1 ; Processor-independent options for Darwin.
3 ; Copyright (C) 2005-2023 Free Software Foundation, Inc.
5 ; This file is part of GCC.
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
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
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/>.
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:
24 ; Please place all Non-driver options first (in alphabetical order), followed
25 ; by Driver-only options.
30 C ObjC C++ ObjC++ Separate Alias(MF) MissingArgError(missing filename after %qs)
33 Target C++ Var(flag_apple_kext)
34 Generate code for darwin loadable kernel extensions.
37 ObjC ObjC++ Alias(mconstant-cfstrings)
38 Generate compile-time CFString objects.
41 Target RejectNegative C ObjC C++ ObjC++ Joined Separate
42 -iframework <dir> Add <dir> to the end of the system framework include path.
45 Target Var(darwin_constant_cfstrings) Init(1)
46 Generate compile-time CFString objects.
48 Wnonportable-cfstrings
49 Target Var(darwin_warn_nonportable_cfstrings) Init(1) Warning
50 Warn if constant CFString objects contain non-portable characters.
52 ; Use new-style pic stubs if this is true, x86 only so far.
54 Target Var(darwin_macho_att_stub) Init(1)
55 Generate AT&T-style stubs for Mach-O.
58 Target Common Mask(MACHO_DYNAMIC_NO_PIC)
59 Generate code suitable for executables (NOT shared libs).
62 Target Var(darwin_fix_and_continue)
63 Generate code suitable for fast turn around debugging.
66 Target Var(flag_mkernel)
67 Generate code for the kernel or loadable kernel extensions.
69 ; The Init here is for the convenience of GCC developers, so that cc1
70 ; and cc1plus don't crash if no -mmacosx-version-min is passed. The
71 ; driver will always pass a -mmacosx-version-min, so in normal use the
74 Target RejectNegative Joined Var(darwin_macosx_version_min) Init(DEF_MIN_OSX_VERSION)
75 The earliest macOS version on which this program will run.
77 ; Really, only relevant to PowerPC which has a 4 byte bool by default.
79 Target RejectNegative Var(darwin_one_byte_bool)
80 Set sizeof(bool) to 1.
83 Target Var(darwin_symbol_stubs) Init(0)
84 Force generation of external symbol indirection stubs.
86 ; Some code-gen may be improved / adjusted if the linker is sufficiently modern.
88 Target RejectNegative Joined Alias(mtarget-linker)
91 Target RejectNegative Joined Separate Var(darwin_target_linker) Init(LD64_VERSION)
92 -mtarget-linker <version> Specify that ld64 <version> is the toolchain linker for the current invocation.
98 Load all members of archive libraries, rather than only those that satisfy undefined symbols.
101 Driver RejectNegative Separate
102 -allowable_client <name> The output dylib is private to the client <name>.
105 Driver RejectNegative Separate
106 -arch <name> Generate output for architecture <name>.
109 Driver RejectNegative
110 Mismatches between file architecture and one specified by \"-arch\" are errors instead of warnings.
112 asm_macosx_version_min=
113 Driver RejectNegative Joined
114 The earliest macOS version on which this program will run (formatted for the assembler).
117 Driver RejectNegative
118 Generate an output executable that binds symbols on load, rather than lazily.
121 Driver RejectNegative
122 Generate a Mach-O bundle (file type MH_BUNDLE).
125 Driver RejectNegative Separate
126 -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.
129 Driver RejectNegative Separate
130 -client_name <name> Enable the executable being built to link against a private dylib (using allowable_client).
132 compatibility_version
133 Driver RejectNegative Separate
134 -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.
137 Driver RejectNegative Separate
138 -current_version <number> Set the current version for the library to <number>.
141 Driver RejectNegative
142 Remove code and data that is unreachable from any exported symbol (including the entry point).
145 Driver RejectNegative Separate
146 -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\"
149 Driver RejectNegative
150 Produce a Mach-O dylinker (file type MH_DYLINKER), only used for building dyld.
152 dylinker_install_name
153 Driver RejectNegative Separate
154 -dylinker_install_name <path> Only used for building dyld.
157 Driver RejectNegative
158 The default (and opposite of -static), implied by user mode executables, shared libraries and bundles.
161 Driver RejectNegative
162 Produce a Mach-O shared library (file type MH_DYLIB), synonym for \"-shared\".
164 exported_symbols_list
165 Driver RejectNegative Separate
166 -exported_symbols_list <filename> Export global symbols in <filename> in linked output file; any symbols not mentioned will be treated as \"hidden\".
169 Driver RejectNegative Separate
170 Supply a list of objects to be linked from a file, rather than the command line.
172 findirect-virtual-calls
173 Driver RejectNegative
174 Used for generating code for some older kernel revisions.
177 Driver RejectNegative
178 Ignore the normal two-level namespace; resolve symbols in command line order and do not record which library provided the resolved symbol.
181 Driver RejectNegative
182 For the assembler (and linker) permit any architecture sub-variant to be used without error.
185 Driver RejectNegative
186 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.
189 Driver RejectNegative Separate
190 -framework <name> The linker should search for the framework <name> in the framework search path.
193 Driver RejectNegative
194 Used for generating code for some older kernel revisions.
197 Driver RejectNegative
198 Abbreviation for \"-g -fno-eliminate-unused-debug-symbols\".
201 Driver RejectNegative
202 Abbreviation for \"-g -feliminate-unused-debug-symbols\".
204 headerpad_max_install_names
205 Driver RejectNegative
206 Automatically adds space for longer path names in load commands (up to MAXPATHLEN).
209 Driver RejectNegative Separate
210 -image_base <address> Specify <address> as the base address for a dylib or bundle.
213 Driver RejectNegative Separate
214 -init <symbol_name> The symbol <symbol_name> will be used as the first initialiser for a dylib.
217 Driver RejectNegative Separate
218 -install_name <name> Set the install name for a dylib.
221 Driver RejectNegative
222 Usually \"private extern\" (hidden) symbols are made local when linking, this command suppresses that such that they remain exported.
225 Driver RejectNegative
226 (Obsolete after 10.4) Multi modules are ignored at runtime since macOS 10.4.
229 Driver RejectNegative Separate
230 (Obsolete after 10.4) -multiply_defined <treatment> Provided a mechanism for warning about symbols defined in multiple dylibs.
232 multiply_defined_unused
233 Driver RejectNegative Separate
234 (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.
236 no_dead_strip_inits_and_terms
237 Driver RejectNegative
238 (Obsolete) Current linkers never dead-strip these items, so the option is not needed.
241 Driver RejectNegative
242 Do not add a default symbol exports to modules or dynamic libraries.
245 Driver RejectNegative
246 Do not add default run paths (for the compiler library directories) to executables, modules or dynamic libraries.
249 Driver RejectNegative
250 (Obsolete after 10.3.9) Set MH_NOPREFIXBINDING, in an executable.
253 Driver RejectNegative
254 (Obsolete after 10.4) Set MH_NOMULTIDEFS in an umbrella framework.
257 Driver RejectNegative Negative(prebind)
258 (Obsolete) LD_PREBIND is no longer supported.
261 Driver RejectNegative Negative(seglinkedit)
262 (Obsolete) This is the default.
265 Driver RejectNegative
268 Driver RejectNegative Separate
269 -pagezero_size <size> Allows setting the page 0 size to 4kb when required.
272 Driver RejectNegative Negative(noprebind)
273 (Obsolete) LD_PREBIND is no longer supported.
275 prebind_all_twolevel_modules
276 Driver RejectNegative
277 (Obsolete) LD_PREBIND is no longer supported.
280 Driver RejectNegative
281 Produces a Mach-O file suitable for embedded/ROM use.
284 Driver RejectNegative
285 (Obsolete) Allowed linking to proceed with \"-flat_namespace\" when a linked bundle contained a symbol also exported from the main executable.
288 Driver RejectNegative
291 Driver RejectNegative
292 Synonym for \"-export-dynamic\" for linker versions that support it.
295 Driver RejectNegative Separate
296 -read_only_relocs <treatment> Allow relocations in read-only pages (not recommended).
299 Driver RejectNegative Separate Args(3)
300 -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.
303 Driver RejectNegative Separate Args(3)
304 -sectcreate <segname> <sectname> <file> Create section <sectname> in segment <segname> from the contents of <file>.
307 Driver RejectNegative Separate Args(2)
308 (Obsolete) -sectobjectsymbols <segname> <sectname> Setting a local symbol at the start of a section is no longer supported.
311 Driver RejectNegative Separate Args(3)
312 (Obsolete) -sectorder <segname> <sectname> <orderfile> Replaced by a more general option \"-order_file\".
315 Driver RejectNegative Separate
316 -seg_addr_table <file> Specify the base addresses for dynamic libraries; <file> contains a line for each library.
318 ; This is only usable by the ld_classic linker.
319 seg_addr_table_filename
320 Driver RejectNegative Separate
321 (Obsolete, ld_classic only) -seg_addr_table_filename <path>.
324 Driver RejectNegative Separate
325 Synonym for \"image_base\".
328 Driver RejectNegative Separate Args(2)
329 -segaddr <name> <address> Set the base address of segment <name> to <address> which must be aligned to a page boundary (currently 4kb).
331 ; This is only usable by the ld_classic linker.
333 Driver RejectNegative Separate Args(3)
334 (Obsolete, ld_classic only) -sectcreate <segname> <sectname> <file> Allowed creation of a section from a file.
337 Driver RejectNegative Negative(noseglinkedit)
338 (Obsolete) Object files with LINKEDIT sections are no longer supported.
341 Driver RejectNegative Separate Args(3)
342 -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\".
345 Driver RejectNegative Separate
346 -segs_read_only_addr <address> Specify that <address> is the base address of the read-only segments of a dylib.
349 Driver RejectNegative Separate
350 -segs_read_write_addr <address> Specify that <address> is the base address address of the read-write segments of a dylib.
353 Driver RejectNegative
354 (Obsolete) This is the default.
357 Driver RejectNegative Separate
358 -sub_library <name> Library named <name> will be re-exported (only useful for dylibs).
361 Driver RejectNegative Separate
362 -sub_umbrella <name> Framework named <name> will be re-exported (only useful for dylibs).
365 Driver RejectNegative
368 twolevel_namespace_hints
369 Driver RejectNegative
370 Add extra information to the executable that can speed up dynamic loading (provided that dependent libraries are unchanged).
373 Driver RejectNegative
374 -umbrella <framework> The specified framework will be re-exported.
377 Driver RejectNegative Separate
378 -undefined <treatment> Specify the handling for undefined symbols (default is error).
380 unexported_symbols_list
381 Driver RejectNegative Separate
382 -unexported_symbols_list <filename> Do not export the global symbols listed in <filename>.
384 weak_reference_mismatches
385 Driver RejectNegative Separate
386 -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.
389 Driver RejectNegative
390 Logs which object files the linker loads.
393 Driver RejectNegative
394 Logs which symbol(s) caused an object to be loaded.
396 ;(Obsolete, ignored) Strip symbols starting with "L", this is the default.
398 Driver RejectNegative
401 Driver RejectNegative Joined
402 (Obsolete, ignored) Old support similar to \"-whyload\".
405 Driver RejectNegative
406 (Obsolete and unhandled by ld64, ignored) ld should produce an executable (only handled by ld_classic).