/* Definitions for Rs6000 running LynxOS.
- Copyright (C) 1995, 1996, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1995, 1996, 2000, 2002, 2003, 2004, 2005, 2007
+ Free Software Foundation, Inc.
Contributed by David Henkel-Wallace, Cygnus Support (gumby@cygnus.com)
+ Rewritten by Adam Nemet, LynuxWorks Inc.
-This file is part of GNU CC.
+ This file is part of GCC.
-GNU CC 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 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.
-GNU CC 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.
+ 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 GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+ 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/>. */
-/* Definitions we want to override with those from rs6000.h: */
-#undef LIB_SPEC
-#undef PTRDIFF_TYPE
-#undef WCHAR_TYPE
-#undef WCHAR_TYPE_SIZE
-#undef ASM_FILE_START
-#undef EXTRA_SECTIONS
-#undef READONLY_DATA_SECTION
-#undef EXTRA_SECTION_FUNCTIONS
-#undef SELECT_RTX_SECTION
-#undef SELECT_SECTION
-#undef USER_LABEL_PREFIX
-#undef ASM_OUTPUT_LABELREF
-#undef ASM_OUTPUT_INTERNAL_LABEL
-#undef ASM_GENERATE_INTERNAL_LABEL
-#undef ASM_OUTPUT_COMMON
-#undef ASM_OUTPUT_LOCAL
-
-#undef SDB_DEBUGGING_INFO
-#undef DBX_DEBUGGING_INFO
-#undef PREFERRED_DEBUGGING_TYPE
+/* Override the definition in sysv4.h. */
-#undef FUNCTION_PROFILER
+#undef TARGET_VERSION
+#define TARGET_VERSION fputs (" (PowerPC/LynxOS)", stderr);
-#include <rs6000/rs6000.h>
+/* Undefine the definition to enable the LynxOS default from the
+ top-level lynx.h. */
-/* Print subsidiary information on the compiler version in use. */
-#define TARGET_VERSION fprintf (stderr, " (LynxOS-RS/6000)");
+#undef SUBTARGET_EXTRA_SPECS
-/* LynxOS has signed chars, regardless of what most R/S 6000 systems do */
-#undef DEFAULT_SIGNED_CHAR
-#define DEFAULT_SIGNED_CHAR 1
+/* Get rid off the spec definitions from rs6000/sysv4.h. */
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Acpu=rs6000 -Amachine=rs6000 -Asystem=lynx -Asystem=unix -DLynx -D_IBMR2 -Dunix -Drs6000 -Dlynx -DLYNX"
+#undef CPP_SPEC
+#define CPP_SPEC \
+"%{msoft-float: -D_SOFT_FLOAT} \
+ %(cpp_cpu) \
+ %(cpp_os_lynx)"
-#undef LINK_SPEC
-#define LINK_SPEC "-T0x10001000 -H0x1000 -D0x20000000 -btextro -bhalt:4 -bnodelcsect -bnso -bro -bnoglink %{v} %{b*}"
+/* LynxOS only supports big-endian on PPC so we override the
+ definition from sysv4.h. Since the LynxOS 4.0 compiler was set to
+ return every structure in memory regardless of their size we have
+ to emulate the same behavior here with disabling the SVR4 structure
+ returning. */
-#undef LIB_SPEC
-#define LIB_SPEC "%{mthreads:-L/lib/thread/} \
- %{msystem-v:-lc_v -lm.v} \
- %{!msystem-v:%{mposix:-lc_p} -lc -lm}"
+#undef CC1_SPEC
+#define CC1_SPEC \
+"%{G*} %{mno-sdata:-msdata=none} \
+ %{maltivec:-mabi=altivec} \
+ -maix-struct-return"
-#undef STARTFILE_SPEC
-#define STARTFILE_SPEC "%{p:%{mthreads:thread/pinit.o%s}%{!mthreads:pinit.o%s}}%{!p:%{msystem-v:vinit.o%s -e_start}%{!msystem-v:%{mthreads:thread/init.o%s}%{!mthreads:init.o%s}}}"
+#undef ASM_SPEC
+#define ASM_SPEC \
+"%(asm_cpu) \
+ %{,assembler|,assembler-with-cpp: %{mregnames} %{mno-regnames}}"
+#undef STARTFILE_SPEC
#undef ENDFILE_SPEC
+#undef LIB_SPEC
+#undef LINK_SPEC
+#define LINK_SPEC \
+"%{!msdata=none:%{G*}} %{msdata=none:-G0} \
+ %(link_os_lynx)"
-/* This can become more refined as we have more powerpc options. */
-#undef ASM_SPEC
-#define ASM_SPEC "-u %(asm_cpu)"
-
-#undef SUBTARGET_SWITCHES
-#define SUBTARGET_SWITCHES \
- {"threads", MASK_THREADS}, \
- {"posix", MASK_POSIX}, \
- {"system-v", MASK_SYSTEM_V},
-
-#undef SUBTARGET_OVERRIDE_OPTIONS
-#define SUBTARGET_OVERRIDE_OPTIONS \
-do { \
- if (TARGET_SYSTEM_V && profile_flag) \
- warning ("-msystem-v and -p are incompatible"); \
- if (TARGET_SYSTEM_V && TARGET_THREADS) \
- warning ("-msystem-v and -mthreads are incompatible"); \
-} while (0)
-
-/* For collect2 */
-#define OBJECT_FORMAT_NONE
-#undef OBJECT_FORMAT_COFF
-#undef OBJECT_FORMAT_ROSE
-#undef MD_EXEC_PREFIX
-#undef REAL_LD_FILE_NAME
-#undef REAL_STRIP_FILE_NAME
-
-/* LynxOS doesn't have mcount. */
-#undef FUNCTION_PROFILER
-#define FUNCTION_PROFILER(file, profile_label_no)
+/* Override the definition from sysv4.h. */
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ builtin_define ("__BIG_ENDIAN__"); \
+ builtin_define ("__powerpc__"); \
+ builtin_assert ("cpu=powerpc"); \
+ builtin_assert ("machine=powerpc"); \
+ builtin_define ("__PPC__"); \
+ } \
+ while (0)
+
+/* Override the rs6000.h definition. */
+
+#undef ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+/* Override the rs6000.h definition. */
+
+#undef ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+/* LynxOS does not do anything with .fixup plus let's not create
+ writable section for linkonce.r and linkonce.t. */
+
+#undef RELOCATABLE_NEEDS_FIXUP
+
+/* Override these from rs6000.h with the generic definition. */
+
+#undef SIZE_TYPE
+#undef ASM_OUTPUT_ALIGN
+#undef PREFERRED_DEBUGGING_TYPE
+
+/* The file rs6000.c defines TARGET_HAVE_TLS unconditionally to the
+ value of HAVE_AS_TLS. HAVE_AS_TLS is true as gas support for TLS
+ is detected by configure. Override the definition to false. */
+
+#undef HAVE_AS_TLS
+#define HAVE_AS_TLS 0
+
+#ifdef CRT_BEGIN
+/* This function is part of crtbegin*.o which is at the beginning of
+ the link and is called from .fini which is usually toward the end
+ of the executable. Make it longcall so that we don't limit the
+ text size of the executables to 32M. */
+
+static void __do_global_dtors_aux (void) __attribute__ ((longcall));
+#endif /* CRT_BEGIN */
+
+#ifdef CRT_END
+/* Similarly here. This function resides in crtend*.o which is toward
+ to end of the link and is called from .init which is at the
+ beginning. */
+
+static void __do_global_ctors_aux (void) __attribute__ ((longcall));
+#endif /* CRT_END */
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