cygwin.h revision 90075
1/* Operating system specific defines to be used when targeting GCC for 2 hosting on Windows32, using a Unix style C library and tools. 3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 4 Free Software Foundation, Inc. 5 6This file is part of GNU CC. 7 8GNU CC is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2, or (at your option) 11any later version. 12 13GNU CC is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with GNU CC; see the file COPYING. If not, write to 20the Free Software Foundation, 59 Temple Place - Suite 330, 21Boston, MA 02111-1307, USA. */ 22 23#define YES_UNDERSCORES 24 25#define DBX_DEBUGGING_INFO 26#define SDB_DEBUGGING_INFO 27#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG 28 29#define TARGET_EXECUTABLE_SUFFIX ".exe" 30 31#include <stdio.h> 32#include "i386/gas.h" 33#include "dbxcoff.h" 34 35/* Augment TARGET_SWITCHES with the cygwin/no-cygwin options. */ 36#define MASK_WIN32 0x40000000 /* Use -lming32 interface */ 37#define MASK_CYGWIN 0x20000000 /* Use -lcygwin interface */ 38#define MASK_WINDOWS 0x10000000 /* Use windows interface */ 39#define MASK_DLL 0x08000000 /* Use dll interface */ 40#define MASK_NOP_FUN_DLLIMPORT 0x20000 /* Ignore dllimport for functions */ 41 42#define TARGET_WIN32 (target_flags & MASK_WIN32) 43#define TARGET_CYGWIN (target_flags & MASK_CYGWIN) 44#define TARGET_WINDOWS (target_flags & MASK_WINDOWS) 45#define TARGET_DLL (target_flags & MASK_DLL) 46#define TARGET_NOP_FUN_DLLIMPORT (target_flags & MASK_NOP_FUN_DLLIMPORT) 47 48#undef SUBTARGET_SWITCHES 49#define SUBTARGET_SWITCHES \ 50{ "cygwin", MASK_CYGWIN, \ 51 N_("Use the Cygwin interface") }, \ 52{ "no-cygwin", MASK_WIN32, \ 53 N_("Use the Mingw32 interface") }, \ 54{ "windows", MASK_WINDOWS, N_("Create GUI application") }, \ 55{ "no-win32", -MASK_WIN32, N_("Don't set Windows defines") },\ 56{ "win32", 0, N_("Set Windows defines") }, \ 57{ "console", -MASK_WINDOWS, \ 58 N_("Create console application") }, \ 59{ "dll", MASK_DLL, N_("Generate code for a DLL") }, \ 60{ "nop-fun-dllimport", MASK_NOP_FUN_DLLIMPORT, \ 61 N_("Ignore dllimport for functions") }, \ 62{ "no-nop-fun-dllimport", -MASK_NOP_FUN_DLLIMPORT, "" }, \ 63{ "threads", 0, N_("Use Mingw-specific thread support") }, 64 65#undef CPP_PREDEFINES 66#define CPP_PREDEFINES "-D_X86_=1 -Asystem=winnt" 67 68#ifdef CROSS_COMPILE 69#define CYGWIN_INCLUDES "%{!nostdinc:-idirafter " CYGWIN_CROSS_DIR "/include}" 70#define W32API_INC "%{!nostdinc:-idirafter " CYGWIN_CROSS_DIR "/include/w32api}" 71#define W32API_LIB "-L" CYGWIN_CROSS_DIR "/lib/w32api/" 72#define CYGWIN_LIB CYGWIN_CROSS_DIR "/lib" 73#define MINGW_LIBS "-L" CYGWIN_CROSS_DIR "/lib/mingw" 74#define MINGW_INCLUDES "%{!nostdinc:-isystem " CYGWIN_CROSS_DIR "/include/mingw/g++-3 "\ 75 "-isystem " CYGWIN_CROSS_DIR "/include/mingw/g++ "\ 76 "-idirafter " CYGWIN_CROSS_DIR "/include/mingw}" 77#else 78#define CYGWIN_INCLUDES "%{!nostdinc:-isystem /usr/local/include "\ 79 "-idirafter " CYGWIN_CROSS_DIR "/include "\ 80 "-idirafter /usr/include}" 81#define W32API_INC "%{!nostdinc:"\ 82 "-idirafter " CYGWIN_CROSS_DIR "/include/w32api "\ 83 "-idirafter /usr/include/w32api}" 84#define W32API_LIB "-L" CYGWIN_CROSS_DIR "/lib/w32api/ -L/usr/lib/w32api/" 85#define CYGWIN_LIB "/usr/lib" 86#define MINGW_LIBS "-L/usr/local/lib/mingw -L/usr/lib/mingw" 87#define MINGW_INCLUDES "%{!nostdinc:-isystem /usr/include/mingw/g++-3 "\ 88 "-isystem /usr/include/mingw/g++ "\ 89 "-isystem /usr/local/include/mingw "\ 90 "-idirafter " CYGWIN_CROSS_DIR "/include/mingw "\ 91 "-idirafter /usr/include/mingw}" 92#endif 93 94/* Get tree.c to declare a target-specific specialization of 95 merge_decl_attributes. */ 96#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 97 98/* Support the __declspec keyword by turning them into attributes. 99 We currently only support: dllimport and dllexport. 100 Note that the current way we do this may result in a collision with 101 predefined attributes later on. This can be solved by using one attribute, 102 say __declspec__, and passing args to it. The problem with that approach 103 is that args are not accumulated: each new appearance would clobber any 104 existing args. */ 105 106#undef CPP_SPEC 107#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} \ 108 -D__stdcall=__attribute__((__stdcall__)) \ 109 -D__cdecl=__attribute__((__cdecl__)) \ 110 %{!ansi:-D_stdcall=__attribute__((__stdcall__)) \ 111 -D_cdecl=__attribute__((__cdecl__))} \ 112 -D__declspec(x)=__attribute__((x)) \ 113 -D__i386__ -D__i386 \ 114 %{mno-win32:%{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}} \ 115 %{mno-cygwin:-D__MSVCRT__ -D__MINGW32__ %{mthreads:-D_MT} "\ 116 MINGW_INCLUDES "} \ 117 %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ %{!ansi:-Dunix} -D__unix__ -D__unix "\ 118 CYGWIN_INCLUDES "}\ 119 %{mwin32|mno-cygwin:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ %{!ansi:-DWINNT}}\ 120 %{!mno-win32:" W32API_INC "}\ 121" 122 123#undef STARTFILE_SPEC 124#define STARTFILE_SPEC "\ 125 %{shared|mdll: %{mno-cygwin:" MINGW_LIBS " dllcrt2%O%s}}\ 126 %{!shared: %{!mdll: %{!mno-cygwin:crt0%O%s} %{mno-cygwin:" MINGW_LIBS " crt2%O%s}\ 127 %{pg:gcrt0%O%s}}}\ 128" 129 130/* Normally, -lgcc is not needed since everything in it is in the DLL, but we 131 want to allow things to be added to it when installing new versions of 132 GCC without making a new CYGWIN.DLL, so we leave it. Profiling is handled 133 by calling the init function from the prologue. */ 134 135#undef LIBGCC_SPEC 136#define LIBGCC_SPEC "%{mno-cygwin: %{mthreads:-lmingwthrd} -lmingw32} -lgcc %{mno-cygwin:-lmoldname -lmsvcrt}" 137 138/* This macro defines names of additional specifications to put in the specs 139 that can be used in various specifications like CC1_SPEC. Its definition 140 is an initializer with a subgrouping for each command option. 141 142 Each subgrouping contains a string constant, that defines the 143 specification name, and a string constant that used by the GNU CC driver 144 program. 145 146 Do not define this macro if it does not need to do anything. */ 147 148#undef SUBTARGET_EXTRA_SPECS 149#define SUBTARGET_EXTRA_SPECS \ 150 { "mingw_include_path", DEFAULT_TARGET_MACHINE } 151 152/* We have to dynamic link to get to the system DLLs. All of libc, libm and 153 the Unix stuff is in cygwin.dll. The import library is called 154 'libcygwin.a'. For Windows applications, include more libraries, but 155 always include kernel32. We'd like to specific subsystem windows to 156 ld, but that doesn't work just yet. */ 157 158#undef LIB_SPEC 159#define LIB_SPEC "\ 160 %{pg:-lgmon} \ 161 %{!mno-cygwin:-lcygwin} \ 162 %{mno-cygwin:%{mthreads:-lmingwthrd} -lmingw32} \ 163 %{mwindows:-lgdi32 -lcomdlg32} \ 164 -luser32 -lkernel32 -ladvapi32 -lshell32" 165 166#define LINK_SPEC W32API_LIB "\ 167 %{mwindows:--subsystem windows} \ 168 %{mconsole:--subsystem console} \ 169 %{shared: %{mdll: %eshared and mdll are not compatible}} \ 170 %{shared: --shared} %{mdll:--dll} \ 171 %{static:-Bstatic} %{!static:-Bdynamic} \ 172 %{shared|mdll: -e \ 173 %{mno-cygwin:_DllMainCRTStartup@12} \ 174 %{!mno-cygwin:__cygwin_dll_entry@12}}\ 175 --dll-search-prefix=cyg" 176 177#undef MATH_LIBRARY 178#define MATH_LIBRARY "" 179 180#define SIZE_TYPE "unsigned int" 181#define PTRDIFF_TYPE "int" 182#define WCHAR_UNSIGNED 1 183#define WCHAR_TYPE_SIZE 16 184#define WCHAR_TYPE "short unsigned int" 185 186 187/* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */ 188#define HANDLE_PRAGMA_PACK_PUSH_POP 1 189 190union tree_node; 191#define TREE union tree_node * 192 193/* Used to implement dllexport overriding dllimport semantics. It's also used 194 to handle vtables - the first pass won't do anything because 195 DECL_CONTEXT (DECL) will be 0 so i386_pe_dll{ex,im}port_p will return 0. 196 It's also used to handle dllimport override semantics. */ 197#if 0 198#define REDO_SECTION_INFO_P(DECL) \ 199 ((DECL_ATTRIBUTES (DECL) != NULL_TREE) \ 200 || (TREE_CODE (DECL) == VAR_DECL && DECL_VIRTUAL_P (DECL))) 201#else 202#define REDO_SECTION_INFO_P(DECL) 1 203#endif 204 205 206#undef EXTRA_SECTIONS 207#define EXTRA_SECTIONS in_drectve 208 209#undef EXTRA_SECTION_FUNCTIONS 210#define EXTRA_SECTION_FUNCTIONS \ 211 DRECTVE_SECTION_FUNCTION \ 212 SWITCH_TO_SECTION_FUNCTION 213 214#define DRECTVE_SECTION_FUNCTION \ 215void \ 216drectve_section () \ 217{ \ 218 if (in_section != in_drectve) \ 219 { \ 220 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \ 221 in_section = in_drectve; \ 222 } \ 223} 224void drectve_section PARAMS ((void)); 225 226/* Switch to SECTION (an `enum in_section'). 227 228 ??? This facility should be provided by GCC proper. 229 The problem is that we want to temporarily switch sections in 230 ASM_DECLARE_OBJECT_NAME and then switch back to the original section 231 afterwards. */ 232#define SWITCH_TO_SECTION_FUNCTION \ 233void switch_to_section PARAMS ((enum in_section, tree)); \ 234void \ 235switch_to_section (section, decl) \ 236 enum in_section section; \ 237 tree decl; \ 238{ \ 239 switch (section) \ 240 { \ 241 case in_text: text_section (); break; \ 242 case in_data: data_section (); break; \ 243 case in_named: named_section (decl, NULL, 0); break; \ 244 case in_drectve: drectve_section (); break; \ 245 default: abort (); break; \ 246 } \ 247} 248 249/* Don't allow flag_pic to propagate since gas may produce invalid code 250 otherwise. */ 251 252#undef SUBTARGET_OVERRIDE_OPTIONS 253#define SUBTARGET_OVERRIDE_OPTIONS \ 254do { \ 255 if (flag_pic) \ 256 { \ 257 warning ("-f%s ignored for target (all code is position independent)",\ 258 (flag_pic > 1) ? "PIC" : "pic"); \ 259 flag_pic = 0; \ 260 } \ 261} while (0) \ 262 263/* Define this macro if references to a symbol must be treated 264 differently depending on something about the variable or 265 function named by the symbol (such as what section it is in). 266 267 On i386 running Windows NT, modify the assembler name with a suffix 268 consisting of an atsign (@) followed by string of digits that represents 269 the number of bytes of arguments passed to the function, if it has the 270 attribute STDCALL. 271 272 In addition, we must mark dll symbols specially. Definitions of 273 dllexport'd objects install some info in the .drectve section. 274 References to dllimport'd objects are fetched indirectly via 275 _imp__. If both are declared, dllexport overrides. This is also 276 needed to implement one-only vtables: they go into their own 277 section and we need to set DECL_SECTION_NAME so we do that here. 278 Note that we can be called twice on the same decl. */ 279 280extern void i386_pe_encode_section_info PARAMS ((TREE)); 281 282#ifdef ENCODE_SECTION_INFO 283#undef ENCODE_SECTION_INFO 284#endif 285#define ENCODE_SECTION_INFO(DECL) i386_pe_encode_section_info (DECL) 286 287/* Utility used only in this file. */ 288#define I386_PE_STRIP_ENCODING(SYM_NAME) \ 289 ((SYM_NAME) + ((SYM_NAME)[0] == '@' \ 290 ? ((SYM_NAME)[3] == '*' ? 4 : 3) : 0) \ 291 + ((SYM_NAME)[0] == '*' ? 1 : 0)) 292 293/* This macro gets just the user-specified name 294 out of the string in a SYMBOL_REF. Discard 295 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */ 296#undef STRIP_NAME_ENCODING 297#define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \ 298do { \ 299 const char *_p; \ 300 const char *_name = I386_PE_STRIP_ENCODING (SYMBOL_NAME); \ 301 for (_p = _name; *_p && *_p != '@'; ++_p) \ 302 ; \ 303 if (*_p == '@') \ 304 { \ 305 int _len = _p - _name; \ 306 char *_new_name = (char *) alloca (_len + 1); \ 307 strncpy (_new_name, _name, _len); \ 308 _new_name[_len] = '\0'; \ 309 (VAR) = _new_name; \ 310 } \ 311 else \ 312 (VAR) = _name; \ 313} while (0) 314 315 316/* Output a reference to a label. */ 317#undef ASM_OUTPUT_LABELREF 318#define ASM_OUTPUT_LABELREF(STREAM, NAME) \ 319 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \ 320 I386_PE_STRIP_ENCODING (NAME)) \ 321 322/* Output a common block. */ 323#undef ASM_OUTPUT_COMMON 324#define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \ 325do { \ 326 if (i386_pe_dllexport_name_p (NAME)) \ 327 i386_pe_record_exported_symbol (NAME, 1); \ 328 if (! i386_pe_dllimport_name_p (NAME)) \ 329 { \ 330 fprintf ((STREAM), "\t.comm\t"); \ 331 assemble_name ((STREAM), (NAME)); \ 332 fprintf ((STREAM), ", %d\t%s %d\n", \ 333 (ROUNDED), ASM_COMMENT_START, (SIZE)); \ 334 } \ 335} while (0) 336 337/* Output the label for an initialized variable. */ 338#undef ASM_DECLARE_OBJECT_NAME 339#define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ 340do { \ 341 if (i386_pe_dllexport_name_p (NAME)) \ 342 i386_pe_record_exported_symbol (NAME, 1); \ 343 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \ 344} while (0) 345 346 347/* Emit code to check the stack when allocating more that 4000 348 bytes in one go. */ 349 350#define CHECK_STACK_LIMIT 4000 351 352/* By default, target has a 80387, uses IEEE compatible arithmetic, 353 and returns float values in the 387 and needs stack probes */ 354#undef TARGET_SUBTARGET_DEFAULT 355 356#define TARGET_SUBTARGET_DEFAULT \ 357 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE) 358 359/* This is how to output an assembler line 360 that says to advance the location counter 361 to a multiple of 2**LOG bytes. */ 362 363#undef ASM_OUTPUT_ALIGN 364#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 365 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG)) 366 367/* Define this macro if in some cases global symbols from one translation 368 unit may not be bound to undefined symbols in another translation unit 369 without user intervention. For instance, under Microsoft Windows 370 symbols must be explicitly imported from shared libraries (DLLs). */ 371#define MULTIPLE_SYMBOL_SPACES 372 373extern void i386_pe_unique_section PARAMS ((TREE, int)); 374#define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC) 375 376#define SUPPORTS_ONE_ONLY 1 377 378/* Switch into a generic section. */ 379#define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section 380 381/* Select attributes for named sections. */ 382#define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags 383 384/* Write the extra assembler code needed to declare a function 385 properly. If we are generating SDB debugging information, this 386 will happen automatically, so we only need to handle other cases. */ 387#undef ASM_DECLARE_FUNCTION_NAME 388#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 389 do \ 390 { \ 391 if (i386_pe_dllexport_name_p (NAME)) \ 392 i386_pe_record_exported_symbol (NAME, 0); \ 393 if (write_symbols != SDB_DEBUG) \ 394 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \ 395 ASM_OUTPUT_LABEL (FILE, NAME); \ 396 } \ 397 while (0) 398 399/* Add an external function to the list of functions to be declared at 400 the end of the file. */ 401#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \ 402 do \ 403 { \ 404 if (TREE_CODE (DECL) == FUNCTION_DECL) \ 405 i386_pe_record_external_function (NAME); \ 406 } \ 407 while (0) 408 409/* Declare the type properly for any external libcall. */ 410#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 411 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1) 412 413/* This says out to put a global symbol in the BSS section. */ 414#undef ASM_OUTPUT_ALIGNED_BSS 415#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 416 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN)) 417 418/* Output function declarations at the end of the file. */ 419#undef ASM_FILE_END 420#define ASM_FILE_END(FILE) \ 421 i386_pe_asm_file_end (FILE) 422 423#undef ASM_COMMENT_START 424#define ASM_COMMENT_START " #" 425 426/* Don't assume anything about the header files. */ 427#define NO_IMPLICIT_EXTERN_C 428 429#define SUBTARGET_PROLOGUE \ 430 if (current_function_profile \ 431 && MAIN_NAME_P (DECL_NAME (current_function_decl))) \ 432 { \ 433 emit_call_insn (gen_rtx (CALL, VOIDmode, \ 434 gen_rtx_MEM (FUNCTION_MODE, \ 435 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \ 436 const0_rtx)); \ 437 } 438 439/* External function declarations. */ 440 441extern void i386_pe_record_external_function PARAMS ((const char *)); 442extern void i386_pe_declare_function_type PARAMS ((FILE *, const char *, int)); 443extern void i386_pe_record_exported_symbol PARAMS ((const char *, int)); 444extern void i386_pe_asm_file_end PARAMS ((FILE *)); 445extern int i386_pe_dllexport_name_p PARAMS ((const char *)); 446extern int i386_pe_dllimport_name_p PARAMS ((const char *)); 447 448/* For Win32 ABI compatibility */ 449#undef DEFAULT_PCC_STRUCT_RETURN 450#define DEFAULT_PCC_STRUCT_RETURN 0 451 452/* No data type wants to be aligned rounder than this. */ 453#undef BIGGEST_ALIGNMENT 454#define BIGGEST_ALIGNMENT 128 455 456/* Native complier aligns internal doubles in structures on dword boundaries. */ 457#undef BIGGEST_FIELD_ALIGNMENT 458#define BIGGEST_FIELD_ALIGNMENT 64 459 460/* A bitfield declared as `int' forces `int' alignment for the struct. */ 461#undef PCC_BITFIELD_TYPE_MATTERS 462#define PCC_BITFIELD_TYPE_MATTERS 1 463#define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec) 464 465 466/* Enable alias attribute support. */ 467#ifndef SET_ASM_OP 468#define SET_ASM_OP "\t.set\t" 469#endif 470 471/* Override GCC's relative pathname lookup (ie., relocatability) unless 472 otherwise told by other subtargets. */ 473#ifndef WIN32_NO_ABSOLUTE_INST_DIRS 474#undef MD_STARTFILE_PREFIX 475#define MD_STARTFILE_PREFIX "/usr/lib/" 476 477#undef STANDARD_STARTFILE_PREFIX 478#define STANDARD_STARTFILE_PREFIX "/usr/lib/mingw/" 479 480#ifndef CROSS_COMPILE 481#undef LOCAL_INCLUDE_DIR 482#undef TOOL_INCLUDE_DIR 483#undef SYSTEM_INCLUDE_DIR 484#undef STANDARD_INCLUDE_DIR 485#define STANDARD_INCLUDE_DIR 0 486#endif /* not CROSS_COMPILE */ 487#endif /* not WIN32_NO_ABSOLUTE_INST_DIRS */ 488 489#undef TREE 490 491#ifndef BUFSIZ 492# undef FILE 493#endif 494