; Processor-independent options for Darwin. ; Copyright (C) 2005-2022 Free Software Foundation, Inc. ; ; This file is part of GCC. ; ; GCC is free software; you can redistribute it and/or modify it under ; the terms of the GNU General Public License as published by the Free ; Software Foundation; either version 3, or (at your option) any later ; version. ; ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY ; WARRANTY; without even the implied warranty of MERCHANTABILITY or ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ; for more details. ; ; You should have received a copy of the GNU General Public License ; along with GCC; see the file COPYING3. If not see ; . ; We have a lot of Driver options, many of which are obsolete or very very ; rarely used so, to keep this file easier to manage: ; Please place all Non-driver options first (in alphabetical order), followed ; by Driver-only options. ; Non-driver options. dependency-file C ObjC C++ ObjC++ Separate Alias(MF) MissingArgError(missing filename after %qs) fapple-kext Target C++ Var(flag_apple_kext) Generate code for darwin loadable kernel extensions. iframework Target RejectNegative C ObjC C++ ObjC++ Joined Separate -iframework Add to the end of the system framework include path. mconstant-cfstrings Target Var(darwin_constant_cfstrings) Init(1) Generate compile-time CFString objects. Wnonportable-cfstrings Target Var(darwin_warn_nonportable_cfstrings) Init(1) Warning Warn if constant CFString objects contain non-portable characters. ; Use new-style pic stubs if this is true, x86 only so far. matt-stubs Target Var(darwin_macho_att_stub) Init(1) Generate AT&T-style stubs for Mach-O. mdynamic-no-pic Target Common Mask(MACHO_DYNAMIC_NO_PIC) Generate code suitable for executables (NOT shared libs). mfix-and-continue Target Var(darwin_fix_and_continue) Generate code suitable for fast turn around debugging. mkernel Target Var(flag_mkernel) Generate code for the kernel or loadable kernel extensions. ; The Init here is for the convenience of GCC developers, so that cc1 ; and cc1plus don't crash if no -mmacosx-version-min is passed. The ; driver will always pass a -mmacosx-version-min, so in normal use the ; Init is never used. mmacosx-version-min= Target RejectNegative Joined Var(darwin_macosx_version_min) Init(DEF_MIN_OSX_VERSION) The earliest macOS version on which this program will run. ; Really, only relevant to PowerPC which has a 4 byte bool by default. mone-byte-bool Target RejectNegative Var(darwin_one_byte_bool) Set sizeof(bool) to 1. msymbol-stubs Target Var(darwin_symbol_stubs) Init(0) Force generation of external symbol indirection stubs. ; Some code-gen may be improved / adjusted if the linker is sufficiently modern. mtarget-linker= Target RejectNegative Joined Alias(mtarget-linker) mtarget-linker Target RejectNegative Joined Separate Var(darwin_target_linker) Init(LD64_VERSION) -mtarget-linker Specify that ld64 is the toolchain linker for the current invocation. ; Driver options. all_load Driver RejectNegative Load all members of archive libraries, rather than only those that satisfy undefined symbols. allowable_client Driver RejectNegative Separate -allowable_client The output dylib is private to the client . arch Driver RejectNegative Separate -arch Generate output for architecture . arch_errors_fatal Driver RejectNegative Mismatches between file architecture and one specified by \"-arch\" are errors instead of warnings. asm_macosx_version_min= Driver RejectNegative Joined The earliest macOS version on which this program will run (formatted for the assembler). bind_at_load Driver RejectNegative Generate an output executable that binds symbols on load, rather than lazily. bundle Driver RejectNegative Generate a Mach-O bundle (file type MH_BUNDLE). bundle_loader Driver RejectNegative Separate -bundle_loader Treat (that will be loading this bundle) as if it was one of the dynamic libraries the bundle is linked against for symbol resolution. client_name Driver RejectNegative Separate -client_name Enable the executable being built to link against a private dylib (using allowable_client). compatibility_version Driver RejectNegative Separate -compatibility_version Set the version for the client interface. Client programs must record a value less than or equal to , or the binding will fail at runtime. current_version Driver RejectNegative Separate -current_version Set the current version for the library to . dead_strip Driver RejectNegative Remove code and data that is unreachable from any exported symbol (including the entry point). dylib_file Driver RejectNegative Separate -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\" dylinker Driver RejectNegative Produce a Mach-O dylinker (file type MH_DYLINKER), only used for building dyld. dylinker_install_name Driver RejectNegative Separate -dylinker_install_name Only used for building dyld. dynamic Driver RejectNegative The default (and opposite of -static), implied by user mode executables, shared libraries and bundles. dynamiclib Driver RejectNegative Produce a Mach-O shared library (file type MH_DYLIB), synonym for \"-shared\". exported_symbols_list Driver RejectNegative Separate -exported_symbols_list Export global symbols in in linked output file; any symbols not mentioned will be treated as \"hidden\". filelist Driver RejectNegative Separate Supply a list of objects to be linked from a file, rather than the command line. findirect-virtual-calls Driver RejectNegative Used for generating code for some older kernel revisions. flat_namespace Driver RejectNegative Ignore the normal two-level namespace; resolve symbols in command line order and do not record which library provided the resolved symbol. force_cpusubtype_ALL Driver RejectNegative For the assembler (and linker) permit any architecture sub-variant to be used without error. force_flat_namespace Driver RejectNegative 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. framework Driver RejectNegative Separate -framework The linker should search for the framework in the framework search path. fterminated-vtables Driver RejectNegative Used for generating code for some older kernel revisions. gfull Driver RejectNegative Abbreviation for \"-g -fno-eliminate-unused-debug-symbols\". gused Driver RejectNegative Abbreviation for \"-g -feliminate-unused-debug-symbols\". headerpad_max_install_names Driver RejectNegative Automatically adds space for longer path names in load commands (up to MAXPATHLEN). image_base Driver RejectNegative Separate -image_base
Specify
as the base address for a dylib or bundle. init Driver RejectNegative Separate -init The symbol will be used as the first initialiser for a dylib. install_name Driver RejectNegative Separate -install_name Set the install name for a dylib. keep_private_externs Driver RejectNegative Usually \"private extern\" (hidden) symbols are made local when linking, this command suppresses that such that they remain exported. multi_module Driver RejectNegative (Obsolete after 10.4) Multi modules are ignored at runtime since macOS 10.4. multiply_defined Driver RejectNegative Separate (Obsolete after 10.4) -multiply_defined Provided a mechanism for warning about symbols defined in multiple dylibs. multiply_defined_unused Driver RejectNegative Separate (Obsolete after 10.4) -multiply_defined_unused Provided a mechanism for warning about symbols defined in the current executable also being defined in linked dylibs. no_dead_strip_inits_and_terms Driver RejectNegative (Obsolete) Current linkers never dead-strip these items, so the option is not needed. nodefaultexport Driver RejectNegative Do not add a default symbol exports to modules or dynamic libraries. nofixprebinding Driver RejectNegative (Obsolete after 10.3.9) Set MH_NOPREFIXBINDING, in an executable. nomultidefs Driver RejectNegative (Obsolete after 10.4) Set MH_NOMULTIDEFS in an umbrella framework. noprebind Driver RejectNegative Negative(prebind) (Obsolete) LD_PREBIND is no longer supported. noseglinkedit Driver RejectNegative Negative(seglinkedit) (Obsolete) This is the default. object Driver RejectNegative pagezero_size Driver RejectNegative Separate -pagezero_size Allows setting the page 0 size to 4kb when required. prebind Driver RejectNegative Negative(noprebind) (Obsolete) LD_PREBIND is no longer supported. prebind_all_twolevel_modules Driver RejectNegative (Obsolete) LD_PREBIND is no longer supported. preload Driver RejectNegative Produces a Mach-O file suitable for embedded/ROM use. private_bundle Driver RejectNegative (Obsolete) Allowed linking to proceed with \"-flat_namespace\" when a linked bundle contained a symbol also exported from the main executable. pthread Driver RejectNegative rdynamic Driver RejectNegative Synonym for \"-export-dynamic\" for linker versions that support it. read_only_relocs Driver RejectNegative Separate -read_only_relocs Allow relocations in read-only pages (not recommended). sectalign Driver RejectNegative Separate Args(3) -sectalign Set section in segment to have alignment which must be an integral power of two expressed in hexadecimal form. sectcreate Driver RejectNegative Separate Args(3) -sectcreate Create section in segment from the contents of . sectobjectsymbols Driver RejectNegative Separate Args(2) (Obsolete) -sectobjectsymbols Setting a local symbol at the start of a section is no longer supported. sectorder Driver RejectNegative Separate Args(3) (Obsolete) -sectorder Replaced by a more general option \"-order_file\". seg_addr_table Driver RejectNegative Separate -seg_addr_table Specify the base addresses for dynamic libraries; contains a line for each library. ; This is only usable by the ld_classic linker. seg_addr_table_filename Driver RejectNegative Separate (Obsolete, ld_classic only) -seg_addr_table_filename . seg1addr Driver RejectNegative Separate Synonym for \"image_base\". segaddr Driver RejectNegative Separate Args(2) -segaddr
Set the base address of segment to
which must be aligned to a page boundary (currently 4kb). ; This is only usable by the ld_classic linker. segcreate Driver RejectNegative Separate Args(3) (Obsolete, ld_classic only) -sectcreate Allowed creation of a section from a file. seglinkedit Driver RejectNegative Negative(noseglinkedit) (Obsolete) Object files with LINKEDIT sections are no longer supported. segprot Driver RejectNegative Separate Args(3) -segprot The virtual memory protections for segment have maximum and initial values and respectively. The specified values may contain \"r\", \"w\", \"x\" or \"-\" the latter meaning \"no access\". segs_read_only_addr Driver RejectNegative Separate -segs_read_only_addr
Specify that
is the base address of the read-only segments of a dylib. segs_read_write_addr Driver RejectNegative Separate -segs_read_write_addr
Specify that
is the base address address of the read-write segments of a dylib. single_module Driver RejectNegative (Obsolete) This is the default. sub_library Driver RejectNegative Separate -sub_library Library named will be re-exported (only useful for dylibs). sub_umbrella Driver RejectNegative Separate -sub_umbrella Framework named will be re-exported (only useful for dylibs). twolevel_namespace Driver RejectNegative This is the default. twolevel_namespace_hints Driver RejectNegative Add extra information to the executable that can speed up dynamic loading (provided that dependent libraries are unchanged). umbrella Driver RejectNegative -umbrella The specified framework will be re-exported. undefined Driver RejectNegative Separate -undefined Specify the handling for undefined symbols (default is error). unexported_symbols_list Driver RejectNegative Separate -unexported_symbols_list Do not export the global symbols listed in . weak_reference_mismatches Driver RejectNegative Separate -weak_reference_mismatches 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. whatsloaded Driver RejectNegative Logs which object files the linker loads. whyload Driver RejectNegative Logs which symbol(s) caused an object to be loaded. ;(Obsolete, ignored) Strip symbols starting with "L", this is the default. X Driver RejectNegative y Driver RejectNegative Joined (Obsolete, ignored) Old support similar to \"-whyload\". Mach Driver RejectNegative (Obsolete and unhandled by ld64, ignored) ld should produce an executable (only handled by ld_classic).