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jeremybenn |
/* Definitions for Rs6000 running LynxOS.
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Copyright (C) 1995, 1996, 2000, 2002, 2003, 2004, 2005, 2007, 2010, 2011
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Free Software Foundation, Inc.
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Contributed by David Henkel-Wallace, Cygnus Support (gumby@cygnus.com)
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Rewritten by Adam Nemet, LynuxWorks Inc.
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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 it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* Undefine the definition to enable the LynxOS default from the
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top-level lynx.h. */
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#undef SUBTARGET_EXTRA_SPECS
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/* Get rid off the spec definitions from rs6000/sysv4.h. */
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#undef CPP_SPEC
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#define CPP_SPEC \
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"%{msoft-float: -D_SOFT_FLOAT} \
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%(cpp_cpu) \
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%(cpp_os_lynx)"
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/* LynxOS only supports big-endian on PPC so we override the
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definition from sysv4.h. Since the LynxOS 4.0 compiler was set to
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return every structure in memory regardless of their size we have
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to emulate the same behavior here with disabling the SVR4 structure
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returning. */
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#undef CC1_SPEC
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#define CC1_SPEC \
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"%{G*} %{mno-sdata:-msdata=none} \
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%{maltivec:-mabi=altivec} \
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-maix-struct-return"
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#undef ASM_SPEC
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#define ASM_SPEC \
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"%(asm_cpu) \
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%{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}"
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#undef STARTFILE_SPEC
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#undef ENDFILE_SPEC
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#undef LIB_SPEC
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#undef LINK_SPEC
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#define LINK_SPEC \
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"%{!msdata=none:%{G*}} %{msdata=none:-G0} \
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%(link_os_lynx)"
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/* Override the definition from sysv4.h. */
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#undef TARGET_OS_CPP_BUILTINS
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__BIG_ENDIAN__"); \
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builtin_define ("__powerpc__"); \
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builtin_assert ("cpu=powerpc"); \
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builtin_assert ("machine=powerpc"); \
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builtin_define ("__PPC__"); \
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} \
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while (0)
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/* Override the rs6000.h definition. */
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#undef ASM_APP_ON
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#define ASM_APP_ON "#APP\n"
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/* Override the rs6000.h definition. */
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#undef ASM_APP_OFF
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#define ASM_APP_OFF "#NO_APP\n"
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/* LynxOS does not do anything with .fixup plus let's not create
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writable section for linkonce.r and linkonce.t. */
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#undef RELOCATABLE_NEEDS_FIXUP
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/* Override these from rs6000.h with the generic definition. */
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#undef SIZE_TYPE
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#undef ASM_OUTPUT_ALIGN
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#undef PREFERRED_DEBUGGING_TYPE
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/* The file rs6000.c defines TARGET_HAVE_TLS unconditionally to the
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value of HAVE_AS_TLS. HAVE_AS_TLS is true as gas support for TLS
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is detected by configure. Override the definition to false. */
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#undef HAVE_AS_TLS
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#define HAVE_AS_TLS 0
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#define DBX_REGISTER_NUMBER(REGNO) rs6000_dbx_register_number (REGNO)
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#ifdef CRT_BEGIN
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/* This function is part of crtbegin*.o which is at the beginning of
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the link and is called from .fini which is usually toward the end
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of the executable. Make it longcall so that we don't limit the
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text size of the executables to 32M. */
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static void __do_global_dtors_aux (void) __attribute__ ((longcall));
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#endif /* CRT_BEGIN */
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#ifdef CRT_END
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/* Similarly here. This function resides in crtend*.o which is toward
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to end of the link and is called from .init which is at the
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beginning. */
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static void __do_global_ctors_aux (void) __attribute__ ((longcall));
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#endif /* CRT_END */
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