gcc/config/darwin.opt

   1 ; Processor-independent options for Darwin.
   2
   3 ; Copyright (C) 2005-2023 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 it under
   8 ; the terms of the GNU General Public License as published by the Free
   9 ; Software Foundation; either version 3, or (at your option) any later
  10 ; version.
  11 ;
  12 ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 ; WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 ; FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 ; 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 ; We have a lot of Driver options, many of which are obsolete or very very
  22 ; rarely used so, to keep this file easier to manage:
  23
  24 ; Please place all Non-driver options first (in alphabetical order), followed
  25 ; by Driver-only options.
  26
  27 ; Non-driver options.
  28
  29 dependency-file
  30 C ObjC C++ ObjC++ Separate Alias(MF) MissingArgError(missing filename after %qs)
  31
  32 fapple-kext
  33 Target C++ Var(flag_apple_kext)
  34 Generate code for darwin loadable kernel extensions.
  35
  36 iframework
  37 Target RejectNegative C ObjC C++ ObjC++ Joined Separate
  38 -iframework <dir>       Add <dir> to the end of the system framework include path.
  39
  40 mconstant-cfstrings
  41 Target Var(darwin_constant_cfstrings) Init(1)
  42 Generate compile-time CFString objects.
  43
  44 Wnonportable-cfstrings
  45 Target Var(darwin_warn_nonportable_cfstrings) Init(1) Warning
  46 Warn if constant CFString objects contain non-portable characters.
  47
  48 ; Use new-style pic stubs if this is true, x86 only so far.
  49 matt-stubs
  50 Target Var(darwin_macho_att_stub) Init(1)
  51 Generate AT&T-style stubs for Mach-O.
  52
  53 mdynamic-no-pic
  54 Target Common Mask(MACHO_DYNAMIC_NO_PIC)
  55 Generate code suitable for executables (NOT shared libs).
  56
  57 mfix-and-continue
  58 Target Var(darwin_fix_and_continue)
  59 Generate code suitable for fast turn around debugging.
  60
  61 mkernel
  62 Target Var(flag_mkernel)
  63 Generate code for the kernel or loadable kernel extensions.
  64
  65 ; The Init here is for the convenience of GCC developers, so that cc1
  66 ; and cc1plus don't crash if no -mmacosx-version-min is passed.  The
  67 ; driver will always pass a -mmacosx-version-min, so in normal use the
  68 ; Init is never used.
  69 mmacosx-version-min=
  70 Target RejectNegative Joined Var(darwin_macosx_version_min) Init(DEF_MIN_OSX_VERSION)
  71 The earliest macOS version on which this program will run.
  72
  73 ; Really, only relevant to PowerPC which has a 4 byte bool by default.
  74 mone-byte-bool
  75 Target RejectNegative Var(darwin_one_byte_bool)
  76 Set sizeof(bool) to 1.
  77
  78 msymbol-stubs
  79 Target Var(darwin_symbol_stubs) Init(0)
  80 Force generation of external symbol indirection stubs.
  81
  82 ; Some code-gen may be improved / adjusted if the linker is sufficiently modern.
  83 mtarget-linker=
  84 Target RejectNegative Joined Alias(mtarget-linker)
  85
  86 mtarget-linker
  87 Target RejectNegative Joined Separate Var(darwin_target_linker) Init(LD64_VERSION)
  88 -mtarget-linker <version>       Specify that ld64 <version> is the toolchain linker for the current invocation.
  89
  90 ; Driver options.
  91
  92 all_load
  93 Driver RejectNegative
  94 Load all members of archive libraries, rather than only those that satisfy undefined symbols.
  95
  96 allowable_client
  97 Driver RejectNegative Separate
  98 -allowable_client <name>        The output dylib is private to the client <name>.
  99
 100 arch
 101 Driver RejectNegative Separate
 102 -arch <name>    Generate output for architecture <name>.
 103
 104 arch_errors_fatal
 105 Driver RejectNegative
 106 Mismatches between file architecture and one specified by \"-arch\" are errors instead of warnings.
 107
 108 asm_macosx_version_min=
 109 Driver RejectNegative Joined
 110 The earliest macOS version on which this program will run (formatted for the assembler).
 111
 112 bind_at_load
 113 Driver RejectNegative
 114 Generate an output executable that binds symbols on load, rather than lazily.
 115
 116 bundle
 117 Driver RejectNegative
 118 Generate a Mach-O bundle (file type MH_BUNDLE).
 119
 120 bundle_loader
 121 Driver RejectNegative Separate
 122 -bundle_loader <executable>     Treat <executable> (that will be loading this bundle) as if it was one of the dynamic libraries the bundle is linked against for symbol resolution.
 123
 124 client_name
 125 Driver RejectNegative Separate
 126 -client_name <name>     Enable the executable being built to link against a private dylib (using allowable_client).
 127
 128 compatibility_version
 129 Driver RejectNegative Separate
 130 -compatibility_version <number> Set the version for the client interface.  Client programs must record a value less than or equal to <number>, or the binding will fail at runtime.
 131
 132 current_version
 133 Driver RejectNegative Separate
 134 -current_version <number>       Set the current version for the library to <number>.
 135
 136 dead_strip
 137 Driver RejectNegative
 138 Remove code and data that is unreachable from any exported symbol (including the entry point).
 139
 140 dylib_file
 141 Driver RejectNegative Separate
 142 -dylib_file install_name:file_name      This allows linking of a dylib with \"install_name\" but to be found in a different install position \"file_name\"
 143
 144 dylinker
 145 Driver RejectNegative
 146 Produce a Mach-O dylinker (file type MH_DYLINKER), only used for building dyld.
 147
 148 dylinker_install_name
 149 Driver RejectNegative Separate
 150 -dylinker_install_name <path>   Only used for building dyld.
 151
 152 dynamic
 153 Driver RejectNegative
 154 The default (and opposite of -static), implied by user mode executables, shared libraries and bundles.
 155
 156 dynamiclib
 157 Driver RejectNegative
 158 Produce a Mach-O shared library (file type MH_DYLIB), synonym for \"-shared\".
 159
 160 exported_symbols_list
 161 Driver RejectNegative Separate
 162 -exported_symbols_list <filename>       Export global symbols in <filename> in linked output file; any symbols not mentioned will be treated as \"hidden\".
 163
 164 filelist
 165 Driver RejectNegative Separate
 166 Supply a list of objects to be linked from a file, rather than the command line.
 167
 168 findirect-virtual-calls
 169 Driver RejectNegative
 170 Used for generating code for some older kernel revisions.
 171
 172 flat_namespace
 173 Driver RejectNegative
 174 Ignore the normal two-level namespace; resolve symbols in command line order and do not record which library provided the resolved symbol.
 175
 176 force_cpusubtype_ALL
 177 Driver RejectNegative
 178 For the assembler (and linker) permit any architecture sub-variant to be used without error.
 179
 180 force_flat_namespace
 181 Driver RejectNegative
 182 Set the output object such that, on loading, dyld will ignore any two-level namespace information and resolve symbols in the discovery order for loaded libs.
 183
 184 framework
 185 Driver RejectNegative Separate
 186 -framework <name>       The linker should search for the framework <name> in the framework search path.
 187
 188 fterminated-vtables
 189 Driver RejectNegative
 190 Used for generating code for some older kernel revisions.
 191
 192 gfull
 193 Driver RejectNegative
 194 Abbreviation for \"-g -fno-eliminate-unused-debug-symbols\".
 195
 196 gused
 197 Driver RejectNegative
 198 Abbreviation for \"-g -feliminate-unused-debug-symbols\".
 199
 200 headerpad_max_install_names
 201 Driver RejectNegative
 202 Automatically adds space for longer path names in load commands (up to MAXPATHLEN).
 203
 204 image_base
 205 Driver RejectNegative Separate
 206 -image_base <address>   Specify <address> as the base address for a dylib or bundle.
 207
 208 init
 209 Driver RejectNegative Separate
 210 -init <symbol_name>     The symbol <symbol_name> will be used as the first initialiser for a dylib.
 211
 212 install_name
 213 Driver RejectNegative Separate
 214 -install_name <name>    Set the install name for a dylib.
 215
 216 keep_private_externs
 217 Driver RejectNegative
 218 Usually \"private extern\" (hidden) symbols are made local when linking, this command suppresses that such that they remain exported.
 219
 220 multi_module
 221 Driver RejectNegative
 222 (Obsolete after 10.4) Multi modules are ignored at runtime since macOS 10.4.
 223
 224 multiply_defined
 225 Driver RejectNegative Separate
 226 (Obsolete after 10.4) -multiply_defined <treatment>     Provided a mechanism for warning about symbols defined in multiple dylibs.
 227
 228 multiply_defined_unused
 229 Driver RejectNegative Separate
 230 (Obsolete after 10.4) -multiply_defined_unused <treatment>      Provided a mechanism for warning about symbols defined in the current executable also being defined in linked dylibs.
 231
 232 no_dead_strip_inits_and_terms
 233 Driver RejectNegative
 234 (Obsolete) Current linkers never dead-strip these items, so the option is not needed.
 235
 236 nodefaultexport
 237 Driver RejectNegative
 238 Do not add a default symbol exports to modules or dynamic libraries.
 239
 240 nofixprebinding
 241 Driver RejectNegative
 242 (Obsolete after 10.3.9) Set MH_NOPREFIXBINDING, in an executable.
 243
 244 nomultidefs
 245 Driver RejectNegative
 246 (Obsolete after 10.4)   Set MH_NOMULTIDEFS in an umbrella framework.
 247
 248 noprebind
 249 Driver RejectNegative Negative(prebind)
 250 (Obsolete) LD_PREBIND is no longer supported.
 251
 252 noseglinkedit
 253 Driver RejectNegative Negative(seglinkedit)
 254 (Obsolete) This is the default.
 255
 256 object
 257 Driver RejectNegative
 258
 259 pagezero_size
 260 Driver RejectNegative Separate
 261 -pagezero_size <size>   Allows setting the page 0 size to 4kb when required.
 262
 263 prebind
 264 Driver RejectNegative Negative(noprebind)
 265 (Obsolete) LD_PREBIND is no longer supported.
 266
 267 prebind_all_twolevel_modules
 268 Driver RejectNegative
 269 (Obsolete) LD_PREBIND is no longer supported.
 270
 271 preload
 272 Driver RejectNegative
 273 Produces a Mach-O file suitable for embedded/ROM use.
 274
 275 private_bundle
 276 Driver RejectNegative
 277 (Obsolete) Allowed linking to proceed with \"-flat_namespace\" when a linked bundle contained a symbol also exported from the main executable.
 278
 279 pthread
 280 Driver RejectNegative
 281
 282 rdynamic
 283 Driver RejectNegative
 284 Synonym for \"-export-dynamic\" for linker versions that support it.
 285
 286 read_only_relocs
 287 Driver RejectNegative Separate
 288 -read_only_relocs <treatment>   Allow relocations in read-only pages (not recommended).
 289
 290 sectalign
 291 Driver RejectNegative Separate Args(3)
 292 -sectalign <segname> <sectname> <value> Set section <sectname> in segment <segname> to have alignment <value> which must be an integral power of two expressed in hexadecimal form.
 293
 294 sectcreate
 295 Driver RejectNegative Separate Args(3)
 296 -sectcreate <segname> <sectname> <file> Create section <sectname> in segment <segname> from the contents of <file>.
 297
 298 sectobjectsymbols
 299 Driver RejectNegative Separate Args(2)
 300 (Obsolete) -sectobjectsymbols <segname> <sectname>      Setting a local symbol at the start of a section is no longer supported.
 301
 302 sectorder
 303 Driver RejectNegative Separate Args(3)
 304 (Obsolete) -sectorder <segname> <sectname> <orderfile>  Replaced by a more general option \"-order_file\".
 305
 306 seg_addr_table
 307 Driver RejectNegative Separate
 308 -seg_addr_table <file>  Specify the base addresses for dynamic libraries; <file> contains a line for each library.
 309
 310 ; This is only usable by the ld_classic linker.
 311 seg_addr_table_filename
 312 Driver RejectNegative Separate
 313 (Obsolete, ld_classic only) -seg_addr_table_filename <path>.
 314
 315 seg1addr
 316 Driver RejectNegative Separate
 317 Synonym for \"image_base\".
 318
 319 segaddr
 320 Driver RejectNegative Separate Args(2)
 321 -segaddr <name> <address>       Set the base address of segment <name> to <address> which must be aligned to a page boundary (currently 4kb).
 322
 323 ; This is only usable by the ld_classic linker.
 324 segcreate
 325 Driver RejectNegative Separate Args(3)
 326 (Obsolete, ld_classic only) -sectcreate <segname> <sectname> <file>     Allowed creation of a section from a file.
 327
 328 seglinkedit
 329 Driver RejectNegative Negative(noseglinkedit)
 330 (Obsolete) Object files with LINKEDIT sections are no longer supported.
 331
 332 segprot
 333 Driver RejectNegative Separate Args(3)
 334 -segprot <segname> <max_prot> <init_prot>       The virtual memory protections for segment <segname> have maximum and initial values <max_prot> and <init_prot> respectively.  The specified values may contain \"r\", \"w\", \"x\" or \"-\" the latter meaning \"no access\".
 335
 336 segs_read_only_addr
 337 Driver RejectNegative Separate
 338 -segs_read_only_addr <address>  Specify that <address> is the base address of the read-only segments of a dylib.
 339
 340 segs_read_write_addr
 341 Driver RejectNegative Separate
 342 -segs_read_write_addr <address> Specify that <address> is the base address address of the read-write segments of a dylib.
 343
 344 single_module
 345 Driver RejectNegative
 346 (Obsolete)      This is the default.
 347
 348 sub_library
 349 Driver RejectNegative Separate
 350 -sub_library <name>     Library named <name> will be re-exported (only useful for dylibs).
 351
 352 sub_umbrella
 353 Driver RejectNegative Separate
 354 -sub_umbrella <name>    Framework named <name> will be re-exported (only useful for dylibs).
 355
 356 twolevel_namespace
 357 Driver RejectNegative
 358 This is the default.
 359
 360 twolevel_namespace_hints
 361 Driver RejectNegative
 362 Add extra information to the executable that can speed up dynamic loading (provided that dependent libraries are unchanged).
 363
 364 umbrella
 365 Driver RejectNegative
 366 -umbrella <framework>   The specified framework will be re-exported.
 367
 368 undefined
 369 Driver RejectNegative Separate
 370 -undefined <treatment>  Specify the handling for undefined symbols (default is error).
 371
 372 unexported_symbols_list
 373 Driver RejectNegative Separate
 374 -unexported_symbols_list <filename>     Do not export the global symbols listed in <filename>.
 375
 376 weak_reference_mismatches
 377 Driver RejectNegative Separate
 378 -weak_reference_mismatches <treatment>  Specifies what to do if a symbol import conflicts between file (weak in one and not in another) the default is to treat the symbol as non-weak.
 379
 380 whatsloaded
 381 Driver RejectNegative
 382 Logs which object files the linker loads.
 383
 384 whyload
 385 Driver RejectNegative
 386 Logs which symbol(s) caused an object to be loaded.
 387
 388 ;(Obsolete, ignored)    Strip symbols starting with "L", this is the default.
 389 X
 390 Driver RejectNegative
 391
 392 y
 393 Driver RejectNegative Joined
 394 (Obsolete, ignored)     Old support similar to \"-whyload\".
 395
 396 Mach
 397 Driver RejectNegative
 398 (Obsolete and unhandled by ld64, ignored)       ld should produce an executable (only handled by ld_classic).