gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux with ELF
   2    Copyright (C) 1996, 1997 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 #ifndef USE_GNULIBC_1
  39 #undef DEFAULT_VTABLE_THUNKS
  40 #define DEFAULT_VTABLE_THUNKS 1
  41 #endif
  42
  43 /* Use stabs instead of DWARF debug format.  */
  44 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  45
  46 #include <sparc/sysv4.h>
  47
  48 #undef MD_EXEC_PREFIX
  49 #undef MD_STARTFILE_PREFIX
  50
  51 /* Output at beginning of assembler file.  */
  52 /* The .file command should always begin the output.  */
  53 #undef ASM_FILE_START
  54 #define ASM_FILE_START(FILE)                                            \
  55   do {                                                                  \
  56         output_file_directive (FILE, main_input_filename);              \
  57         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  58   } while (0)
  59
  60 /* Provide a STARTFILE_SPEC appropriate for Linux.  Here we add
  61    the Linux magical crtbegin.o file (see crtstuff.c) which
  62    provides part of the support for getting C++ file-scope static
  63    object constructed before entering `main'. */
  64
  65 #undef  STARTFILE_SPEC
  66 #define STARTFILE_SPEC \
  67   "%{!shared: \
  68      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  69    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  70
  71 /* Provide a ENDFILE_SPEC appropriate for Linux.  Here we tack on
  72    the Linux magical crtend.o file (see crtstuff.c) which
  73    provides part of the support for getting C++ file-scope static
  74    object constructed before entering `main', followed by a normal
  75    Linux "finalizer" file, `crtn.o'.  */
  76
  77 #undef  ENDFILE_SPEC
  78 #define ENDFILE_SPEC \
  79   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  80
  81 /* This is for -profile to use -lc_p instead of -lc. */
  82 #undef  CC1_SPEC
  83 #define CC1_SPEC "%{profile:-p} \
  84 %{sun4:} %{target:} \
  85 %{mcypress:-mcpu=cypress} \
  86 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  87 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  88 "
  89
  90 #undef TARGET_VERSION
  91 #define TARGET_VERSION fprintf (stderr, " (sparc Linux/ELF)");
  92
  93 #undef SIZE_TYPE
  94 #define SIZE_TYPE "unsigned int"
  95
  96 #undef PTRDIFF_TYPE
  97 #define PTRDIFF_TYPE "int"
  98
  99 #undef WCHAR_TYPE
 100 #define WCHAR_TYPE "long int"
 101
 102 #undef WCHAR_TYPE_SIZE
 103 #define WCHAR_TYPE_SIZE BITS_PER_WORD
 104
 105 #undef CPP_PREDEFINES
 106 #define CPP_PREDEFINES "-D__ELF__ -Dunix -Dsparc -Dlinux -Asystem(unix) -Asystem(posix)"
 107
 108 #undef CPP_SUBTARGET_SPEC
 109 #ifdef USE_GNULIBC_1
 110 #define CPP_SUBTARGET_SPEC \
 111 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE}"
 112 #else
 113 #define CPP_SUBTARGET_SPEC \
 114 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 115 #endif
 116
 117 #undef LIB_SPEC
 118 /* We no longer link with libc_p.a or libg.a by default. If you
 119  * want to profile or debug the Linux C library, please add
 120  * -lc_p or -ggdb to LDFLAGS at the link time, respectively.
 121  */
 122 #if 1
 123 #ifdef USE_GNULIBC_1
 124 #define LIB_SPEC \
 125   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 126      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 127 #else
 128 #define LIB_SPEC \
 129   "%{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 130      %{profile:-lc_p} %{!profile: -lc}}"
 131 #endif
 132 #else
 133 #define LIB_SPEC \
 134   "%{!shared: \
 135      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 136        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 137 #endif
 138
 139 /* Provide a LINK_SPEC appropriate for Linux.  Here we provide support
 140    for the special GCC options -static and -shared, which allow us to
 141    link things in one of these three modes by applying the appropriate
 142    combinations of options at link-time. We like to support here for
 143    as many of the other GNU linker options as possible. But I don't
 144    have the time to search for those flags. I am sure how to add
 145    support for -soname shared_object_name. H.J.
 146
 147    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 148    -Wl,-V.
 149
 150    When the -shared link option is used a final link is not being
 151    done.  */
 152
 153 /* If ELF is the default format, we should not use /lib/elf. */
 154
 155 #undef  LINK_SPEC
 156 #ifdef USE_GNULIBC_1
 157 #ifndef LINUX_DEFAULT_ELF
 158 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 159   %{!shared: \
 160     %{!ibcs: \
 161       %{!static: \
 162         %{rdynamic:-export-dynamic} \
 163         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 164         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 165 #else
 166 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 167   %{!shared: \
 168     %{!ibcs: \
 169       %{!static: \
 170         %{rdynamic:-export-dynamic} \
 171         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 172         %{static:-static}}}"
 173 #endif
 174 #else
 175 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 176   %{!shared: \
 177     %{!ibcs: \
 178       %{!static: \
 179         %{rdynamic:-export-dynamic} \
 180         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 181         %{static:-static}}}"
 182 #endif
 183
 184 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 185    It's safe to pass -s always, even if -g is not used. */
 186 #undef ASM_SPEC
 187 #define ASM_SPEC \
 188   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} %{fPIC:-K PIC}"
 189
 190 /* Same as sparc.h */
 191 #undef DBX_REGISTER_NUMBER
 192 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 193
 194 /* We use stabs-in-elf for debugging, because that is what the native
 195    toolchain uses.  XXX */
 196 #undef PREFERRED_DEBUGGING_TYPE
 197 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 198
 199 #undef ASM_OUTPUT_ALIGNED_LOCAL
 200 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 201 do {                                                                    \
 202   fputs ("\t.local\t", (FILE));         \
 203   assemble_name ((FILE), (NAME));                                       \
 204   putc ('\n', (FILE));                                                  \
 205   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 206 } while (0)
 207
 208 #undef COMMON_ASM_OP
 209 #define COMMON_ASM_OP "\t.common"
 210
 211 /* This is how to output a definition of an internal numbered label where
 212    PREFIX is the class of label and NUM is the number within the class.  */
 213
 214 #undef  ASM_OUTPUT_INTERNAL_LABEL
 215 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 216   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 217
 218 /* This is how to output a reference to an internal numbered label where
 219    PREFIX is the class of label and NUM is the number within the class.  */
 220
 221 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 222 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 223   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 224
 225 /* This is how to store into the string LABEL
 226    the symbol_ref name of an internal numbered label where
 227    PREFIX is the class of label and NUM is the number within the class.
 228    This is suitable for output with `assemble_name'.  */
 229
 230 #undef  ASM_GENERATE_INTERNAL_LABEL
 231 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 232   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)
 233
 234 \f
 235 #if 0
 236 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 237    Sparc ABI says that long double is 4 words. Linux does not support
 238    long double yet.  */
 239 #define LONG_DOUBLE_TYPE_SIZE 128
 240 #endif