| /* Definitions for Rs6000 running LynxOS. |
| Copyright (C) 1995-2015 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 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/>. */ |
| |
| /* 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 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) |
| |
| /* 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 |
| |
| /* 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. */ |
| |
| static void __do_global_ctors_aux (void) __attribute__ ((longcall)); |
| #endif /* CRT_END */ |