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.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
23 #define DBX_DEBUGGING_INFO
24 #define SDB_DEBUGGING_INFO
25 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
27 #define TARGET_VERSION fprintf (stderr, " (x86 Cygwin)");
28 #define TARGET_EXECUTABLE_SUFFIX ".exe"
31 #include "i386/i386.h"
32 #include "i386/unix.h"
37 /* Masks for subtarget switches used by other files. */
38 #define MASK_NOP_FUN_DLLIMPORT 0x08000000 /* Ignore dllimport for functions */
40 /* Used in winnt.c. */
41 #define TARGET_NOP_FUN_DLLIMPORT (target_flags & MASK_NOP_FUN_DLLIMPORT)
43 #undef SUBTARGET_SWITCHES
44 #define SUBTARGET_SWITCHES \
45 { "cygwin", 0, N_("Use the Cygwin interface") }, \
46 { "no-cygwin", 0, N_("Use the Mingw32 interface") }, \
47 { "windows", 0, N_("Create GUI application") }, \
48 { "no-win32", 0, N_("Don't set Windows defines") }, \
49 { "win32", 0, N_("Set Windows defines") }, \
50 { "console", 0, N_("Create console application") },\
51 { "dll", 0, N_("Generate code for a DLL") }, \
52 { "nop-fun-dllimport", MASK_NOP_FUN_DLLIMPORT, \
53 N_("Ignore dllimport for functions") }, \
54 { "no-nop-fun-dllimport", -MASK_NOP_FUN_DLLIMPORT, "" }, \
55 { "threads", 0, N_("Use Mingw-specific thread support") },
58 #define CPP_PREDEFINES "-D_X86_=1 -Asystem=winnt"
61 #define CYGWIN_INCLUDES "%{!nostdinc:-idirafter " CYGWIN_CROSS_DIR "/include}"
62 #define W32API_INC "%{!nostdinc:-idirafter " CYGWIN_CROSS_DIR "/include/w32api}"
63 #define W32API_LIB "-L" CYGWIN_CROSS_DIR "/lib/w32api/"
64 #define CYGWIN_LIB CYGWIN_CROSS_DIR "/lib"
65 #define MINGW_LIBS "-L" CYGWIN_CROSS_DIR "/lib/mingw"
66 #define MINGW_INCLUDES "%{!nostdinc:-isystem " CYGWIN_CROSS_DIR "/include/mingw/g++-3 "\
67 "-isystem " CYGWIN_CROSS_DIR "/include/mingw/g++ "\
68 "-idirafter " CYGWIN_CROSS_DIR "/include/mingw}"
70 #define CYGWIN_INCLUDES "%{!nostdinc:-isystem /usr/local/include "\
71 "-idirafter " CYGWIN_CROSS_DIR "/include "\
72 "-idirafter /usr/include}"
73 #define W32API_INC "%{!nostdinc:"\
74 "-idirafter " CYGWIN_CROSS_DIR "/include/w32api "\
75 "-idirafter /usr/include/w32api}"
76 #define W32API_LIB "-L" CYGWIN_CROSS_DIR "/lib/w32api/ -L/usr/lib/w32api/"
77 #define CYGWIN_LIB "/usr/lib"
78 #define MINGW_LIBS "-L/usr/local/lib/mingw -L/usr/lib/mingw"
79 #define MINGW_INCLUDES "%{!nostdinc:-isystem /usr/include/mingw/g++-3 "\
80 "-isystem /usr/include/mingw/g++ "\
81 "-isystem /usr/local/include/mingw "\
82 "-idirafter " CYGWIN_CROSS_DIR "/include/mingw "\
83 "-idirafter /usr/include/mingw}"
86 /* Get tree.c to declare a target-specific specialization of
87 merge_decl_attributes. */
88 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES
90 /* Support the __declspec keyword by turning them into attributes.
91 We currently only support: dllimport and dllexport.
92 Note that the current way we do this may result in a collision with
93 predefined attributes later on. This can be solved by using one attribute,
94 say __declspec__, and passing args to it. The problem with that approach
95 is that args are not accumulated: each new appearance would clobber any
99 #define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE} \
100 -D__stdcall=__attribute__((__stdcall__)) \
101 -D__cdecl=__attribute__((__cdecl__)) \
102 %{!ansi:-D_stdcall=__attribute__((__stdcall__)) \
103 -D_cdecl=__attribute__((__cdecl__))} \
104 -D__declspec(x)=__attribute__((x)) \
105 -D__i386__ -D__i386 \
106 %{mno-win32:%{mno-cygwin: %emno-cygwin and mno-win32 are not compatible}} \
107 %{mno-cygwin:-D__MSVCRT__ -D__MINGW32__ %{mthreads:-D_MT} "\
109 %{!mno-cygwin:-D__CYGWIN32__ -D__CYGWIN__ %{!ansi:-Dunix} -D__unix__ -D__unix "\
111 %{mwin32|mno-cygwin:-DWIN32 -D_WIN32 -D__WIN32 -D__WIN32__ %{!ansi:-DWINNT}}\
112 %{!mno-win32:" W32API_INC "}\
115 #undef STARTFILE_SPEC
116 #define STARTFILE_SPEC "\
117 %{shared|mdll: %{mno-cygwin:" MINGW_LIBS " dllcrt2%O%s}}\
118 %{!shared: %{!mdll: %{!mno-cygwin:crt0%O%s} %{mno-cygwin:" MINGW_LIBS " crt2%O%s}\
122 /* Normally, -lgcc is not needed since everything in it is in the DLL, but we
123 want to allow things to be added to it when installing new versions of
124 GCC without making a new CYGWIN.DLL, so we leave it. Profiling is handled
125 by calling the init function from the prologue. */
128 #define LIBGCC_SPEC "%{mno-cygwin: %{mthreads:-lmingwthrd} -lmingw32} -lgcc %{mno-cygwin:-lmoldname -lmsvcrt}"
130 /* This macro defines names of additional specifications to put in the specs
131 that can be used in various specifications like CC1_SPEC. Its definition
132 is an initializer with a subgrouping for each command option.
134 Each subgrouping contains a string constant, that defines the
135 specification name, and a string constant that used by the GNU CC driver
138 Do not define this macro if it does not need to do anything. */
140 #undef SUBTARGET_EXTRA_SPECS
141 #define SUBTARGET_EXTRA_SPECS \
142 { "mingw_include_path", DEFAULT_TARGET_MACHINE }
144 /* We have to dynamic link to get to the system DLLs. All of libc, libm and
145 the Unix stuff is in cygwin.dll. The import library is called
146 'libcygwin.a'. For Windows applications, include more libraries, but
147 always include kernel32. We'd like to specific subsystem windows to
148 ld, but that doesn't work just yet. */
153 %{!mno-cygwin:-lcygwin} \
154 %{mno-cygwin:%{mthreads:-lmingwthrd} -lmingw32} \
155 %{mwindows:-lgdi32 -lcomdlg32} \
156 -luser32 -lkernel32 -ladvapi32 -lshell32"
158 #define LINK_SPEC W32API_LIB "\
159 %{mwindows:--subsystem windows} \
160 %{mconsole:--subsystem console} \
161 %{shared: %{mdll: %eshared and mdll are not compatible}} \
162 %{shared: --shared} %{mdll:--dll} \
163 %{static:-Bstatic} %{!static:-Bdynamic} \
165 %{mno-cygwin:_DllMainCRTStartup@12} \
166 %{!mno-cygwin:__cygwin_dll_entry@12}}\
167 --dll-search-prefix=cyg"
170 #define MATH_LIBRARY ""
172 #define SIZE_TYPE "unsigned int"
173 #define PTRDIFF_TYPE "int"
174 #define WCHAR_UNSIGNED 1
175 #define WCHAR_TYPE_SIZE 16
176 #define WCHAR_TYPE "short unsigned int"
179 /* Enable parsing of #pragma pack(push,<n>) and #pragma pack(pop). */
180 #define HANDLE_PRAGMA_PACK_PUSH_POP 1
183 #define TREE union tree_node *
185 #undef EXTRA_SECTIONS
186 #define EXTRA_SECTIONS in_drectve
188 #undef EXTRA_SECTION_FUNCTIONS
189 #define EXTRA_SECTION_FUNCTIONS \
190 DRECTVE_SECTION_FUNCTION \
191 SWITCH_TO_SECTION_FUNCTION
193 #define DRECTVE_SECTION_FUNCTION \
197 if (in_section != in_drectve) \
199 fprintf (asm_out_file, "%s\n", "\t.section .drectve\n"); \
200 in_section = in_drectve; \
203 void drectve_section PARAMS ((void));
205 /* Switch to SECTION (an `enum in_section').
207 ??? This facility should be provided by GCC proper.
208 The problem is that we want to temporarily switch sections in
209 ASM_DECLARE_OBJECT_NAME and then switch back to the original section
211 #define SWITCH_TO_SECTION_FUNCTION \
212 void switch_to_section PARAMS ((enum in_section, tree)); \
214 switch_to_section (section, decl) \
215 enum in_section section; \
220 case in_text: text_section (); break; \
221 case in_data: data_section (); break; \
222 case in_named: named_section (decl, NULL, 0); break; \
223 case in_drectve: drectve_section (); break; \
224 default: abort (); break; \
228 /* Don't allow flag_pic to propagate since gas may produce invalid code
231 #undef SUBTARGET_OVERRIDE_OPTIONS
232 #define SUBTARGET_OVERRIDE_OPTIONS \
236 warning ("-f%s ignored for target (all code is position independent)",\
237 (flag_pic > 1) ? "PIC" : "pic"); \
242 /* Define this macro if references to a symbol must be treated
243 differently depending on something about the variable or
244 function named by the symbol (such as what section it is in).
246 On i386 running Windows NT, modify the assembler name with a suffix
247 consisting of an atsign (@) followed by string of digits that represents
248 the number of bytes of arguments passed to the function, if it has the
251 In addition, we must mark dll symbols specially. Definitions of
252 dllexport'd objects install some info in the .drectve section.
253 References to dllimport'd objects are fetched indirectly via
254 _imp__. If both are declared, dllexport overrides. This is also
255 needed to implement one-only vtables: they go into their own
256 section and we need to set DECL_SECTION_NAME so we do that here.
257 Note that we can be called twice on the same decl. */
259 extern void i386_pe_encode_section_info PARAMS ((TREE, int));
261 #undef ENCODE_SECTION_INFO
262 #define ENCODE_SECTION_INFO(DECL, FIRST) \
263 i386_pe_encode_section_info (DECL, FIRST)
265 /* Utility used only in this file. */
266 #define I386_PE_STRIP_ENCODING(SYM_NAME) \
267 ((SYM_NAME) + ((SYM_NAME)[0] == '@' \
268 ? ((SYM_NAME)[3] == '*' ? 4 : 3) : 0) \
269 + ((SYM_NAME)[0] == '*' ? 1 : 0))
271 /* This macro gets just the user-specified name
272 out of the string in a SYMBOL_REF. Discard
273 trailing @[NUM] encoded by ENCODE_SECTION_INFO. */
274 #undef STRIP_NAME_ENCODING
275 #define STRIP_NAME_ENCODING(VAR,SYMBOL_NAME) \
278 const char *_name = I386_PE_STRIP_ENCODING (SYMBOL_NAME); \
279 for (_p = _name; *_p && *_p != '@'; ++_p) \
283 int _len = _p - _name; \
284 char *_new_name = (char *) alloca (_len + 1); \
285 strncpy (_new_name, _name, _len); \
286 _new_name[_len] = '\0'; \
294 /* Output a reference to a label. */
295 #undef ASM_OUTPUT_LABELREF
296 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
297 fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \
298 I386_PE_STRIP_ENCODING (NAME)) \
300 /* Output a common block. */
301 #undef ASM_OUTPUT_COMMON
302 #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
304 if (i386_pe_dllexport_name_p (NAME)) \
305 i386_pe_record_exported_symbol (NAME, 1); \
306 if (! i386_pe_dllimport_name_p (NAME)) \
308 fprintf ((STREAM), "\t.comm\t"); \
309 assemble_name ((STREAM), (NAME)); \
310 fprintf ((STREAM), ", %d\t%s %d\n", \
311 (ROUNDED), ASM_COMMENT_START, (SIZE)); \
315 /* Output the label for an initialized variable. */
316 #undef ASM_DECLARE_OBJECT_NAME
317 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
319 if (i386_pe_dllexport_name_p (NAME)) \
320 i386_pe_record_exported_symbol (NAME, 1); \
321 ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
325 /* Emit code to check the stack when allocating more that 4000
328 #define CHECK_STACK_LIMIT 4000
330 /* By default, target has a 80387, uses IEEE compatible arithmetic,
331 and returns float values in the 387 and needs stack probes */
332 #undef TARGET_SUBTARGET_DEFAULT
334 #define TARGET_SUBTARGET_DEFAULT \
335 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_STACK_PROBE)
337 /* This is how to output an assembler line
338 that says to advance the location counter
339 to a multiple of 2**LOG bytes. */
341 #undef ASM_OUTPUT_ALIGN
342 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
343 if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
345 /* Define this macro if in some cases global symbols from one translation
346 unit may not be bound to undefined symbols in another translation unit
347 without user intervention. For instance, under Microsoft Windows
348 symbols must be explicitly imported from shared libraries (DLLs). */
349 #define MULTIPLE_SYMBOL_SPACES
351 extern void i386_pe_unique_section PARAMS ((TREE, int));
352 #define UNIQUE_SECTION(DECL,RELOC) i386_pe_unique_section (DECL, RELOC)
354 #define SUPPORTS_ONE_ONLY 1
356 /* Switch into a generic section. */
357 #define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section
359 /* Select attributes for named sections. */
360 #define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags
362 /* Write the extra assembler code needed to declare a function
363 properly. If we are generating SDB debugging information, this
364 will happen automatically, so we only need to handle other cases. */
365 #undef ASM_DECLARE_FUNCTION_NAME
366 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
369 if (i386_pe_dllexport_name_p (NAME)) \
370 i386_pe_record_exported_symbol (NAME, 0); \
371 if (write_symbols != SDB_DEBUG) \
372 i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
373 ASM_OUTPUT_LABEL (FILE, NAME); \
377 /* Add an external function to the list of functions to be declared at
378 the end of the file. */
379 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
382 if (TREE_CODE (DECL) == FUNCTION_DECL) \
383 i386_pe_record_external_function (NAME); \
387 /* Declare the type properly for any external libcall. */
388 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
389 i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
391 /* This says out to put a global symbol in the BSS section. */
392 #undef ASM_OUTPUT_ALIGNED_BSS
393 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
394 asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
396 /* Output function declarations at the end of the file. */
398 #define ASM_FILE_END(FILE) \
399 i386_pe_asm_file_end (FILE)
401 #undef ASM_COMMENT_START
402 #define ASM_COMMENT_START " #"
404 /* DWARF2 Unwinding doesn't work with exception handling yet. To make
405 it work, we need to build a libgcc_s.dll, and dcrt0.o should be
406 changed to call __register_frame_info/__deregister_frame_info. */
407 #define DWARF2_UNWIND_INFO 0
409 /* Don't assume anything about the header files. */
410 #define NO_IMPLICIT_EXTERN_C
412 #define SUBTARGET_PROLOGUE \
413 if (current_function_profile \
414 && MAIN_NAME_P (DECL_NAME (current_function_decl))) \
416 emit_call_insn (gen_rtx (CALL, VOIDmode, \
417 gen_rtx_MEM (FUNCTION_MODE, \
418 gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
422 /* External function declarations. */
424 extern void i386_pe_record_external_function PARAMS ((const char *));
425 extern void i386_pe_declare_function_type PARAMS ((FILE *, const char *, int));
426 extern void i386_pe_record_exported_symbol PARAMS ((const char *, int));
427 extern void i386_pe_asm_file_end PARAMS ((FILE *));
428 extern int i386_pe_dllexport_name_p PARAMS ((const char *));
429 extern int i386_pe_dllimport_name_p PARAMS ((const char *));
431 /* For Win32 ABI compatibility */
432 #undef DEFAULT_PCC_STRUCT_RETURN
433 #define DEFAULT_PCC_STRUCT_RETURN 0
435 /* No data type wants to be aligned rounder than this. */
436 #undef BIGGEST_ALIGNMENT
437 #define BIGGEST_ALIGNMENT 128
439 /* Native complier aligns internal doubles in structures on dword boundaries. */
440 #undef BIGGEST_FIELD_ALIGNMENT
441 #define BIGGEST_FIELD_ALIGNMENT 64
443 /* A bitfield declared as `int' forces `int' alignment for the struct. */
444 #undef PCC_BITFIELD_TYPE_MATTERS
445 #define PCC_BITFIELD_TYPE_MATTERS 1
446 #define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
449 /* Enable alias attribute support. */
451 #define SET_ASM_OP "\t.set\t"
454 /* Override GCC's relative pathname lookup (ie., relocatability) unless
455 otherwise told by other subtargets. */
456 #ifndef WIN32_NO_ABSOLUTE_INST_DIRS
457 #undef MD_STARTFILE_PREFIX
458 #define MD_STARTFILE_PREFIX "/usr/lib/"
460 #undef STANDARD_STARTFILE_PREFIX
461 #define STANDARD_STARTFILE_PREFIX "/usr/lib/mingw/"
463 #ifndef CROSS_COMPILE
464 #undef LOCAL_INCLUDE_DIR
465 #undef TOOL_INCLUDE_DIR
466 #undef SYSTEM_INCLUDE_DIR
467 #undef STANDARD_INCLUDE_DIR
468 #define STANDARD_INCLUDE_DIR 0
469 #endif /* not CROSS_COMPILE */
470 #endif /* not WIN32_NO_ABSOLUTE_INST_DIRS */