   %{shared|pie:crtbeginS.o%s;:crtbegin.o%s}"

#undef  ENDFILE_SPEC
#define ENDFILE_SPEC \
  "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"

#undef  LIB_SPEC
#define LIB_SPEC \
  "%{pthread:-lpthread} -lc"

/* Provide a LINK_SPEC appropriate for DragonFly.  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 DFBSD_LINK_SPEC \
 "%{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
  %{v:-V} \
  %{assert*} %{R*} %{rpath*} %{defsym*} \
  %{shared:-Bshareable %{h*} %{soname*}} \
  %{!shared: \
   %{!static: \
    %{rdynamic:-export-dynamic} \
    -dynamic-linker %(dfbsd_dynamic_linker) \
   } \
  %{static:-Bstatic}} \
  %{!static:--hash-style=both} \
  %{symbolic:-Bsymbolic}"

#undef  LINK_SPEC
#define LINK_SPEC DFBSD_LINK_SPEC

#define	DFBSD_DYNAMIC_LINKER \
  "/usr/libexec/ld-elf.so.2"

#if defined(HAVE_LD_EH_FRAME_HDR)
#define LINK_EH_SPEC "--eh-frame-hdr"
#endif

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

/************************[  Target stuff  ]***********************************/

/* All DragonFly Architectures support the ELF object file format.  */
#undef  OBJECT_FORMAT_ELF
#define OBJECT_FORMAT_ELF

/* Don't assume anything about the header files.  */
#undef  NO_IMPLICIT_EXTERN_C
#define NO_IMPLICIT_EXTERN_C	1

/* Make gcc agree with DragonFly's standard headers (<machine/stdint.h>, etc...)  */

#undef  WCHAR_TYPE
#define WCHAR_TYPE "int"

/* Code generation parameters.  */

/* Use periods rather than dollar signs in special g++ assembler names.
   This ensures the configuration knows our system correctly so we can link
   with libraries compiled with the native cc.  */
#undef NO_DOLLAR_IN_LABEL

/* Used by libgcc2.c.  We support file locking with fcntl / F_SETLKW.
   This enables the test coverage code to use file locking when exiting a
   program, which avoids race conditions if the program has forked.  */
#define TARGET_POSIX_IO