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, 2004 4 Free Software Foundation, Inc. 5 Generic SysV4 file Contributed by Ron Guilmette (rfg@monkeys.com). 6 Renamed and changed to suit Dynix/ptx v4 and later. 7 Modified by Tim Wright (timw@sequent.com). 8 Modified by Janis Johnson (janis@us.ibm.com). 9 10This file is part of GCC. 11 12GCC is free software; you can redistribute it and/or modify 13it under the terms of the GNU General Public License as published by 14the Free Software Foundation; either version 2, or (at your option) 15any later version. 16 17GCC is distributed in the hope that it will be useful, 18but WITHOUT ANY WARRANTY; without even the implied warranty of 19MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20GNU General Public License for more details. 21 22You should have received a copy of the GNU General Public License 23along with GCC; see the file COPYING. If not, write to 24the Free Software Foundation, 51 Franklin Street, Fifth Floor, 25Boston, MA 02110-1301, USA. 26 27*/ 28 29/* Define a symbol indicating that we are using svr4.h. */ 30#define USING_SVR4_H 31 32/* Use DWARF 2 debugging info by default. */ 33 34#undef PREFERRED_DEBUGGING_TYPE 35#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG 36 37#define DWARF2_DEBUGGING_INFO 1 38 39/* Cpp, assembler, linker, library, and startfile spec's. */ 40 41/* This defines which switch letters take arguments. On svr4, most of 42 the normal cases (defined in gcc.c) apply, and we also have -h* and 43 -z* options (for the linker). Note however that there is no such 44 thing as a -T option for svr4. */ 45 46#define SWITCH_TAKES_ARG(CHAR) \ 47 ( (CHAR) == 'D' \ 48 || (CHAR) == 'U' \ 49 || (CHAR) == 'o' \ 50 || (CHAR) == 'e' \ 51 || (CHAR) == 'u' \ 52 || (CHAR) == 'I' \ 53 || (CHAR) == 'm' \ 54 || (CHAR) == 'L' \ 55 || (CHAR) == 'A' \ 56 || (CHAR) == 'h' \ 57 || (CHAR) == 'z') 58 59/* This defines which multi-letter switches take arguments. On svr4, 60 there are no such switches except those implemented by GCC itself. */ 61 62#define WORD_SWITCH_TAKES_ARG(STR) \ 63 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \ 64 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \ 65 && strcmp (STR, "Tbss")) 66 67/* Provide an ASM_SPEC appropriate for svr4. Here we try to support as 68 many of the specialized svr4 assembler options as seems reasonable, 69 given that there are certain options which we can't (or shouldn't) 70 support directly due to the fact that they conflict with other options 71 for other svr4 tools (e.g. ld) or with other options for GCC itself. 72 For example, we don't support the -o (output file) or -R (remove 73 input file) options because GCC already handles these things. We 74 also don't support the -m (run m4) option for the assembler because 75 that conflicts with the -m (produce load map) option of the svr4 76 linker. We do however allow passing arbitrary options to the svr4 77 assembler via the -Wa, option. 78 79 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,* 80 option. 81*/ 82 83#undef ASM_SPEC 84#ifdef USE_GAS 85#define ASM_SPEC \ 86 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}" 87#else 88#define ASM_SPEC \ 89 "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}" 90#endif 91 92#define AS_NEEDS_DASH_FOR_PIPED_INPUT 93 94/* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default 95 standard C library (unless we are building a shared library). */ 96 97#undef LIB_SPEC 98#define LIB_SPEC "%{!shared:%{!symbolic:-lc}}" 99 100/* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude 101 libgcc when -symbolic. */ 102 103#undef LIBGCC_SPEC 104#define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}" 105 106/* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own 107 magical crtend.o file (see crtstuff.c) which provides part of the 108 support for getting C++ file-scope static object constructed before 109 entering `main', followed by the normal svr3/svr4 "finalizer" file, 110 which is either `gcrtn.o' or `crtn.o'. */ 111 112#undef ENDFILE_SPEC 113#define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}" 114 115/* Provide a LINK_SPEC appropriate for svr4. Here we provide support 116 for the special GCC options -static, -shared, and -symbolic which 117 allow us to link things in one of these three modes by applying the 118 appropriate combinations of options at link-time. We also provide 119 support here for as many of the other svr4 linker options as seems 120 reasonable, given that some of them conflict with options for other 121 svr4 tools (e.g. the assembler). In particular, we do support the 122 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*, 123 -l*, -o*, -r, -s, -u*, and -L* options are directly supported 124 by gcc.c itself. We don't directly support the -m (generate load 125 map) option because that conflicts with the -m (run m4) option of 126 the svr4 assembler. We also don't directly support the svr4 linker's 127 -I* or -M* options because these conflict with existing GCC options. 128 We do however allow passing arbitrary options to the svr4 linker 129 via the -Wl, option. We don't support the svr4 linker's -a option 130 at all because it is totally useless and because it conflicts with 131 GCC's own -a option. 132 133 Note that gcc doesn't allow a space to follow -Y in a -YP,* option. 134 135 When the -G link option is used (-shared and -symbolic) a final link is 136 not being done. */ 137 138#undef LINK_SPEC 139#define LINK_SPEC "%{h*} %{v:-V} \ 140 %{b} \ 141 %{static:-dn -Bstatic} \ 142 %{shared:-G -dy -z text} \ 143 %{symbolic:-Bsymbolic -G -dy -z text} \ 144 %{G:-G} \ 145 %{YP,*} \ 146 %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \ 147 %{!p:-Y P,/lib:/usr/lib}} \ 148 %{Qy:} %{!Qn:-Qy}" 149 150/* Gcc automatically adds in one of the files /lib/values-Xc.o 151 or /lib/values-Xa.o, for each final link step (depending upon the other 152 gcc options selected, such as -ansi). These files each contain one 153 (initialized) copy of a special variable called `_lib_version'. Each 154 one of these files has `_lib_version' initialized to a different (enum) 155 value. The SVR4 library routines query the value of `_lib_version' 156 at run to decide how they should behave. Specifically, they decide 157 (based upon the value of `_lib_version') if they will act in a strictly 158 ANSI conforming manner or not. 159*/ 160 161#undef STARTFILE_SPEC 162#define STARTFILE_SPEC "%{!shared: \ 163 %{!symbolic: \ 164 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\ 165 %{pg:gcrti.o%s}%{!pg:crti.o%s} \ 166 %{ansi:values-Xc.o%s} \ 167 %{!ansi:values-Xa.o%s} \ 168 crtbegin.o%s" 169 170/* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6. */ 171 172#undef HAVE_BCOPY 173 174/* The numbers used to denote specific machine registers in the System V 175 Release 4 DWARF debugging information are quite likely to be totally 176 different from the numbers used in BSD stabs debugging information 177 for the same kind of target machine. Thus, we undefine the macro 178 DBX_REGISTER_NUMBER here as an extra inducement to get people to 179 provide proper machine-specific definitions of DBX_REGISTER_NUMBER 180 (which is also used to provide DWARF registers numbers in dwarfout.c) 181 in their tm.h files which include this file. */ 182 183#undef DBX_REGISTER_NUMBER 184 185/* Like block addresses, stabs line numbers are relative to the 186 current function. */ 187 188#define DBX_LINES_FUNCTION_RELATIVE 1 189 190/* Generate a blank trailing N_SO to mark the end of the .o file, since 191 we can't depend upon the linker to mark .o file boundaries with 192 embedded stabs. */ 193 194#define DBX_OUTPUT_NULL_N_SO_AT_MAIN_SOURCE_FILE_END 195 196/* Define the actual types of some ANSI-mandated types. (These 197 definitions should work for most SVR4 systems). */ 198 199#undef SIZE_TYPE 200#define SIZE_TYPE "unsigned int" 201 202#undef PTRDIFF_TYPE 203#define PTRDIFF_TYPE "int" 204 205#undef WCHAR_TYPE 206#define WCHAR_TYPE "long int" 207 208#undef WCHAR_TYPE_SIZE 209#define WCHAR_TYPE_SIZE BITS_PER_WORD 210 211/* This says how to output assembler code to declare an uninitialized 212 external linkage data item. There's a bug in the DYNIX/ptx linker 213 (PR 254649) when the alignment for such an object is specified, so 214 ignore the ALIGN parameter. */ 215 216#undef ASM_OUTPUT_ALIGNED_COMMON 217#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 218do { \ 219 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 220 assemble_name ((FILE), (NAME)); \ 221 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE)); \ 222} while (0) 223 224