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diff --git a/ld/ld.1 b/ld/ld.1 deleted file mode 100644 index 58516b979b2..00000000000 --- a/ld/ld.1 +++ /dev/null @@ -1,1115 +0,0 @@ -.\" Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 98, 1999 Free Software Foundation -.\" See section COPYING for conditions for redistribution -.TH ld 1 "17 August 1992" "cygnus support" "GNU Development Tools" -.de BP -.sp -.ti \-.2i -\(** -.. - -.SH NAME -ld \- the GNU linker - -.SH SYNOPSIS -.hy 0 -.na -.TP -.B ld -.RB "[\|" \-o " -.I output\c -\&\|] \c -.I objfile\c -\&.\|.\|. -.br -.RB "[\|" \-A\c -.I architecture\c -\&\|] -.RB "[\|" "\-b\ "\c -.I input-format\c -\&\|] -.RB "[\|" \-Bstatic "\|]" -.RB "[\|" \-Bdynamic "\|]" -.RB "[\|" \-Bsymbolic "\|]" -.RB "[\|" "\-c\ "\c -.I commandfile\c -\&\|] -.RB "[\|" \-\-cref "\|]" -.RB "[\|" \-d | \-dc | \-dp\c -\|] -.br -.RB "[\|" "\-defsym\ "\c -.I symbol\c -\& = \c -.I expression\c -\&\|] -.RB "[\|" \-\-demangle "\|]" -.RB "[\|" \-\-no\-demangle "\|]" -.RB "[\|" "\-e\ "\c -.I entry\c -\&\|] -.RB "[\|" \-embedded\-relocs "\|]" -.RB "[\|" \-E "\|]" -.RB "[\|" \-export\-dynamic "\|]" -.RB "[\|" "\-f\ "\c -.I name\c -\&\|] -.RB "[\|" "\-\-auxiliary\ "\c -.I name\c -\&\|] -.RB "[\|" "\-F\ "\c -.I name\c -\&\|] -.RB "[\|" "\-\-filter\ "\c -.I name\c -\&\|] -.RB "[\|" "\-format\ "\c -.I input-format\c -\&\|] -.RB "[\|" \-g "\|]" -.RB "[\|" \-G -.I size\c -\&\|] -.RB "[\|" "\-h\ "\c -.I name\c -\&\|] -.RB "[\|" "\-soname\ "\c -.I name\c -\&\|] -.RB "[\|" \-\-help "\|]" -.RB "[\|" \-i "\|]" -.RB "[\|" \-l\c -.I ar\c -\&\|] -.RB "[\|" \-L\c -.I searchdir\c -\&\|] -.RB "[\|" \-M "\|]" -.RB "[\|" \-Map -.I mapfile\c -\&\|] -.RB "[\|" \-m -.I emulation\c -\&\|] -.RB "[\|" \-n | \-N "\|]" -.RB "[\|" \-noinhibit-exec "\|]" -.RB "[\|" \-no\-keep\-memory "\|]" -.RB "[\|" \-no\-warn\-mismatch "\|]" -.RB "[\|" \-O\c -.I level\c -\&\|] -.RB "[\|" "\-oformat\ "\c -.I output-format\c -\&\|] -.RB "[\|" "\-R\ "\c -.I filename\c -\&\|] -.RB "[\|" \-relax "\|]" -.RB "[\|" \-r | \-Ur "\|]" -.RB "[\|" "\-rpath\ "\c -.I directory\c -\&\|] -.RB "[\|" "\-rpath\-link\ "\c -.I directory\c -\&\|] -.RB "[\|" \-S "\|]" -.RB "[\|" \-s "\|]" -.RB "[\|" \-shared "\|]" -.RB "[\|" \-sort\-common "\|]" -.RB "[\|" "\-split\-by\-reloc\ "\c -.I count\c -\&\|] -.RB "[\|" \-split\-by\-file "\|]" -.RB "[\|" "\-T\ "\c -.I commandfile\c -\&\|] -.RB "[\|" "\-Ttext\ "\c -.I textorg\c -\&\|] -.RB "[\|" "\-Tdata\ "\c -.I dataorg\c -\&\|] -.RB "[\|" "\-Tbss\ "\c -.I bssorg\c -\&\|] -.RB "[\|" \-t "\|]" -.RB "[\|" "\-u\ "\c -.I sym\c -\&] -.RB "[\|" \-V "\|]" -.RB "[\|" \-v "\|]" -.RB "[\|" \-\-verbose "\|]" -.RB "[\|" \-\-version "\|]" -.RB "[\|" \-warn\-common "\|]" -.RB "[\|" \-warn\-constructors "\|]" -.RB "[\|" \-warn\-multiple\-gp "\|]" -.RB "[\|" \-warn\-once "\|]" -.RB "[\|" \-warn\-section\-align "\|]" -.RB "[\|" \-\-whole\-archive "\|]" -.RB "[\|" \-\-no\-whole\-archive "\|]" -.RB "[\|" "\-\-wrap\ "\c -.I symbol\c -\&\|] -.RB "[\|" \-X "\|]" -.RB "[\|" \-x "\|]" -.ad b -.hy 1 -.SH DESCRIPTION -\c -.B ld\c -\& combines a number of object and archive files, relocates -their data and ties up symbol references. Often the last step in -building a new compiled program to run is a call to \c -.B ld\c -\&. - -\c -.B ld\c -\& accepts Linker Command Language files -to provide explicit and total control over the linking process. -This man page does not describe the command language; see the `\|\c -.B ld\c -\|' entry in `\|\c -.B info\c -\|', or the manual -.I -ld: the GNU linker -\&, for full details on the command language and on other aspects of -the GNU linker. - -This version of \c -.B ld\c -\& uses the general purpose BFD libraries -to operate on object files. This allows \c -.B ld\c -\& to read, combine, and -write object files in many different formats\(em\&for example, COFF or -\c -.B a.out\c -\&. Different formats may be linked together to produce any -available kind of object file. You can use `\|\c -.B objdump \-i\c -\|' to get a list of formats supported on various architectures; see -.BR objdump ( 1 ). - -Aside from its flexibility, the GNU linker is more helpful than other -linkers in providing diagnostic information. Many linkers abandon -execution immediately upon encountering an error; whenever possible, -\c -.B ld\c -\& continues executing, allowing you to identify other errors -(or, in some cases, to get an output file in spite of the error). - -The GNU linker \c -.B ld\c -\& is meant to cover a broad range of situations, -and to be as compatible as possible with other linkers. As a result, -you have many choices to control its behavior through the command line, -and through environment variables. - -.SH OPTIONS -The plethora of command-line options may seem intimidating, but in -actual practice few of them are used in any particular context. -For instance, a frequent use of \c -.B ld\c -\& is to link standard Unix -object files on a standard, supported Unix system. On such a system, to -link a file \c -.B hello.o\c -\&: -.sp -.br -$\ ld\ \-o\ output\ /lib/crt0.o\ hello.o\ \-lc -.br -.sp -This tells \c -.B ld\c -\& to produce a file called \c -.B output\c -\& as the -result of linking the file \c -.B /lib/crt0.o\c -\& with \c -.B hello.o\c -\& and -the library \c -.B libc.a\c -\& which will come from the standard search -directories. - -The command-line options to \c -.B ld\c -\& may be specified in any order, and -may be repeated at will. For the most part, repeating an option with a -different argument will either have no further effect, or override prior -occurrences (those further to the left on the command line) of an -option. - -The exceptions\(em\&which may meaningfully be used more than once\(em\&are -\c -.B \-A\c -\&, \c -.B \-b\c -\& (or its synonym \c -.B \-format\c -\&), \c -.B \-defsym\c -\&, -\c -.B \-L\c -\&, \c -.B \-l\c -\&, \c -.B \-R\c -\&, and \c -.B \-u\c -\&. - -The list of object files to be linked together, shown as \c -.I objfile\c -\&, -may follow, precede, or be mixed in with command-line options; save that -an \c -.I objfile\c -\& argument may not be placed between an option flag and -its argument. - -Usually the linker is invoked with at least one object file, but other -forms of binary input files can also be specified with \c -.B \-l\c -\&, -\c -.B \-R\c -\&, and the script command language. If \c -.I no\c -\& binary input -files at all are specified, the linker does not produce any output, and -issues the message `\|\c -.B No input files\c -\|'. - -Option arguments must either follow the option letter without intervening -whitespace, or be given as separate arguments immediately following the -option that requires them. - -.TP -.BI "-A" "architecture" -In the current release of \c -.B ld\c -\&, this option is useful only for the -Intel 960 family of architectures. In that \c -.B ld\c -\& configuration, the -\c -.I architecture\c -\& argument is one of the two-letter names identifying -members of the 960 family; the option specifies the desired output -target, and warns of any incompatible instructions in the input files. -It also modifies the linker's search strategy for archive libraries, to -support the use of libraries specific to each particular -architecture, by including in the search loop names suffixed with the -string identifying the architecture. - -For example, if your \c -.B ld\c -\& command line included `\|\c -.B \-ACA\c -\|' as -well as `\|\c -.B \-ltry\c -\|', the linker would look (in its built-in search -paths, and in any paths you specify with \c -.B \-L\c -\&) for a library with -the names -.sp -.br -try -.br -libtry.a -.br -tryca -.br -libtryca.a -.br -.sp - -The first two possibilities would be considered in any event; the last -two are due to the use of `\|\c -.B \-ACA\c -\|'. - -Future releases of \c -.B ld\c -\& may support similar functionality for -other architecture families. - -You can meaningfully use \c -.B \-A\c -\& more than once on a command line, if -an architecture family allows combination of target architectures; each -use will add another pair of name variants to search for when \c -.B \-l -specifies a library. - -.TP -.BI "\-b " "input-format" -Specify the binary format for input object files that follow this option -on the command line. You don't usually need to specify this, as -\c -.B ld\c -\& is configured to expect as a default input format the most -usual format on each machine. \c -.I input-format\c -\& is a text string, the -name of a particular format supported by the BFD libraries. -\c -.B \-format \c -.I input-format\c -\&\c -\& has the same effect, as does the script command -.BR TARGET . - -You may want to use this option if you are linking files with an unusual -binary format. You can also use \c -.B \-b\c -\& to switch formats explicitly (when -linking object files of different formats), by including -\c -.B \-b \c -.I input-format\c -\&\c -\& before each group of object files in a -particular format. - -The default format is taken from the environment variable -.B GNUTARGET\c -\&. You can also define the input -format from a script, using the command \c -.B TARGET\c -\&. - -.TP -.B \-Bstatic -Do not link against shared libraries. This is only meaningful on -platforms for which shared libraries are supported. - -.TP -.B \-Bdynamic -Link against dynamic libraries. This is only meaningful on platforms -for which shared libraries are supported. This option is normally the -default on such platforms. - -.TP -.B \-Bsymbolic -When creating a shared library, bind references to global symbols to -the definition within the shared library, if any. Normally, it is -possible for a program linked against a shared library to override the -definition within the shared library. This option is only meaningful -on ELF platforms which support shared libraries. - -.TP -.BI "\-c " "commandfile" -Directs \c -.B ld\c -\& to read link commands from the file -\c -.I commandfile\c -\&. These commands will completely override \c -.B ld\c -\&'s -default link format (rather than adding to it); \c -.I commandfile\c -\& must -specify everything necessary to describe the target format. - - -You may also include a script of link commands directly in the command -line by bracketing it between `\|\c -.B {\c -\|' and `\|\c -.B }\c -\|' characters. - -.TP -.B \-\-cref -Output a cross reference table. If a linker map file is being -generated, the cross reference table is printed to the map file. -Otherwise, it is printed on the standard output. - -.TP -.B \-d -.TP -.B \-dc -.TP -.B \-dp -These three options are equivalent; multiple forms are supported for -compatibility with other linkers. Use any of them to make \c -.B ld -assign space to common symbols even if a relocatable output file is -specified (\c -.B \-r\c -\&). The script command -\c -.B FORCE_COMMON_ALLOCATION\c -\& has the same effect. - -.TP -.BI "-defsym " "symbol" "\fR = \fP" expression -Create a global symbol in the output file, containing the absolute -address given by \c -.I expression\c -\&. You may use this option as many -times as necessary to define multiple symbols in the command line. A -limited form of arithmetic is supported for the \c -.I expression\c -\& in this -context: you may give a hexadecimal constant or the name of an existing -symbol, or use \c -.B +\c -\& and \c -.B \-\c -\& to add or subtract hexadecimal -constants or symbols. If you need more elaborate expressions, consider -using the linker command language from a script. - -.TP -.B \-\-demangle -.TP -.B \-\-no\-demangle -These options control whether to demangle symbol names in error -messages and other output. When the linker is told to demangle, it -tries to present symbol names in a readable fashion: it strips leading -underscores if they are used by the object file format, and converts -C++ mangled symbol names into user readable names. The linker will -demangle by default unless the environment variable -.B COLLECT_NO_DEMANGLE -is set. These options may be used to override the default. - -.TP -.BI "-e " "entry"\c -\& -Use \c -.I entry\c -\& as the explicit symbol for beginning execution of your -program, rather than the default entry point. See the `\|\c -.B ld\c -\|' entry in `\|\c -.B info\c -\|' for a -discussion of defaults and other ways of specifying the -entry point. - -.TP -.B \-embedded\-relocs -This option is only meaningful when linking MIPS embedded PIC code, -generated by the -.B \-membedded\-pic -option to the GNU compiler and assembler. It causes the linker to -create a table which may be used at runtime to relocate any data which -was statically initialized to pointer values. See the code in -testsuite/ld-empic for details. - -.TP -.B \-E -.TP -.B \-export\-dynamic -When creating an ELF file, add all symbols to the dynamic symbol table. -Normally, the dynamic symbol table contains only symbols which are used -by a dynamic object. This option is needed for some uses of -.I dlopen. - -.TP -.BI "-f " "name" -.TP -.BI "--auxiliary " "name" -When creating an ELF shared object, set the internal DT_AUXILIARY field -to the specified name. This tells the dynamic linker that the symbol -table of the shared object should be used as an auxiliary filter on the -symbol table of the shared object -.I name. - -.TP -.BI "-F " "name" -.TP -.BI "--filter " "name" -When creating an ELF shared object, set the internal DT_FILTER field to -the specified name. This tells the dynamic linker that the symbol table -of the shared object should be used as a filter on the symbol table of -the shared object -.I name. - -.TP -.BI "\-format " "input\-format" -Synonym for \c -.B \-b\c -\& \c -.I input\-format\c -\&. - -.TP -.B \-g -Accepted, but ignored; provided for compatibility with other tools. - -.TP -.BI "\-G " "size"\c -Set the maximum size of objects to be optimized using the GP register -to -.I size -under MIPS ECOFF. Ignored for other object file formats. - -.TP -.BI "-h " "name" -.TP -.BI "-soname " "name" -When creating an ELF shared object, set the internal DT_SONAME field to -the specified name. When an executable is linked with a shared object -which has a DT_SONAME field, then when the executable is run the dynamic -linker will attempt to load the shared object specified by the DT_SONAME -field rather than the using the file name given to the linker. - -.TP -.B \-\-help -Print a summary of the command-line options on the standard output and exit. -This option and -.B \-\-version -begin with two dashes instead of one -for compatibility with other GNU programs. The other options start with -only one dash for compatibility with other linkers. - -.TP -.B \-i -Perform an incremental link (same as option \c -.B \-r\c -\&). - -.TP -.BI "\-l" "ar"\c -\& -Add an archive file \c -.I ar\c -\& to the list of files to link. This -option may be used any number of times. \c -.B ld\c -\& will search its -path-list for occurrences of \c -.B lib\c -.I ar\c -\&.a\c -\& for every \c -.I ar -specified. - -.TP -.BI "\-L" "searchdir" -This command adds path \c -.I searchdir\c -\& to the list of paths that -\c -.B ld\c -\& will search for archive libraries. You may use this option -any number of times. - -The default set of paths searched (without being specified with -\c -.B \-L\c -\&) depends on what emulation mode \c -.B ld\c -\& is using, and in -some cases also on how it was configured. The -paths can also be specified in a link script with the \c -.B SEARCH_DIR -command. - -.TP -.B \-M -Print (to the standard output file) a link map\(em\&diagnostic information -about where symbols are mapped by \c -.B ld\c -\&, and information on global -common storage allocation. - -.TP -.BI "\-Map " "mapfile"\c -Print to the file -.I mapfile -a link map\(em\&diagnostic information -about where symbols are mapped by \c -.B ld\c -\&, and information on global -common storage allocation. - -.TP -.BI "\-m " "emulation"\c -Emulate the -.I emulation -linker. You can list the available emulations with the -.I \-\-verbose -or -.I \-V -options. This option overrides the compiled-in default, which is the -system for which you configured -.BR ld . - -.TP -.B \-N -specifies readable and writable \c -.B text\c -\& and \c -.B data\c -\& sections. If -the output format supports Unix style magic numbers, the output is -marked as \c -.B OMAGIC\c -\&. - -When you use the `\|\c -.B \-N\c -\&\|' option, the linker does not page-align the -data segment. - -.TP -.B \-n -sets the text segment to be read only, and \c -.B NMAGIC\c -\& is written -if possible. - -.TP -.B \-noinhibit\-exec -Normally, the linker will not produce an output file if it encounters -errors during the link process. With this flag, you can specify that -you wish the output file retained even after non-fatal errors. - -.TP -.B \-no\-keep\-memory -The linker normally optimizes for speed over memory usage by caching -the symbol tables of input files in memory. This option tells the -linker to instead optimize for memory usage, by rereading the symbol -tables as necessary. This may be required if the linker runs out of -memory space while linking a large executable. - -.TP -.B \-no\-warn\-mismatch -Normally the linker will give an error if you try to link together -input files that are mismatched for some reason, perhaps because they -have been compiled for different processors or for different -endiannesses. This option tells the linker that it should silently -permit such possible errors. This option should only be used with -care, in cases when you have taken some special action that ensures -that the linker errors are inappropriate. - -.TP -.BI "\-o " "output" -.I output\c -\& is a name for the program produced by \c -.B ld\c -\&; if this -option is not specified, the name `\|\c -.B a.out\c -\|' is used by default. The -script command \c -.B OUTPUT\c -\& can also specify the output file name. - -.TP -.BI "\-O" "level" -Generate optimized output files. This might use significantly more -time and therefore probably should be enabled only for generating the -final binary. -\c -.I level\c -\& is supposed to be a numeric value. Any value greater than zero enables -the optimizations. - -.TP -.BI "\-oformat " "output\-format" -Specify the binary format for the output object file. -You don't usually need to specify this, as -\c -.B ld\c -\& is configured to produce as a default output format the most -usual format on each machine. \c -.I output-format\c -\& is a text string, the -name of a particular format supported by the BFD libraries. -The script command -.B OUTPUT_FORMAT -can also specify the output format, but this option overrides it. - -.TP -.BI "\-R " "filename" -Read symbol names and their addresses from \c -.I filename\c -\&, but do not -relocate it or include it in the output. This allows your output file -to refer symbolically to absolute locations of memory defined in other -programs. - -.TP -.B \-relax -An option with machine dependent effects. Currently this option is only -supported on the H8/300. - -On some platforms, use this option to perform global optimizations that -become possible when the linker resolves addressing in your program, such -as relaxing address modes and synthesizing new instructions in the -output object file. - -On platforms where this is not supported, `\|\c -.B \-relax\c -\&\|' is accepted, but has no effect. - -.TP -.B \-r -Generates relocatable output\(em\&i.e., generate an output file that can in -turn serve as input to \c -.B ld\c -\&. This is often called \c -.I partial -linking\c -\&. As a side effect, in environments that support standard Unix -magic numbers, this option also sets the output file's magic number to -\c -.B OMAGIC\c -\&. -If this option is not specified, an absolute file is produced. When -linking C++ programs, this option \c -.I will not\c -\& resolve references to -constructors; \c -.B \-Ur\c -\& is an alternative. - -This option does the same as \c -.B \-i\c -\&. - -.TP -.B \-rpath\ \fIdirectory -Add a directory to the runtime library search path. This is used when -linking an ELF executable with shared objects. All -.B \-rpath -arguments are concatenated and passed to the runtime linker, which uses -them to locate shared objects at runtime. The -.B \-rpath -option is also used when locating shared objects which are needed by -shared objects explicitly included in the link; see the description of -the -.B \-rpath\-link -option. If -.B \-rpath -is not used when linking an ELF executable, the contents of the -environment variable -.B LD_RUN_PATH -will be used if it is defined. - -The -.B \-rpath -option may also be used on SunOS. By default, on SunOS, the linker -will form a runtime search path out of all the -.B \-L -options it is given. If a -.B \-rpath -option is used, the runtime search path will be formed exclusively -using the -.B \-rpath -options, ignoring -the -.B \-L -options. This can be useful when using gcc, which adds many -.B \-L -options which may be on NFS mounted filesystems. - -.TP -.B \-rpath\-link\ \fIdirectory -When using ELF or SunOS, one shared library may require another. This -happens when an -.B ld\ \-shared -link includes a shared library as one of the input files. - -When the linker encounters such a dependency when doing a non-shared, -non-relocateable link, it will automatically try to locate the required -shared library and include it in the link, if it is not included -explicitly. In such a case, the -.B \-rpath\-link -option specifies the first set of directories to search. The -.B \-rpath\-link -option may specify a sequence of directory names either by specifying -a list of names separated by colons, or by appearing multiple times. - -If the required shared library is not found, the linker will issue a -warning and continue with the link. - -.TP -.B \-S -Omits debugger symbol information (but not all symbols) from the output file. - -.TP -.B \-s -Omits all symbol information from the output file. - -.TP -.B \-shared -Create a shared library. This is currently only supported on ELF and -SunOS platforms (on SunOS it is not required, as the linker will -automatically create a shared library when there are undefined symbols -and the -.B \-e -option is not used). - -.TP -.B \-sort\-common -Normally, when -.B ld -places the global common symbols in the appropriate output sections, -it sorts them by size. First come all the one byte symbols, then all -the two bytes, then all the four bytes, and then everything else. -This is to prevent gaps between symbols due to -alignment constraints. This option disables that sorting. - -.TP -.B \-split\-by\-reloc\ \fIcount -Trys to creates extra sections in the output file so that no single -output section in the file contains more than -.I count -relocations. -This is useful when generating huge relocatable for downloading into -certain real time kernels with the COFF object file format; since COFF -cannot represent more than 65535 relocations in a single section. -Note that this will fail to work with object file formats which do not -support arbitrary sections. The linker will not split up individual -input sections for redistribution, so if a single input section -contains more than -.I count -relocations one output section will contain that many relocations. - -.TP -.B \-split\-by\-file -Similar to -.B \-split\-by\-reloc -but creates a new output section for each input file. - -.TP -.BI "\-Tbss " "org"\c -.TP -.BI "\-Tdata " "org"\c -.TP -.BI "\-Ttext " "org"\c -Use \c -.I org\c -\& as the starting address for\(em\&respectively\(em\&the -\c -.B bss\c -\&, \c -.B data\c -\&, or the \c -.B text\c -\& segment of the output file. -\c -.I org\c -\& must be a hexadecimal integer. - -.TP -.BI "\-T " "commandfile" -Equivalent to \c -.B \-c \c -.I commandfile\c -\&\c -\&; supported for compatibility with -other tools. - -.TP -.B \-t -Prints names of input files as \c -.B ld\c -\& processes them. - -.TP -.BI "\-u " "sym" -Forces \c -.I sym\c -\& to be entered in the output file as an undefined symbol. -This may, for example, trigger linking of additional modules from -standard libraries. \c -.B \-u\c -\& may be repeated with different option -arguments to enter additional undefined symbols. - -.TP -.B \-Ur -For anything other than C++ programs, this option is equivalent to -\c -.B \-r\c -\&: it generates relocatable output\(em\&i.e., an output file that can in -turn serve as input to \c -.B ld\c -\&. When linking C++ programs, \c -.B \-Ur -.I will\c -\& resolve references to constructors, unlike \c -.B \-r\c -\&. - -.TP -.B \-\-verbose -Display the version number for \c -.B ld -and list the supported emulations. -Display which input files can and can not be opened. - -.TP -.B \-v, \-V -Display the version number for \c -.B ld\c -\&. -The -.B \-V -option also lists the supported emulations. - -.TP -.B \-\-version -Display the version number for \c -.B ld -and exit. - -.TP -.B \-warn\-common -Warn when a common symbol is combined with another common symbol or with -a symbol definition. Unix linkers allow this somewhat sloppy practice, -but linkers on some other operating systems do not. This option allows -you to find potential problems from combining global symbols. - -.TP -.B \-warn\-constructors -Warn if any global constructors are used. This is only useful for a -few object file formats. For formats like COFF or ELF, the linker can -not detect the use of global constructors. - -.TP -.B \-warn\-multiple\-gp -Warn if the output file requires multiple global-pointer values. This -option is only meaningful for certain processors, such as the Alpha. - -.TP -.B \-warn\-once -Only warn once for each undefined symbol, rather than once per module -which refers to it. - -.TP -.B \-warn\-section\-align -Warn if the address of an output section is changed because of -alignment. Typically, the alignment will be set by an input section. -The address will only be changed if it not explicitly specified; that -is, if the SECTIONS command does not specify a start address for the -section. - -.TP -.B \-\-whole\-archive -For each archive mentioned on the command line after the -.B \-\-whole\-archive -option, include every object file in the archive in the link, rather -than searching the archive for the required object files. This is -normally used to turn an archive file into a shared library, forcing -every object to be included in the resulting shared library. - -.TP -.B \-\-no\-whole\-archive -Turn off the effect of the -.B \-\-whole\-archive -option for archives which appear later on the command line. - -.TP -.BI "--wrap " "symbol" -Use a wrapper function for -.I symbol. -Any undefined reference to -.I symbol -will be resolved to -.BI "__wrap_" "symbol". -Any undefined reference to -.BI "__real_" "symbol" -will be resolved to -.I symbol. - -.TP -.B \-X -Delete all temporary local symbols. For most targets, this is all local -symbols whose names begin with `\|\c -.B L\c -\|'. - -.TP -.B \-x -Delete all local symbols. - -.PP - -.SH ENVIRONMENT -\c -You can change the behavior of -.B ld\c -\& with the environment variable \c -.B GNUTARGET\c -\&. - -\c -.B GNUTARGET\c -\& determines the input-file object format if you don't -use \c -.B \-b\c -\& (or its synonym \c -.B \-format\c -\&). Its value should be one -of the BFD names for an input format. If there is no -\c -.B GNUTARGET\c -\& in the environment, \c -.B ld\c -\& uses the natural format -of the host. If \c -.B GNUTARGET\c -\& is set to \c -.B default\c -\& then BFD attempts to discover the -input format by examining binary input files; this method often -succeeds, but there are potential ambiguities, since there is no method -of ensuring that the magic number used to flag object-file formats is -unique. However, the configuration procedure for BFD on each system -places the conventional format for that system first in the search-list, -so ambiguities are resolved in favor of convention. - -.PP - -.SH "SEE ALSO" - -.BR objdump ( 1 ) -.br -.br -.RB "`\|" ld "\|' and `\|" binutils "\|'" -entries in -.B info\c -.br -.I -ld: the GNU linker\c -, Steve Chamberlain and Roland Pesch; -.I -The GNU Binary Utilities\c -, Roland H. Pesch. - -.SH COPYING -Copyright (c) 1991, 92, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. -.PP -Permission is granted to make and distribute verbatim copies of -this manual provided the copyright notice and this permission notice -are preserved on all copies. -.PP -Permission is granted to copy and distribute modified versions of this -manual under the conditions for verbatim copying, provided that the -entire resulting derived work is distributed under the terms of a -permission notice identical to this one. -.PP -Permission is granted to copy and distribute translations of this -manual into another language, under the above conditions for modified -versions, except that this permission notice may be included in -translations approved by the Free Software Foundation instead of in -the original English. |