gcc/config/i386/mingw32.h

   1 /* Operating system specific defines to be used when targeting GCC for
   2    hosting on Windows32, using GNU tools and the Windows32 API Library.
   3    Copyright (C) 1997-2021 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #undef DEFAULT_ABI
  22 #define DEFAULT_ABI MS_ABI
  23
  24 /* By default, target has a 80387, uses IEEE compatible arithmetic,
  25    returns float values in the 387 and needs stack probes.
  26    We also align doubles to 64-bits for MSVC default compatibility.
  27    Additionally we enable MS_BITFIELD_LAYOUT by default.  */
  28
  29 #undef TARGET_SUBTARGET_DEFAULT
  30 #define TARGET_SUBTARGET_DEFAULT \
  31         (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS \
  32          | MASK_STACK_PROBE | MASK_ALIGN_DOUBLE \
  33          | MASK_MS_BITFIELD_LAYOUT)
  34
  35 /* See i386/crtdll.h for an alternative definition. _INTEGRAL_MAX_BITS
  36    is for compatibility with native compiler.  */
  37 #define EXTRA_OS_CPP_BUILTINS()                                 \
  38   do                                                            \
  39     {                                                           \
  40       builtin_define ("__MSVCRT__");                            \
  41       builtin_define ("__MINGW32__");                           \
  42       builtin_define ("_WIN32");                                \
  43       builtin_define_std ("WIN32");                             \
  44       builtin_define_std ("WINNT");                             \
  45       builtin_define_with_int_value ("_INTEGRAL_MAX_BITS",      \
  46                                      TYPE_PRECISION (intmax_type_node));\
  47       if (TARGET_64BIT && ix86_abi == MS_ABI)                   \
  48         {                                                       \
  49           builtin_define ("__MINGW64__");                       \
  50           builtin_define_std ("WIN64");                         \
  51           builtin_define ("_WIN64");                            \
  52         }                                                       \
  53     }                                                           \
  54   while (0)
  55
  56 #ifndef TARGET_USE_PTHREAD_BY_DEFAULT
  57 #define SPEC_PTHREAD1 "pthread"
  58 #define SPEC_PTHREAD2 "!no-pthread"
  59 #else
  60 #define SPEC_PTHREAD1 "!no-pthread"
  61 #define SPEC_PTHREAD2 "pthread"
  62 #endif
  63
  64 #undef SUB_LINK_ENTRY32
  65 #undef SUB_LINK_ENTRY64
  66 #define SUB_LINK_ENTRY32 "-e _DllMainCRTStartup@12"
  67 #if defined(USE_MINGW64_LEADING_UNDERSCORES)
  68 #define SUB_LINK_ENTRY64 "-e _DllMainCRTStartup"
  69 #else
  70 #define SUB_LINK_ENTRY64 "-e DllMainCRTStartup"
  71 #endif
  72
  73 #undef SUB_LINK_ENTRY
  74 #if TARGET_64BIT_DEFAULT
  75 #define SUB_LINK_ENTRY SUB_LINK_ENTRY64
  76 #else
  77 #define SUB_LINK_ENTRY SUB_LINK_ENTRY32
  78 #endif
  79
  80 #undef NATIVE_SYSTEM_HEADER_COMPONENT
  81 #define NATIVE_SYSTEM_HEADER_COMPONENT "MINGW"
  82
  83 #undef CPP_SPEC
  84 #define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{mthreads:-D_MT} " \
  85                  "%{" SPEC_PTHREAD1 ":-D_REENTRANT} " \
  86                  "%{" SPEC_PTHREAD2 ": } "
  87
  88 /* For Windows applications, include more libraries, but always include
  89    kernel32.  */
  90 #undef LIB_SPEC
  91 #define LIB_SPEC "%{pg:-lgmon} %{" SPEC_PTHREAD1 ":-lpthread} " \
  92                  "%{" SPEC_PTHREAD2 ": } " \
  93                  "%{mwindows:-lgdi32 -lcomdlg32} " \
  94      "%{fvtable-verify=preinit:-lvtv -lpsapi; \
  95         fvtable-verify=std:-lvtv -lpsapi} " \
  96                  "-ladvapi32 -lshell32 -luser32 -lkernel32"
  97
  98 /* Weak symbols do not get resolved if using a Windows dll import lib.
  99    Make the unwind registration references strong undefs.  */
 100 #if DWARF2_UNWIND_INFO
 101 /* DW2-unwind is just available for 32-bit mode.  */
 102 #if TARGET_64BIT_DEFAULT
 103 #define SHARED_LIBGCC_UNDEFS_SPEC \
 104   "%{m32: %{shared-libgcc: -u ___register_frame_info -u ___deregister_frame_info}}"
 105 #else
 106 #define SHARED_LIBGCC_UNDEFS_SPEC \
 107  "%{shared-libgcc: -u ___register_frame_info -u ___deregister_frame_info}"
 108 #endif
 109 #else
 110 #define SHARED_LIBGCC_UNDEFS_SPEC ""
 111 #endif
 112
 113 #undef  SUBTARGET_EXTRA_SPECS
 114 #define SUBTARGET_EXTRA_SPECS                                           \
 115   { "shared_libgcc_undefs", SHARED_LIBGCC_UNDEFS_SPEC }
 116
 117 #if ! MINGW_DEFAULT_LARGE_ADDR_AWARE
 118 /* This is used without --enable-large-address-aware.  */
 119 # define LINK_SPEC_LARGE_ADDR_AWARE ""
 120 #elif ! TARGET_BI_ARCH
 121 /* This is used on i686-pc-mingw32 with --enable-large-address-aware.  */
 122 # define LINK_SPEC_LARGE_ADDR_AWARE \
 123   "%{!shared:%{!mdll:--large-address-aware}}"
 124 #elif TARGET_64BIT_DEFAULT
 125 /* This is used on x86_64-pc-mingw32 with --enable-large-address-aware.
 126    ??? It probably doesn't work, because the linker emulation defaults
 127    to i386pep, the 64-bit mode that does not support
 128    --large-address-aware, and x86_64-pc-mingw32 does not override the
 129    emulation to i386pe for -m32, unlike x86_64-w64-mingw32.  */
 130 # define LINK_SPEC_LARGE_ADDR_AWARE \
 131   "%{!shared:%{!mdll:%{m32:--large-address-aware}}}"
 132 #else
 133 /* This would only be used if someone introduced a biarch
 134    configuration that defaulted to 32-bit.  */
 135 # define LINK_SPEC_LARGE_ADDR_AWARE \
 136   "%{!shared:%{!mdll:%{!m64:--large-address-aware}}}"
 137 #endif
 138
 139 #define LINK_SPEC "%{mwindows:--subsystem windows} \
 140   %{mconsole:--subsystem console} \
 141   %{shared: %{mdll: %eshared and mdll are not compatible}} \
 142   %{shared: --shared} %{mdll:--dll} \
 143   %{static:-Bstatic} %{!static:-Bdynamic} \
 144   %{shared|mdll: " SUB_LINK_ENTRY " --enable-auto-image-base} \
 145   " LINK_SPEC_LARGE_ADDR_AWARE "\
 146   %(shared_libgcc_undefs)"
 147
 148 /* Include in the mingw32 libraries with libgcc */
 149 #ifdef ENABLE_SHARED_LIBGCC
 150 #define SHARED_LIBGCC_SPEC " \
 151  %{static|static-libgcc:-lgcc -lgcc_eh} \
 152  %{!static: \
 153    %{!static-libgcc: \
 154      %{!shared: \
 155        %{!shared-libgcc:-lgcc -lgcc_eh} \
 156        %{shared-libgcc:-lgcc_s -lgcc} \
 157       } \
 158      %{shared:-lgcc_s -lgcc} \
 159     } \
 160   } "
 161 #else
 162 #define SHARED_LIBGCC_SPEC " -lgcc "
 163 #endif
 164 #undef REAL_LIBGCC_SPEC
 165 #define REAL_LIBGCC_SPEC \
 166   "%{mthreads:-lmingwthrd} -lmingw32 \
 167    " SHARED_LIBGCC_SPEC " \
 168    -lmoldname -lmingwex -lmsvcrt -lkernel32"
 169
 170 #undef STARTFILE_SPEC
 171 #define STARTFILE_SPEC "%{shared|mdll:dllcrt2%O%s} \
 172   %{!shared:%{!mdll:crt2%O%s}} %{pg:gcrt2%O%s} \
 173   crtbegin.o%s \
 174   %{fvtable-verify=none:%s; \
 175     fvtable-verify=preinit:vtv_start.o%s; \
 176     fvtable-verify=std:vtv_start.o%s}"
 177
 178 #undef ENDFILE_SPEC
 179 #define ENDFILE_SPEC \
 180   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
 181    %{!shared:%:if-exists(default-manifest.o%s)}\
 182    %{fvtable-verify=none:%s; \
 183     fvtable-verify=preinit:vtv_end.o%s; \
 184     fvtable-verify=std:vtv_end.o%s} \
 185   crtend.o%s"
 186
 187 /* Override startfile prefix defaults.  */
 188 #ifndef STANDARD_STARTFILE_PREFIX_1
 189 #define STANDARD_STARTFILE_PREFIX_1 "/mingw/lib/"
 190 #endif
 191 #ifndef STANDARD_STARTFILE_PREFIX_2
 192 #define STANDARD_STARTFILE_PREFIX_2 ""
 193 #endif
 194
 195 /* For native mingw-version we need to take care that NATIVE_SYSTEM_HEADER_DIR
 196    macro contains POSIX-style path.  See bug 52947.  */
 197 #undef NATIVE_SYSTEM_HEADER_DIR
 198 #define NATIVE_SYSTEM_HEADER_DIR "/mingw/include"
 199
 200 /* Output STRING, a string representing a filename, to FILE.
 201    We canonicalize it to be in Unix format (backslashes are replaced
 202    forward slashes.  */
 203 #undef OUTPUT_QUOTED_STRING
 204 #define OUTPUT_QUOTED_STRING(FILE, STRING)               \
 205 do {                                                     \
 206   const char *_string = (const char *) (STRING);         \
 207   char c;                                                \
 208                                                          \
 209   putc ('\"', (FILE));                                   \
 210                                                          \
 211   while ((c = *_string++) != 0)                          \
 212     {                                                    \
 213       if (c == '\\')                                     \
 214         c = '/';                                         \
 215                                                          \
 216       if (ISPRINT (c))                                   \
 217         {                                                \
 218           if (c == '\"')                                 \
 219             putc ('\\', (FILE));                         \
 220           putc (c, (FILE));                              \
 221         }                                                \
 222       else                                               \
 223         fprintf ((FILE), "\\%03o", (unsigned char) c);   \
 224     }                                                    \
 225                                                          \
 226   putc ('\"', (FILE));                                   \
 227 } while (0)
 228
 229 /* Define as short unsigned for compatibility with MS runtime.  */
 230 #undef WINT_TYPE
 231 #define WINT_TYPE "short unsigned int"
 232
 233 /* mingw32 uses the  -mthreads option to enable thread support.  */
 234 #undef GOMP_SELF_SPECS
 235 #define GOMP_SELF_SPECS "%{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1): " \
 236                         "-mthreads -pthread}"
 237 #undef GTM_SELF_SPECS
 238 #define GTM_SELF_SPECS "%{fgnu-tm:-mthreads -pthread}"
 239
 240 /* mingw32 atexit function is safe to use in shared libraries.  Use it
 241    to register C++ static destructors.  */
 242 #define TARGET_CXX_USE_ATEXIT_FOR_CXA_ATEXIT hook_bool_void_true
 243
 244 /* Contains a pointer to type target_ovr_attr defining the target specific
 245    overrides of format attributes.  See c-format.h for structure
 246    definition.  */
 247 #undef TARGET_OVERRIDES_FORMAT_ATTRIBUTES
 248 #define TARGET_OVERRIDES_FORMAT_ATTRIBUTES mingw_format_attribute_overrides
 249
 250 /* Specify the count of elements in TARGET_OVERRIDES_ATTRIBUTE.  */
 251 #undef TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT
 252 #define TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT 3
 253
 254 /* Custom initialization for warning -Wpedantic-ms-format for c-format.  */
 255 #undef TARGET_OVERRIDES_FORMAT_INIT
 256 #define TARGET_OVERRIDES_FORMAT_INIT msformat_init
 257
 258 /* MS specific format attributes for ms_printf, ms_scanf, ms_strftime.  */
 259 #undef TARGET_FORMAT_TYPES
 260 #define TARGET_FORMAT_TYPES mingw_format_attributes
 261
 262 #undef TARGET_N_FORMAT_TYPES
 263 #define TARGET_N_FORMAT_TYPES 3
 264
 265 #define HAVE_ENABLE_EXECUTE_STACK
 266 #undef  CHECK_EXECUTE_STACK_ENABLED
 267 #define CHECK_EXECUTE_STACK_ENABLED flag_setstackexecutable
 268
 269 /* This matches SHLIB_SONAME and SHLIB_SOVERSION in t-cygming. */
 270 /* This matches SHLIB_SONAME and SHLIB_SOVERSION in t-cygwin. */
 271 #if DWARF2_UNWIND_INFO
 272 #define LIBGCC_EH_EXTN "_dw2"
 273 #else
 274 #define LIBGCC_EH_EXTN "_sjlj"
 275 #endif
 276 #define LIBGCC_SONAME "libgcc_s" LIBGCC_EH_EXTN "-1.dll"
 277