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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [config/] [alpha/] [osf.h] - Blame information for rev 816

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/* Definitions of target machine for GNU compiler, for DEC Alpha on OSF/1.
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   Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 2001, 2002, 2003,
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   2004, 2007 Free Software Foundation, Inc.
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   Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu)
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public 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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/* As of OSF 4.0, as can subtract adjacent labels.  */
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#undef TARGET_AS_CAN_SUBTRACT_LABELS
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#define TARGET_AS_CAN_SUBTRACT_LABELS 1
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/* The GEM libraries for X_float are present, though not used by C.  */
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#undef TARGET_HAS_XFLOATING_LIBS
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#define TARGET_HAS_XFLOATING_LIBS 1
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/* Names to predefine in the preprocessor for this target machine.  */
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#define TARGET_OS_CPP_BUILTINS()                        \
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    do {                                                \
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        builtin_define_std ("unix");                    \
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        builtin_define_std ("SYSTYPE_BSD");             \
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        builtin_define ("_SYSTYPE_BSD");                \
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        builtin_define ("__osf__");                     \
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        builtin_define ("__digital__");                 \
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        builtin_define ("__arch64__");                  \
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        builtin_define ("_LONGLONG");                   \
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        builtin_assert ("system=unix");                 \
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        builtin_assert ("system=xpg4");                 \
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        /* Tru64 UNIX V5 has a 16 byte long             \
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           double type and requires __X_FLOAT           \
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           to be defined for <math.h>.  */              \
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        if (LONG_DOUBLE_TYPE_SIZE == 128)               \
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          builtin_define ("__X_FLOAT");                 \
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                                                        \
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        /* Tru64 UNIX V4/V5 provide several ISO C94     \
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           features protected by the corresponding      \
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           __STDC_VERSION__ macro.  libstdc++ v3        \
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           needs them as well.  */                      \
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        if (c_dialect_cxx ())                           \
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          builtin_define ("__STDC_VERSION__=199409L");  \
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    } while (0)
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/* Accept DEC C flags for multithreaded programs.  We use _PTHREAD_USE_D4
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   instead of PTHREAD_USE_D4 since both have the same effect and the former
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   doesn't invade the users' namespace.  */
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#undef CPP_SUBTARGET_SPEC
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#define CPP_SUBTARGET_SPEC \
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"%{pthread|threads:-D_REENTRANT} %{threads:-D_PTHREAD_USE_D4}"
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/* Under OSF4, -p and -pg require -lprof1, and -lprof1 requires -lpdf.  */
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#define LIB_SPEC \
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"%{p|pg:-lprof1%{pthread|threads:_r} -lpdf} %{a:-lprof2} \
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 %{threads: -lpthreads} %{pthread|threads: -lpthread -lmach -lexc} -lc"
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/* Pass "-G 8" to ld because Alpha's CC does.  Pass -O3 if we are
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   optimizing, -O1 if we are not.  Pass -S to silence `weak symbol
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   multiply defined' warnings.  Pass -shared, -non_shared or
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   -call_shared as appropriate.  Pass -hidden_symbol so that our
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   constructor and call-frame data structures are not accidentally
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   overridden.  */
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#define LINK_SPEC  \
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  "-G 8 %{O*:-O3} %{!O*:-O1} -S %{static:-non_shared} \
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   %{!static:%{shared:-shared -hidden_symbol _GLOBAL_*} \
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   %{!shared:-call_shared}} %{pg} %{taso} %{rpath*}"
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#define STARTFILE_SPEC  \
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  "%{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}"
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#define ENDFILE_SPEC \
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  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
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#define MD_STARTFILE_PREFIX "/usr/lib/cmplrs/cc/"
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/* Tru64 UNIX V5.1 requires a special as flag.  Empty by default.  */
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#define ASM_OLDAS_SPEC ""
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/* In OSF/1 v3.2c, the assembler by default does not output file names which
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   causes mips-tfile to fail.  Passing -g to the assembler fixes this problem.
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   ??? Strictly speaking, we need -g only if the user specifies -g.  Passing
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   it always means that we get slightly larger than necessary object files
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   if the user does not specify -g.  If we don't pass -g, then mips-tfile
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   will need to be fixed to work in this case.  Pass -O0 since some
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   optimization are broken and don't help us anyway.  Pass -nocpp because
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   there's no point in running CPP on our assembler output.  */
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#if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
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#define ASM_SPEC "%{malpha-as:-g %(asm_oldas) -nocpp %{pg} -O0}"
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#else
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#define ASM_SPEC "%{!mgas:-g %(asm_oldas) -nocpp %{pg} -O0}"
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#endif
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/* Specify to run a post-processor, mips-tfile after the assembler
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   has run to stuff the ecoff debug information into the object file.
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   This is needed because the Alpha assembler provides no way
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   of specifying such information in the assembly file.  */
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#if ((TARGET_DEFAULT | TARGET_CPU_DEFAULT) & MASK_GAS) != 0
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#define ASM_FINAL_SPEC "\
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%{malpha-as: %{!mno-mips-tfile: \
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        \n mips-tfile %{v*: -v} \
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                %{K: -I %b.o~} \
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                %{!K: %{save-temps: -I %b.o~}} \
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                %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
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                %{.s:%i} %{!.s:%g.s}}}"
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#else
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#define ASM_FINAL_SPEC "\
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%{!mgas: %{!mno-mips-tfile: \
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        \n mips-tfile %{v*: -v} \
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                %{K: -I %b.o~} \
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                %{!K: %{save-temps: -I %b.o~}} \
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                %{c:%W{o*}%{!o*:-o %b.o}}%{!c:-o %U.o} \
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                %{.s:%i} %{!.s:%g.s}}}"
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#endif
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#undef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS { "asm_oldas", ASM_OLDAS_SPEC }
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/* Indicate that we have a stamp.h to use.  */
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#ifndef CROSS_COMPILE
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#define HAVE_STAMP_H 1
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#endif
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/* Attempt to turn on access permissions for the stack.  */
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#define ENABLE_EXECUTE_STACK                                            \
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void                                                                    \
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__enable_execute_stack (void *addr)                                     \
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{                                                                       \
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  extern int mprotect (const void *, size_t, int);                      \
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  long size = getpagesize ();                                           \
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  long mask = ~(size-1);                                                \
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  char *page = (char *) (((long) addr) & mask);                         \
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  char *end  = (char *) ((((long) (addr + TRAMPOLINE_SIZE)) & mask) + size); \
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                                                                        \
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  /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */                         \
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  if (mprotect (page, end - page, 7) < 0)                               \
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    perror ("mprotect of trampoline code");                             \
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}
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/* Digital UNIX V4.0E (1091)/usr/include/sys/types.h 4.3.49.9 1997/08/14 */
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#define SIZE_TYPE       "long unsigned int"
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#define PTRDIFF_TYPE    "long int"
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/* The linker will stick __main into the .init section.  */
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#define HAS_INIT_SECTION
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#define LD_INIT_SWITCH "-init"
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#define LD_FINI_SWITCH "-fini"
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/* The linker needs a space after "-o".  This allows -oldstyle_liblookup to
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   be passed to ld.  */
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#define SWITCHES_NEED_SPACES "o"
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/* Select a format to encode pointers in exception handling data.  CODE
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   is 0 for data, 1 for code labels, 2 for function pointers.  GLOBAL is
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   true if the symbol may be affected by dynamic relocations.
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   We really ought to be using the SREL32 relocations that ECOFF has,
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   but no version of the native assembler supports creating such things,
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   and Compaq has no plans to rectify this.  Worse, the dynamic loader
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   cannot handle unaligned relocations, so we have to make sure that
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   things get padded appropriately.  */
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                            \
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  (TARGET_GAS                                                                \
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   ? (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4) \
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   : DW_EH_PE_aligned)
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/* This is how we tell the assembler that a symbol is weak.  */
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#define ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, VALUE)        \
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  do                                                    \
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    {                                                   \
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      (*targetm.asm_out.globalize_label) (FILE, NAME);  \
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      fputs ("\t.weakext\t", FILE);                     \
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      assemble_name (FILE, NAME);                       \
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      if (VALUE)                                        \
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        {                                               \
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          fputc (' ', FILE);                            \
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          assemble_name (FILE, VALUE);                  \
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        }                                               \
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      fputc ('\n', FILE);                               \
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    }                                                   \
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  while (0)
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#define ASM_WEAKEN_LABEL(FILE, NAME) ASM_OUTPUT_WEAK_ALIAS(FILE, NAME, 0)
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/* Handle #pragma weak and #pragma pack.  */
208
#define HANDLE_SYSV_PRAGMA 1
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/* Handle #pragma extern_prefix.  Technically only needed for Tru64 5.x,
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   but easier to manipulate preprocessor bits from here.  */
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#define TARGET_HANDLE_PRAGMA_EXTERN_PREFIX 1

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