GOLD

Section: User Commands (1)
Updated: February 2015
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NAME

gold - The GNU ELF linker

SYNOPSIS

ld.gold [,options/] ,file/...

OPTIONS

--help: Report usage information
-v, --version: Report version information
-V: Report version and target information
--add-needed: Not supported
--no-add-needed: Do not copy DT_NEEDED tags from shared libraries
--allow-multiple-definition Allow multiple definitions of symbols
--no-allow-multiple-definition: Do not allow multiple definitions
--allow-shlib-undefined: Allow unresolved references in shared libraries
--no-allow-shlib-undefined: Do not allow unresolved references in shared libraries
--as-needed: Only set DT_NEEDED for shared libraries if used
--no-as-needed: Always DT_NEEDED for shared libraries
-assert [ignored]: Ignored
-b [elf,binary], --format [elf,binary]: Set input format
-Bdynamic -l searches for shared libraries
-Bstatic -l does not search for shared libraries
-dy: alias for -Bdynamic
-dn: alias for -Bstatic
-Bgroup: Use group name lookup rules for shared library
-Bsymbolic: Bind defined symbols locally
-Bsymbolic-functions: Bind defined function symbols locally
--build-id [=STYLE]: Generate build ID note
--build-id-chunk-size-for-treehash SIZE: Chunk size for '--build-id=tree'
--build-id-min-file-size-for-treehash SIZE: Minimum output file size for '--build-id=tree' to work differently than '--build-id=sha1'
--check-sections: Check segment addresses for overlaps (default)
--no-check-sections: Do not check segment addresses for overlaps
--compress-debug-sections [none,zlib]: Compress .debug_* sections in the output file
--copy-dt-needed-entries: Not supported
--no-copy-dt-needed-entries Do not copy DT_NEEDED tags from shared libraries
--cref: Output cross reference table
--no-cref: Do not output cross reference table
--ctors-in-init-array: Use DT_INIT_ARRAY for all constructors (default)
--no-ctors-in-init-array: Handle constructors as directed by compiler
-d, --define-common: Define common symbols
--no-define-common: Do not define common symbols
-dc: Alias for -d
-dp: Alias for -d
--debug [all,files,script,task][,...]: Turn on debugging
--defsym SYMBOL=EXPRESSION: Define a symbol
--demangle [=STYLE]: Demangle C++ symbols in log messages
--no-demangle: Do not demangle C++ symbols in log messages
--detect-odr-violations: Look for violations of the C++ One Definition Rule
--no-detect-odr-violations: Do not look for violations of the C++ One Definition Rule
-x, --discard-all: Delete all local symbols
-X, --discard-locals: Delete all temporary local symbols
--dynamic-list-data: Add data symbols to dynamic symbols
--dynamic-list-cpp-new: Add C++ operator new/delete to dynamic symbols
--dynamic-list-cpp-typeinfo Add C++ typeinfo to dynamic symbols
--dynamic-list FILE: Read a list of dynamic symbols
-e ADDRESS, --entry ADDRESS Set program start address
--exclude-libs lib,lib ...: Exclude libraries from automatic export
-E, --export-dynamic: Export all dynamic symbols
--no-export-dynamic: Do not export all dynamic symbols (default)
--export-dynamic-symbol SYMBOL: Export SYMBOL to dynamic symbol table
-EB: Link big-endian objects.
-EL: Link little-endian objects.
--eh-frame-hdr: Create exception frame header
--no-enum-size-warning: (ARM only) Do not warn about objects with incompatible enum sizes
-f SHLIB, --auxiliary SHLIB Auxiliary filter for shared object symbol table
-F SHLIB, --filter SHLIB: Filter for shared object symbol table
--fatal-warnings: Treat warnings as errors
--no-fatal-warnings: Do not treat warnings as errors
-fini SYMBOL: Call SYMBOL at unload-time
--fix-cortex-a8: (ARM only) Fix binaries for Cortex-A8 erratum.
--no-fix-cortex-a8: (ARM only) Do not fix binaries for Cortex-A8 erratum.
--fix-arm1176: (ARM only) Fix binaries for ARM1176 erratum.
--no-fix-arm1176: (ARM only) Do not fix binaries for ARM1176 erratum.
--merge-exidx-entries: (ARM only) Merge exidx entries in debuginfo.
--no-merge-exidx-entries: (ARM only) Do not merge exidx entries in debuginfo.
--fix-v4bx: (ARM only) Rewrite BX rn as MOV pc, rn for ARMv4
--fix-v4bx-interworking: (ARM only) Rewrite BX rn branch to ARMv4 interworking veneer
-g: Ignored
--gdb-index: Generate .gdb_index section
--no-gdb-index: Do not generate .gdb_index section
--gnu-unique: Enable STB_GNU_UNIQUE symbol binding (default)
--no-gnu-unique: Disable STB_GNU_UNIQUE symbol binding
-h FILENAME, -soname FILENAME: Set shared library name
--hash-bucket-empty-fraction FRACTION: Min fraction of empty buckets in dynamic hash
--hash-style [sysv,gnu,both]: Dynamic hash style
-I PROGRAM, --dynamic-linker PROGRAM: Set dynamic linker path
--incremental: Do an incremental link if possible; otherwise, do a full link and prepare output for incremental linking
--no-incremental: Do a full link (default)
--incremental-full: Do a full link and prepare output for incremental linking
--incremental-update: Do an incremental link; exit if not possible
--incremental-base FILE: Set base file for incremental linking (default is output file)
--incremental-changed: Assume files changed
--incremental-unchanged: Assume files didn't change
--incremental-unknown: Use timestamps to check files (default)
--incremental-startup-unchanged: Assume startup files unchanged (files preceding this option)
--incremental-patch PERCENT Amount of extra space to allocate for patches
-init SYMBOL: Call SYMBOL at load-time
--just-symbols FILE: Read only symbol values from FILE
--map-whole-files: Map whole files to memory (default on 64-bit hosts)
--no-map-whole-files: Map relevant file parts to memory (default on 32-bit hosts)
--keep-files-mapped: Keep files mapped across passes (default)
--no-keep-files-mapped: Release mapped files after each pass
--ld-generated-unwind-info: Generate unwind information for PLT (default)
--no-ld-generated-unwind-info: Do not generate unwind information for PLT
-l LIBNAME, --library LIBNAME: Search for library LIBNAME
-L DIR, --library-path DIR: Add directory to search path
--text-reorder: Enable text section reordering for GCC section names (default)
--no-text-reorder: Disable text section reordering for GCC section names
-nostdlib: Only search directories specified on the command line.
--rosegment: Put read-only non-executable sections in their own segment
--rosegment-gap OFFSET: Set offset between executable and read-only segments
-m EMULATION: Set GNU linker emulation; obsolete
--mmap-output-file: Map the output file for writing (default).
--no-mmap-output-file: Do not map the output file for writing.
-M, --print-map: Write map file on standard output
-Map MAPFILENAME: Write map file
-n, --nmagic: Do not page align data
-N, --omagic: Do not page align data, do not make text readonly
--no-omagic: Page align data, make text readonly
--enable-new-dtags: Enable use of DT_RUNPATH and DT_FLAGS
--disable-new-dtags: Disable use of DT_RUNPATH and DT_FLAGS
--noinhibit-exec: Create an output file even if errors occur
--no-undefined: Report undefined symbols (even with --shared)
-o FILE, --output FILE: Set output file name
-O LEVEL, -optimize LEVEL: Optimize output file size
--oformat [binary]: Set output format
-p: (ARM only) Ignore for backward compatibility
-pie: Create a position independent executable
-no-pie: Do not create a position independent executable
--pic-executable: Create a position independent executable
--no-pic-executable: Do not create a position independent executable
-no-pipeline-knowledge: (ARM only) Ignore for backward compatibility
--plt-align [=P2ALIGN]: (PowerPC64 only) Align PLT call stubs to fit cache lines
--plt-static-chain: (PowerPC64 only) PLT call stubs should load r11
--no-plt-static-chain: (PowerPC64 only) PLT call stubs should not load r11
--plt-thread-safe: (PowerPC64 only) PLT call stubs with load-load barrier
--no-plt-thread-safe: (PowerPC64 only) PLT call stubs without barrier
--plugin PLUGIN: Load a plugin library
--plugin-opt OPTION: Pass an option to the plugin
--posix-fallocate: Use posix_fallocate to reserve space in the output file (default).
--no-posix-fallocate: Use fallocate or ftruncate to reserve space.
--preread-archive-symbols: Preread archive symbols when multi-threaded
--print-output-format: Print default output format
--print-symbol-counts FILENAME: Print symbols defined and used for each input
-Qy: Ignored for SVR4 compatibility
-q, --emit-relocs: Generate relocations in output
-r, -relocatable: Generate relocatable output
-i: Synonym for -r
--relax: Relax branches on certain targets
--retain-symbols-file FILE: keep only symbols listed in this file
-R DIR: Add DIR to runtime search path
-rpath DIR: Add DIR to runtime search path
--rpath-link DIR: Add DIR to link time shared library search path
--section-ordering-file FILENAME: Layout sections in the order specified.
--section-start SECTION=ADDRESS: Set address of section
--sort-common [={ascending,descending}]: Sort common symbols by alignment
--sort-section [none,name]: Sort sections by name. '--no-text-reorder' will override '--sort-section=name' for .text
--spare-dynamic-tags COUNT: Dynamic tag slots to reserve (default 5)
-s, --strip-all: Strip all symbols
-S, --strip-debug: Strip debugging information
--strip-debug-non-line: Emit only debug line number information
--strip-debug-gdb: Strip debug symbols that are unused by gdb (at least versions <= 7.4)
--strip-lto-sections: Strip LTO intermediate code sections
--stub-group-size SIZE: (ARM, PowerPC only) The maximum distance from instructions in a group of sections to their stubs. Negative values mean stubs are always after (PowerPC before) the group. 1 means use default size.
--no-keep-memory: Use less memory and more disk I/O (included only for compatibility with GNU ld)
-G, -shared: Generate shared library
-Bshareable: Generate shared library
--split-stack-adjust-size SIZE: Stack size when -fsplit-stack function calls non-split
-static: Do not link against shared libraries
--icf [none,all,safe]: Identical Code Folding. '--icf=safe' Folds ctors, dtors and functions whose pointers are definitely not taken.
--icf-iterations COUNT: Number of iterations of ICF (default 2)
--print-icf-sections: List folded identical sections on stderr
--no-print-icf-sections: Do not list folded identical sections
--keep-unique SYMBOL: Do not fold this symbol during ICF
--gc-sections: Remove unused sections
--no-gc-sections: Don't remove unused sections (default)
--print-gc-sections: List removed unused sections on stderr
--no-print-gc-sections: Do not list removed unused sections
--stats: Print resource usage statistics
--sysroot DIR: Set target system root directory
-t, --trace: Print the name of each input file
-T FILE, --script FILE: Read linker script
--threads: Run the linker multi-threaded
--no-threads: Do not run the linker multi-threaded
--thread-count COUNT: Number of threads to use
--thread-count-initial COUNT: Number of threads to use in initial pass
--thread-count-middle COUNT Number of threads to use in middle pass
--thread-count-final COUNT: Number of threads to use in final pass
-Tbss ADDRESS: Set the address of the bss segment
-Tdata ADDRESS: Set the address of the data segment
-Ttext ADDRESS: Set the address of the text segment
-Ttext-segment ADDRESS: Set the address of the text segment
-Trodata-segment ADDRESS: Set the address of the rodata segment
--toc-optimize: (PowerPC64 only) Optimize TOC code sequences
--no-toc-optimize: (PowerPC64 only) Don't optimize TOC code sequences
--toc-sort: (PowerPC64 only) Sort TOC and GOT sections
--no-toc-sort: (PowerPC64 only) Don't sort TOC and GOT sections
-u SYMBOL, --undefined SYMBOL: Create undefined reference to SYMBOL
--unresolved-symbols ignore-all,report-all,ignore-in-object-files,ignore-in-shared-libs: How to handle unresolved symbols
--verbose: Synonym for --debug=,files/
--version-script FILE: Read version script
--warn-common: Warn about duplicate common symbols
--no-warn-common: Do not warn about duplicate common symbols (default)
--warn-constructors: Ignored
--no-warn-constructors: Ignored
--warn-execstack: Warn if the stack is executable
--no-warn-execstack: Do not warn if the stack is executable (default)
--no-warn-mismatch: Don't warn about mismatched input files
--warn-multiple-gp: Ignored
--warn-search-mismatch: Warn when skipping an incompatible library
--no-warn-search-mismatch: Don't warn when skipping an incompatible library
--warn-shared-textrel: Warn if text segment is not shareable
--no-warn-shared-textrel: Do not warn if text segment is not shareable (default)
--warn-unresolved-symbols: Report unresolved symbols as warnings
--error-unresolved-symbols: Report unresolved symbols as errors
--no-wchar-size-warning: (ARM only) Do not warn about objects with incompatible wchar_t sizes
--whole-archive: Include all archive contents
--no-whole-archive: Include only needed archive contents
--wrap SYMBOL: Use wrapper functions for SYMBOL
-y SYMBOL, --trace-symbol SYMBOL: Trace references to symbol
--undefined-version: Allow unused version in script (default)
--no-undefined-version: Do not allow unused version in script
-Y PATH: Default search path for Solaris compatibility
-(, --start-group: Start a library search group
-), --end-group: End a library search group
--start-lib: Start a library
--end-lib: End a library
-fuse-ld: Ignored for GCC linker option compatibility
-z combreloc: Sort dynamic relocs
-z nocombreloc: Do not sort dynamic relocs
-z common-page-size=SIZE: Set common page size to SIZE
-z defs: Report undefined symbols (even with --shared)
-z execstack: Mark output as requiring executable stack
-z initfirst: Mark DSO to be initialized first at runtime
-z interpose: Mark object to interpose all DSOs but executable
-z lazy: Mark object for lazy runtime binding (default)
-z loadfltr: Mark object requiring immediate process
-z max-page-size=SIZE: Set maximum page size to SIZE
-z muldefs: Allow multiple definitions of symbols
-z nocopyreloc: Do not create copy relocs
-z nodefaultlib: Mark object not to use default search paths
-z nodelete: Mark DSO non-deletable at runtime
-z nodlopen: Mark DSO not available to dlopen
-z nodump: Mark DSO not available to dldump
-z noexecstack: Mark output as not requiring executable stack
-z now: Mark object for immediate function binding
-z origin: Mark DSO to indicate that needs immediate $ORIGIN processing at runtime
-z relro: Where possible mark variables read-only after relocation
-z norelro: Don't mark variables read-only after relocation
-z text: Do not permit relocations in read-only segments
-z notext: Permit relocations in read-only segments (default)
-z textoff: Permit relocations in read-only segments (default)
-z buildd: Dummy z option

ld.gold: supported targets: elf32-i386 elf32-i386-freebsd elf32-i386-nacl elf32-x86-64 elf32-x86-64-freebsd elf32-x86-64-nacl elf64-x86-64 elf64-x86-64-freebsd elf64-x86-64-nacl ld.gold: supported emulations: elf_i386 elf_i386_nacl elf32_x86_64 elf32_x86_64_nacl elf_x86_64 elf_x86_64_nacl

REPORTING BUGS

Report bugs to <http://www.sourceware.org/bugzilla/>

COPYRIGHT

Copyright © 2014 Free Software Foundation, Inc. This program is free software; you may redistribute it under the terms of the GNU General Public License version 3 or (at your option) a later version. This program has absolutely no warranty.