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