gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux with ELF
   2    Copyright (C) 1996 Free Software Foundation, Inc.
   3    Contributed by Eddie C. Dost (ecd@skynet.be)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #define LINUX_DEFAULT_ELF
  23
  24 /* Don't assume anything about the header files. */
  25 #define NO_IMPLICIT_EXTERN_C
  26
  27 #undef HAVE_ATEXIT
  28 #define HAVE_ATEXIT
  29
  30 /* Linux uses ctype from glibc.a. I am not sure how complete it is.
  31    For now, we play safe. It may change later. */
  32
  33 #if 0
  34 #undef MULTIBYTE_CHARS
  35 #define MULTIBYTE_CHARS 1
  36 #endif
  37
  38 /* There are conflicting reports about whether this system uses
  39    a different assembler syntax.  wilson@cygnus.com says # is right.  */
  40 #undef COMMENT_BEGIN
  41 #define COMMENT_BEGIN "#"
  42
  43 /* Use stabs instead of DWARF debug format.  */
  44 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  45 #include <sparc/sysv4.h>
  46
  47 #undef MD_EXEC_PREFIX
  48 #undef MD_STARTFILE_PREFIX
  49
  50 /* Output at beginning of assembler file.  */
  51 /* The .file command should always begin the output.  */
  52 #undef ASM_FILE_START
  53 #define ASM_FILE_START(FILE)                                            \
  54   do {                                                                  \
  55         output_file_directive (FILE, main_input_filename);              \
  56         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  57   } while (0)
  58
  59 #undef  LIBGCC_SPEC
  60 #define LIBGCC_SPEC \
  61   "%{!shared:-lgcc}"
  62
  63 /* Provide a STARTFILE_SPEC appropriate for Linux.  Here we add
  64    the Linux magical crtbegin.o file (see crtstuff.c) which
  65    provides part of the support for getting C++ file-scope static
  66    object constructed before entering `main'. */
  67
  68 #undef  STARTFILE_SPEC
  69 #define STARTFILE_SPEC \
  70   "%{!shared: \
  71      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  72    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  73
  74 /* Provide a ENDFILE_SPEC appropriate for Linux.  Here we tack on
  75    the Linux magical crtend.o file (see crtstuff.c) which
  76    provides part of the support for getting C++ file-scope static
  77    object constructed before entering `main', followed by a normal
  78    Linux "finalizer" file, `crtn.o'.  */
  79
  80 #undef  ENDFILE_SPEC
  81 #define ENDFILE_SPEC \
  82   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  83
  84 #undef TARGET_VERSION
  85 #define TARGET_VERSION fprintf (stderr, " (sparc Linux/ELF)");
  86
  87 #undef SIZE_TYPE
  88 #define SIZE_TYPE "unsigned int"
  89
  90 #undef PTRDIFF_TYPE
  91 #define PTRDIFF_TYPE "int"
  92
  93 #undef WCHAR_TYPE
  94 #define WCHAR_TYPE "long int"
  95
  96 #undef WCHAR_TYPE_SIZE
  97 #define WCHAR_TYPE_SIZE BITS_PER_WORD
  98
  99 #undef CPP_PREDEFINES
 100 #define CPP_PREDEFINES "-D__ELF__ -Dunix -Dsparc -Dlinux -Asystem(unix) -Asystem(posix) -Acpu(sparc) -Amachine(sparc)"
 101
 102 #undef CPP_SPEC
 103 #define CPP_SPEC "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{msparclite:-D__sparclite__} %{mv8:-D__sparc_v8__} %{msupersparc:-D__supersparc__ -D__sparc_v8__} %{posix:-D_POSIX_SOURCE}"
 104
 105 #undef LIB_SPEC
 106 #if 1
 107 /* We no longer link with libc_p.a or libg.a by default. If you
 108  * want to profile or debug the Linux C library, please add
 109  * -lc_p or -ggdb to LDFLAGS at the link time, respectively.
 110  */
 111 #define LIB_SPEC \
 112   "%{!shared: %{mieee-fp:-lieee} %{p:-lgmon} %{pg:-lgmon} \
 113      %{!ggdb:-lc} %{ggdb:-lg}}"
 114 #else
 115 #define LIB_SPEC \
 116   "%{!shared: \
 117      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 118        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 119 #endif
 120
 121 /* Provide a LINK_SPEC appropriate for Linux.  Here we provide support
 122    for the special GCC options -static and -shared, which allow us to
 123    link things in one of these three modes by applying the appropriate
 124    combinations of options at link-time. We like to support here for
 125    as many of the other GNU linker options as possible. But I don't
 126    have the time to search for those flags. I am sure how to add
 127    support for -soname shared_object_name. H.J.
 128
 129    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 130    -Wl,-V.
 131
 132    When the -shared link option is used a final link is not being
 133    done.  */
 134
 135 /* If ELF is the default format, we should not use /lib/elf. */
 136
 137 #undef  LINK_SPEC
 138 #ifndef LINUX_DEFAULT_ELF
 139 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 140   %{!shared: \
 141     %{!ibcs: \
 142       %{!static: \
 143         %{rdynamic:-export-dynamic} \
 144         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 145         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 146 #else
 147 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 148   %{!shared: \
 149     %{!ibcs: \
 150       %{!static: \
 151         %{rdynamic:-export-dynamic} \
 152         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 153         %{static:-static}}}"
 154 #endif
 155
 156 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 157    It's safe to pass -s always, even if -g is not used. */
 158 #undef ASM_SPEC
 159 #define ASM_SPEC \
 160   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} %{fPIC:-K PIC}"
 161
 162 /* Same as sparc.h */
 163 #undef DBX_REGISTER_NUMBER
 164 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 165
 166 /* We use stabs-in-elf for debugging, because that is what the native
 167    toolchain uses.  XXX */
 168 #undef PREFERRED_DEBUGGING_TYPE
 169 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 170
 171 #undef ASM_OUTPUT_ALIGNED_LOCAL
 172 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 173 do {                                                                    \
 174   fputs ("\t.local\t", (FILE));         \
 175   assemble_name ((FILE), (NAME));                                       \
 176   putc ('\n', (FILE));                                                  \
 177   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 178 } while (0)
 179
 180 #undef COMMON_ASM_OP
 181 #define COMMON_ASM_OP "\t.common"
 182
 183 /* This is how to output a definition of an internal numbered label where
 184    PREFIX is the class of label and NUM is the number within the class.  */
 185
 186 #undef  ASM_OUTPUT_INTERNAL_LABEL
 187 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 188   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 189
 190 /* This is how to output a reference to an internal numbered label where
 191    PREFIX is the class of label and NUM is the number within the class.  */
 192
 193 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 194 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 195   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 196
 197 /* This is how to store into the string LABEL
 198    the symbol_ref name of an internal numbered label where
 199    PREFIX is the class of label and NUM is the number within the class.
 200    This is suitable for output with `assemble_name'.  */
 201
 202 #undef  ASM_GENERATE_INTERNAL_LABEL
 203 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 204   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)
 205
 206 \f
 207 #if 0
 208 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 209    Sparc ABI says that long double is 4 words. Linux does not support
 210    long double yet.  */
 211 #define LONG_DOUBLE_TYPE_SIZE 128
 212 #endif