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LD.LLD(1) FreeBSD General Commands Manual LD.LLD(1) NAME ld.lld -- ELF linker from the LLVM project SYNOPSIS ld.lld [options] objfile ... DESCRIPTION A linker takes one or more object, archive, and library files, and com- bines them into an output file (an executable, a shared library, or another object file). It relocates code and data from the input files and resolves symbol references between them. ld.lld is a drop-in replacement for the GNU BFD and gold linkers. It accepts most of the same command line arguments and linker scripts as GNU linkers. Many options have both a single-letter and long form. When using the long form options other than those beginning with the letter o may be specified using either one or two dashes preceeding the option name. Long options beginning with o require two dashes to avoid confusion with the -o path option. These options are available: --allow-multiple-definition Do not error if a symbol is defined multiple times. The first definition will be used. --as-needed Only set DT_NEEDED for shared libraries if used. --auxiliary value Set the DT_AUXILIARY field to the specified name. --Bdynamic Link against shared libraries. --Bstatic Do not link against shared libraries. --Bsymbolic-functions Bind defined function symbols locally. --Bsymbolic Bind defined symbols locally. --build-id=value Generate a build ID note. value may be one of md5, sha1, tree, uuid, 0xhex-string, and none. tree is an alias for sha1. Build- IDs of type md5, sha1, and tree are calculated from the object contents. --build-id Generate a build ID note. --color-diagnostics=value Use colors in diagnostics. value may be one of always, auto, and never. auto enables color if and only if output is to a termi- nal. --color-diagnostics Alias for --color-diagnostics=auto. --compress-debug-sections=value Compress DWARF debug sections. value may be none or zlib. --define-common Assign space to common symbols. --defsym=symbol=expression Define a symbol alias. expression may be another symbol or a linker script expression. For example, --defsym=foo=bar or --defsym=foo=bar+0x100. --demangle Demangle symbol names. --disable-new-dtags Disable new dynamic tags. --discard-all Delete all local symbols. --discard-locals Delete temporary local symbols. --discard-none Keep all symbols in the symbol table. --dynamic-linker value Specify the dynamic linker to be used for a dynamically linked executable. This is recorded in an ELF segment of type PT_INTERP. --dynamic-list file Read a list of dynamic symbols from file. --eh-frame-hdr Request creation of .eh_frame_hdr section and PT_GNU_EH_FRAME segment header. --emit-relocs Generate relocations in the output. --enable-new-dtags Enable new dynamic tags. --end-lib End a grouping of objects that should be treated as if they were together in an archive. --entry entry Name of entry point symbol. --error-limit value Maximum number of errors to emit before stopping. A value of zero indicates that there is no limit. --error-unresolved-symbols Report unresolved symbols as errors. --exclude-libs value Exclude static libraries from automatic export. --export-dynamic-symbol symbol Include symbol in the dynamic symbol table. --export-dynamic Put symbols in the dynamic symbol table. --fatal-warnings Treat warnings as errors. --filter=value Set the DT_FILTER field to the specified value. --fini symbol Specify a finalizer function. --format=input-format Specify the format of the inputs following this option. input-format may be one of binary, elf, and default. default is a synonym for elf. --gc-sections Enable garbage collection of unused sections. --gdb-index Generate .gdb_index section. --hash-style value Specify hash style. value may be sysv, gnu, or both. both is the default. --help Print a usage message. --icf=all Enable identical code folding. --icf=none Disable identical code folding. --image-base=value Set the base address to value. --init symbol Specify an initializer function. --lto-aa-pipeline=value AA pipeline to run during LTO. Used in conjunction with --lto-newpm-passes. --lto-newpm-passes=value Passes to run during LTO. --lto-O opt-level Optimization level for LTO. --lto-partitions=value Number of LTO codegen partitions. -L dir Add a directory to the library search path. -l libName Root name of library to use. --Map file Print a link map to file. -m value Set target emulation. --no-as-needed Always set DT_NEEDED for shared libraries. --no-color-diagnostics Do not use colors in diagnostics. --no-define-common Do not assign space to common symbols. --no-demangle Do not demangle symbol names. --no-dynamic-linker Inhibit output of an .interp section. --no-gc-sections Disable garbage collection of unused sections. --no-gnu-unique Disable STB_GNU_UNIQUE symbol binding. --no-rosegment Do not put read-only non-executable sections in their own seg- ment. --no-threads Do not run the linker multi-threaded. --no-undefined-version Report version scripts that refer undefined symbols. --no-undefined Report unresolved symbols even if the linker is creating a shared library. --no-whole-archive Restores the default behavior of loading archive members. --noinhibit-exec Retain the executable output file whenever it is still usable. --no-pie Do not create a position independent executable. --nostdlib Only search directories specified on the command line. --oformat format Specify the format for the output object file. The only sup- ported format is binary, which produces output with no ELF header. --omagic Set the text and data sections to be readable and writable. --opt-remarks-filename file Write optimization remarks in YAML format to file. --opt-remarks-with-hotness Include hotness information in the optimization remarks file. -O value Optimize output file size. value may be: O0 Disable string merging. O1 Enable string merging. O2 Enable string tail merging. O1 is the default. -o path Write the output executable, library, or object to path. If not specified, a.out is used as a default. --pie Create a position independent executable. --print-gc-sections List removed unused sections. --print-map Print a link map to the standard output. --relocatable Create relocatable object file. --reproduce value Dump linker invocation and input files for debugging. --retain-symbols-file=file Retain only the symbols listed in the file. --rpath value Add a DT_RUNPATH to the output. --rsp-quoting=value Quoting style for response files. The supported values are windows and posix. --script file Read linker script from file. --section-start address Set address of section. --shared Build a shared object. --soname=value Set DT_SONAME to value. --sort-section value Specifies sections sorting rule when linkerscript is used. --start-lib Start a grouping of objects that should be treated as if they were together in an archive. --strip-all Strip all symbols. --strip-debug Strip debugging information. --symbol-ordering-file file Lay out sections in the order specified by file. --sysroot=value Set the system root. --target1-abs Interpret R_ARM_TARGET1 as R_ARM_ABS32. --target1-rel Interpret R_ARM_TARGET1 as R_ARM_REL32. --target2=type Interpret R_ARM_TARGET2 as type, where type is one of rel, abs, or got-rel. --Tbss value Same as --section-start with .bss as the sectionname. --Tdata value Same as --section-start with .data as the sectionname. --thinlto-cache-dir=value Path to ThinLTO cached object file directory. --thinlto-cache-policy value Pruning policy for the ThinLTO cache. --thinlto-jobs=value Number of ThinLTO jobs. --threads Run the linker multi-threaded. This option is enabled by default. --trace-symbol symbol Trace references to symbol. --trace Print the names of the input files. --Ttext value Same as --section-start with .text as the sectionname. --undefined symbol Force symbol to be an undefined symbol during linking. --unresolved-symbols=value Determine how to handle unresolved symbols. --verbose Verbose mode. --version-script file Read version script from file. -V, --version Display the version number and exit. -v Display the version number and proceed with linking if object files are specified. --warn-common Warn about duplicate common symbols. --warn-unresolved-symbols Report unresolved symbols as warnings. --whole-archive Force load of all members in a static library. --wrap symbol Use wrapper functions for symbol. -z option Linker option extensions. execstack Make the main stack executable. Stack permissions are recorded in the PT_GNU_STACK segment. ifunc-noplt Do not emit PLT entries for GNU ifuncs. Instead, pre- serve relocations for ifunc call sites so that they may be applied by a run-time loader. Note that this feature requires special loader support and will generally result in application crashes when used outside of freestanding environments. interpose Set the DF_1_INTERPOSE flag to indicate that the object is an interposer. Runtime linkers perform symbol resolu- tion by first searching the application, followed by interposers, and then any other dependencies. muldefs Do not error if a symbol is defined multiple times. The first definition will be used. This is a synonym for --allow-multiple-definition. nocombreloc Disable combining and sorting multiple relocation sec- tions. nocopyreloc Disable the creation of copy relocations. nodelete Set the DF_1_NODELETE flag to indicate that the object cannot be unloaded from a process. nodlopen Set the DF_1_NOOPEN flag to indcate that the object may not be opened by dlopen(3). norelro Do not indicate that portions of the object shold be mapped read-only after initial relocation processing. The object will omit the PT_GNU_RELRO segment. notext Allow relocations against read-only segments. Sets the DT_TEXTREL flag in the DYNAMIC section. now Set the DF_BIND_NOW flag to indicate that the run-time loader should perform all relocation processing as part of object initialization. By default relocations may be performed on demand. origin Set the DF_ORIGIN flag to indicate that the object requires $ORIGIN processing. retpolineplt Emit retpoline format PLT entries as a mitigation for CVE-2017-5715. rodynamic Make the .dynamic section read-only. The DT_DEBUG tag will not be emitted. stack-size=size Set the main thread's stack size to size. The stack size is recorded as the size of the size. PT_GNU_STACK pro- gram segment. text Do not allow relocations against read-only segments. This is the default. wxneeded Create a PT_OPENBSD_WXNEEDED segment. FreeBSD Ports 11.2 September 14, 2018 FreeBSD Ports 11.2
NAME | SYNOPSIS | DESCRIPTION
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