/* Definitions for Rs6000 running LynxOS.
- Copyright (C) 1995, 1996, 2000, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 1995-2024 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 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
+ 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
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, 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA. */
+ 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: */
+/* Undefine the definition to enable the LynxOS default from the
+ top-level lynx.h. */
+
+#undef SUBTARGET_EXTRA_SPECS
+
+/* Get rid off the spec definitions from rs6000/sysv4.h. */
+
+#undef CPP_SPEC
+#define CPP_SPEC \
+"%{msoft-float: -D_SOFT_FLOAT} \
+ %(cpp_cpu) \
+ %(cpp_os_lynx)"
+
+/* 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 CC1_SPEC
+#define CC1_SPEC \
+"%{G*} %{mno-sdata:-msdata=none} \
+ %{maltivec:-mabi=altivec} \
+ -maix-struct-return"
+
+#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 PTRDIFF_TYPE
-#undef WCHAR_TYPE
-#undef WCHAR_TYPE_SIZE
-#undef EXTRA_SECTIONS
-#undef READONLY_DATA_SECTION
-#undef READONLY_DATA_SECTION_ASM_OP
-#undef EXTRA_SECTION_FUNCTIONS
-#undef TARGET_ASM_SELECT_RTX_SECTION
-#undef TARGET_ASM_SELECT_SECTION
-#undef USER_LABEL_PREFIX
-#undef ASM_OUTPUT_LABELREF
-#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
-
-#undef FUNCTION_PROFILER
-
-#include <rs6000/rs6000.h>
-
-/* Print subsidiary information on the compiler version in use. */
-#define TARGET_VERSION fprintf (stderr, " (LynxOS-RS/6000)");
-
-/* LynxOS has signed chars, regardless of what most R/S 6000 systems do */
-#undef DEFAULT_SIGNED_CHAR
-#define DEFAULT_SIGNED_CHAR 1
-
-#undef TARGET_OS_CPP_BUILTINS
-#define TARGET_OS_CPP_BUILTINS() \
- do \
- { \
- builtin_assert ("cpu=rs6000"); \
- builtin_assert ("machine=rs6000"); \
- builtin_assert ("system=lynx"); \
- builtin_assert ("system=unix"); \
- builtin_define_std ("Lynx"); \
- builtin_define ("_IBMR2"); \
- builtin_define_std ("unix"); \
- builtin_define_std ("rs6000"); \
- builtin_define_std ("lynx"); \
- builtin_define_std ("LYNX"); \
- } \
+#undef LINK_SPEC
+#define LINK_SPEC \
+"%{!msdata=none:%{G*}} %{msdata=none:-G0} \
+ %(link_os_lynx)"
+
+/* 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)
-#undef LINK_SPEC
-#define LINK_SPEC "-T0x10001000 -H0x1000 -D0x20000000 -btextro -bhalt:4 -bnodelcsect -bnso -bro -bnoglink %{v} %{b*}"
+/* LynxOS does not do anything with .fixup plus let's not create
+ writable section for linkonce.r and linkonce.t. */
-#undef LIB_SPEC
-#define LIB_SPEC "%{mthreads:-L/lib/thread/} \
- %{msystem-v:-lc_v -lm.v} \
- %{!msystem-v:%{mposix:-lc_p} -lc -lm}"
+#undef RELOCATABLE_NEEDS_FIXUP
-#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}}}"
+/* Override these from rs6000.h with the generic definition. */
-#undef ENDFILE_SPEC
+#undef SIZE_TYPE
+#undef ASM_OUTPUT_ALIGN
+
+/* The file rs6000.cc 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
+
+/* Use standard DWARF numbering for DWARF debugging information. */
+#define RS6000_USE_DWARF_NUMBERING
+
+#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. */
-/* 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 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)
+static void __do_global_ctors_aux (void) __attribute__ ((longcall));
+#endif /* CRT_END */
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