1 /* Operating system specific defines to be used when targeting GCC for 2 Sequent's Dynix/ptx v4 and later. 3 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc. 4 Generic SysV4 file Contributed by Ron Guilmette (rfg@monkeys.com). 5 Renamed and changed to suit Dynix/ptx v4 and later. 6 Modified by Tim Wright (timw@sequent.com). 7 Modified by Janis Johnson (janis@us.ibm.com). 8 9 This file is part of GCC. 10 11 GCC is free software; you can redistribute it and/or modify 12 it under the terms of the GNU General Public License as published by 13 the Free Software Foundation; either version 2, or (at your option) 14 any later version. 15 16 GCC is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 GNU General Public License for more details. 20 21 You should have received a copy of the GNU General Public License 22 along with GCC; see the file COPYING. If not, write to 23 the Free Software Foundation, 59 Temple Place - Suite 330, 24 Boston, MA 02111-1307, USA. 25 26 */ 27 28 /* Define a symbol indicating that we are using svr4.h. */ 29 #define USING_SVR4_H 30 31 /* Use DWARF 2 debugging info by default. */ 32 33 #undef PREFERRED_DEBUGGING_TYPE 34 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 35 36 #define DWARF2_DEBUGGING_INFO 1 37 38 /* Cpp, assembler, linker, library, and startfile spec's. */ 39 40 /* This defines which switch letters take arguments. On svr4, most of 41 the normal cases (defined in gcc.c) apply, and we also have -h* and 42 -z* options (for the linker). Note however that there is no such 43 thing as a -T option for svr4. */ 44 45 #define SWITCH_TAKES_ARG(CHAR) \ 46 ( (CHAR) == 'D' \ 47 || (CHAR) == 'U' \ 48 || (CHAR) == 'o' \ 49 || (CHAR) == 'e' \ 50 || (CHAR) == 'u' \ 51 || (CHAR) == 'I' \ 52 || (CHAR) == 'm' \ 53 || (CHAR) == 'L' \ 54 || (CHAR) == 'A' \ 55 || (CHAR) == 'h' \ 56 || (CHAR) == 'z') 57 58 /* This defines which multi-letter switches take arguments. On svr4, 59 there are no such switches except those implemented by GCC itself. */ 60 61 #define WORD_SWITCH_TAKES_ARG(STR) \ 62 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \ 63 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \ 64 && strcmp (STR, "Tbss")) 65 66 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as 67 many of the specialized svr4 assembler options as seems reasonable, 68 given that there are certain options which we can't (or shouldn't) 69 support directly due to the fact that they conflict with other options 70 for other svr4 tools (e.g. ld) or with other options for GCC itself. 71 For example, we don't support the -o (output file) or -R (remove 72 input file) options because GCC already handles these things. We 73 also don't support the -m (run m4) option for the assembler because 74 that conflicts with the -m (produce load map) option of the svr4 75 linker. We do however allow passing arbitrary options to the svr4 76 assembler via the -Wa, option. 77 78 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,* 79 option. 80 */ 81 82 #undef ASM_SPEC 83 #ifdef USE_GAS 84 #define ASM_SPEC \ 85 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}" 86 #else 87 #define ASM_SPEC \ 88 "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}" 89 #endif 90 91 #define AS_NEEDS_DASH_FOR_PIPED_INPUT 92 93 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default 94 standard C library (unless we are building a shared library). */ 95 96 #undef LIB_SPEC 97 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}" 98 99 /* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude 100 libgcc when -symbolic. */ 101 102 #undef LIBGCC_SPEC 103 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}" 104 105 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own 106 magical crtend.o file (see crtstuff.c) which provides part of the 107 support for getting C++ file-scope static object constructed before 108 entering `main', followed by the normal svr3/svr4 "finalizer" file, 109 which is either `gcrtn.o' or `crtn.o'. */ 110 111 #undef ENDFILE_SPEC 112 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}" 113 114 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support 115 for the special GCC options -static, -shared, and -symbolic which 116 allow us to link things in one of these three modes by applying the 117 appropriate combinations of options at link-time. We also provide 118 support here for as many of the other svr4 linker options as seems 119 reasonable, given that some of them conflict with options for other 120 svr4 tools (e.g. the assembler). In particular, we do support the 121 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, 122 -l*, -o*, -r, -s, -u*, and -L* options are directly supported 123 by gcc.c itself. We don't directly support the -m (generate load 124 map) option because that conflicts with the -m (run m4) option of 125 the svr4 assembler. We also don't directly support the svr4 linker's 126 -I* or -M* options because these conflict with existing GCC options. 127 We do however allow passing arbitrary options to the svr4 linker 128 via the -Wl, option. We don't support the svr4 linker's -a option 129 at all because it is totally useless and because it conflicts with 130 GCC's own -a option. 131 132 Note that gcc doesn't allow a space to follow -Y in a -YP,* option. 133 134 When the -G link option is used (-shared and -symbolic) a final link is 135 not being done. */ 136 137 #undef LINK_SPEC 138 #define LINK_SPEC "%{h*} %{v:-V} \ 139 %{b} %{Wl,*:%*} \ 140 %{static:-dn -Bstatic} \ 141 %{shared:-G -dy -z text} \ 142 %{symbolic:-Bsymbolic -G -dy -z text} \ 143 %{G:-G} \ 144 %{YP,*} \ 145 %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \ 146 %{!p:-Y P,/lib:/usr/lib}} \ 147 %{Qy:} %{!Qn:-Qy}" 148 149 /* Gcc automatically adds in one of the files /lib/values-Xc.o 150 or /lib/values-Xa.o, for each final link step (depending upon the other 151 gcc options selected, such as -ansi). These files each contain one 152 (initialized) copy of a special variable called `_lib_version'. Each 153 one of these files has `_lib_version' initialized to a different (enum) 154 value. The SVR4 library routines query the value of `_lib_version' 155 at run to decide how they should behave. Specifically, they decide 156 (based upon the value of `_lib_version') if they will act in a strictly 157 ANSI conforming manner or not. 158 */ 159 160 #undef STARTFILE_SPEC 161 #define STARTFILE_SPEC "%{!shared: \ 162 %{!symbolic: \ 163 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\ 164 %{pg:gcrti.o%s}%{!pg:crti.o%s} \ 165 %{ansi:values-Xc.o%s} \ 166 %{!ansi:values-Xa.o%s} \ 167 crtbegin.o%s" 168 169 /* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6. */ 170 171 #undef HAVE_BCOPY 172 173 /* The numbers used to denote specific machine registers in the System V 174 Release 4 DWARF debugging information are quite likely to be totally 175 different from the numbers used in BSD stabs debugging information 176 for the same kind of target machine. Thus, we undefine the macro 177 DBX_REGISTER_NUMBER here as an extra inducement to get people to 178 provide proper machine-specific definitions of DBX_REGISTER_NUMBER 179 (which is also used to provide DWARF registers numbers in dwarfout.c) 180 in their tm.h files which include this file. */ 181 182 #undef DBX_REGISTER_NUMBER 183 184 /* Like block addresses, stabs line numbers are relative to the 185 current function. */ 186 187 #undef ASM_OUTPUT_SOURCE_LINE 188 #define ASM_OUTPUT_SOURCE_LINE(file, line, counter) \ 189 do \ 190 { \ 191 fprintf (file, ".stabn 68,0,%d,.LM%d-", \ 192 line, counter); \ 193 assemble_name (file, \ 194 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\ 195 fprintf (file, "\n.LM%d:\n", counter); \ 196 } \ 197 while (0) 198 199 /* Generate a blank trailing N_SO to mark the end of the .o file, since 200 we can't depend upon the linker to mark .o file boundaries with 201 embedded stabs. */ 202 203 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END 204 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \ 205 fprintf (FILE, \ 206 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO) 207 208 /* Define the actual types of some ANSI-mandated types. (These 209 definitions should work for most SVR4 systems). */ 210 211 #undef SIZE_TYPE 212 #define SIZE_TYPE "unsigned int" 213 214 #undef PTRDIFF_TYPE 215 #define PTRDIFF_TYPE "int" 216 217 #undef WCHAR_TYPE 218 #define WCHAR_TYPE "long int" 219 220 #undef WCHAR_TYPE_SIZE 221 #define WCHAR_TYPE_SIZE BITS_PER_WORD 222 223 /* This says how to output assembler code to declare an uninitialized 224 external linkage data item. There's a bug in the DYNIX/ptx linker 225 (PR 254649) when the alignment for such an object is specified, so 226 ignore the ALIGN parameter. */ 227 228 #undef ASM_OUTPUT_ALIGNED_COMMON 229 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 230 do { \ 231 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 232 assemble_name ((FILE), (NAME)); \ 233 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE)); \ 234 } while (0) 235 236