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    Command:

    dlltool

    
    
    

    SYNOPSIS

           dlltool [-d|--input-def def-file-name]
                   [-b|--base-file base-file-name]
                   [-e|--output-exp exports-file-name]
                   [-z|--output-def def-file-name]
                   [-l|--output-lib library-file-name]
                   [-y|--output-delaylib library-file-name]
                   [--export-all-symbols] [--no-export-all-symbols]
                   [--exclude-symbols list]
                   [--no-default-excludes]
                   [-S|--as path-to-assembler] [-f|--as-flags options]
                   [-D|--dllname name] [-m|--machine machine]
                   [-a|--add-indirect]
                   [-U|--add-underscore] [--add-stdcall-underscore]
                   [-k|--kill-at] [-A|--add-stdcall-alias]
                   [-p|--ext-prefix-alias prefix]
                   [-x|--no-idata4] [-c|--no-idata5]
                   [--use-nul-prefixed-import-tables]
                   [-I|--identify library-file-name] [--identify-strict]
                   [-i|--interwork]
                   [-n|--nodelete] [-t|--temp-prefix prefix]
                   [-v|--verbose]
                   [-h|--help] [-V|--version]
                   [--no-leading-underscore] [--leading-underscore]
                   [object-file ...]
    
    
    

    DESCRIPTION

           dlltool reads its inputs, which can come from the -d and -b options as
           well as object files specified on the command line.  It then processes
           these inputs and if the -e option has been specified it creates a
           exports file.  If the -l option has been specified it creates a library
           file and if the -z option has been specified it creates a def file.
           Any or all of the -e, -l and -z options can be present in one
           invocation of dlltool.
    
           When creating a DLL, along with the source for the DLL, it is necessary
           to have three other files.  dlltool can help with the creation of these
           files.
    
           The first file is a .def file which specifies which functions are
           exported from the DLL, which functions the DLL imports, and so on.
           This is a text file and can be created by hand, or dlltool can be used
           to create it using the -z option.  In this case dlltool will scan the
           object files specified on its command line looking for those functions
           which have been specially marked as being exported and put entries for
           them in the .def file it creates.
    
           In order to mark a function as being exported from a DLL, it needs to
           have an -export:<name_of_function> entry in the .drectve section of the
           object file.  This can be done in C by using the asm() operator:
    
                     asm (".section .drectve");
    
           If the -y option is specified, dlltool generates a delay-import library
           that can be used instead of the normal import library to allow a
           program to link to the dll only as soon as an imported function is
           called for the first time. The resulting executable will need to be
           linked to the static delayimp library containing __delayLoadHelper2(),
           which in turn will import LoadLibraryA and GetProcAddress from
           kernel32.
    
           dlltool builds the library file by hand, but it builds the exports file
           by creating temporary files containing assembler statements and then
           assembling these.  The -S command line option can be used to specify
           the path to the assembler that dlltool will use, and the -f option can
           be used to pass specific flags to that assembler.  The -n can be used
           to prevent dlltool from deleting these temporary assembler files when
           it is done, and if -n is specified twice then this will prevent dlltool
           from deleting the temporary object files it used to build the library.
    
           Here is an example of creating a DLL from a source file dll.c and also
           creating a program (from an object file called program.o) that uses
           that DLL:
    
                     gcc -c dll.c
                     dlltool -e exports.o -l dll.lib dll.o
                     gcc dll.o exports.o -o dll.dll
                     gcc program.o dll.lib -o program
    
           dlltool may also be used to query an existing import library to
           determine the name of the DLL to which it is associated.  See the
           description of the -I or --identify option.
    
    
    

    OPTIONS

           The command line options have the following meanings:
    
           -d filename
           --input-def filename
               Specifies the name of a .def file to be read in and processed.
    
           -b filename
           --base-file filename
               Specifies the name of a base file to be read in and processed.  The
               contents of this file will be added to the relocation section in
               the exports file generated by dlltool.
    
           -e filename
           --output-exp filename
               Specifies the name of the export file to be created by dlltool.
    
           -z filename
           --output-def filename
               Specifies the name of the .def file to be created by dlltool.
    
               the --exclude-symbols option.
    
           --no-export-all-symbols
               Only export symbols explicitly listed in an input .def file or in
               .drectve sections in the input object files.  This is the default
               behaviour.  The .drectve sections are created by dllexport
               attributes in the source code.
    
           --exclude-symbols list
               Do not export the symbols in list.  This is a list of symbol names
               separated by comma or colon characters.  The symbol names should
               not contain a leading underscore.  This is only meaningful when
               --export-all-symbols is used.
    
           --no-default-excludes
               When --export-all-symbols is used, it will by default avoid
               exporting certain special symbols.  The current list of symbols to
               avoid exporting is DllMain@12, DllEntryPoint@0, impure_ptr.  You
               may use the --no-default-excludes option to go ahead and export
               these special symbols.  This is only meaningful when
               --export-all-symbols is used.
    
           -S path
           --as path
               Specifies the path, including the filename, of the assembler to be
               used to create the exports file.
    
           -f options
           --as-flags options
               Specifies any specific command line options to be passed to the
               assembler when building the exports file.  This option will work
               even if the -S option is not used.  This option only takes one
               argument, and if it occurs more than once on the command line, then
               later occurrences will override earlier occurrences.  So if it is
               necessary to pass multiple options to the assembler they should be
               enclosed in double quotes.
    
           -D name
           --dll-name name
               Specifies the name to be stored in the .def file as the name of the
               DLL when the -e option is used.  If this option is not present,
               then the filename given to the -e option will be used as the name
               of the DLL.
    
           -m machine
           -machine machine
               Specifies the type of machine for which the library file should be
               built.  dlltool has a built in default type, depending upon how it
               was created, but this option can be used to override that.  This is
               normally only useful when creating DLLs for an ARM processor, when
               the contents of the DLL are actually encode using Thumb
               instructions.
               Specifies whether standard symbol should be forced to be prefixed,
               or not.
    
           --add-stdcall-underscore
               Specifies that when dlltool is creating the exports file it should
               prepend an underscore to the names of exported stdcall functions.
               Variable names and non-stdcall function names are not modified.
               This option is useful when creating GNU-compatible import libs for
               third party DLLs that were built with MS-Windows tools.
    
           -k
           --kill-at
               Specifies that when dlltool is creating the exports file it should
               not append the string @ <number>.  These numbers are called ordinal
               numbers and they represent another way of accessing the function in
               a DLL, other than by name.
    
           -A
           --add-stdcall-alias
               Specifies that when dlltool is creating the exports file it should
               add aliases for stdcall symbols without @ <number> in addition to
               the symbols with @ <number>.
    
           -p
           --ext-prefix-alias prefix
               Causes dlltool to create external aliases for all DLL imports with
               the specified prefix.  The aliases are created for both external
               and import symbols with no leading underscore.
    
           -x
           --no-idata4
               Specifies that when dlltool is creating the exports and library
               files it should omit the ".idata4" section.  This is for
               compatibility with certain operating systems.
    
           --use-nul-prefixed-import-tables
               Specifies that when dlltool is creating the exports and library
               files it should prefix the ".idata4" and ".idata5" by zero an
               element. This emulates old gnu import library generation of
               "dlltool". By default this option is turned off.
    
           -c
           --no-idata5
               Specifies that when dlltool is creating the exports and library
               files it should omit the ".idata5" section.  This is for
               compatibility with certain operating systems.
    
           -I filename
           --identify filename
               Specifies that dlltool should inspect the import library indicated
               by filename and report, on "stdout", the name(s) of the associated
               DLL(s).  This can be performed in addition to any other operations
    
           -n
           --nodelete
               Makes dlltool preserve the temporary assembler files it used to
               create the exports file.  If this option is repeated then dlltool
               will also preserve the temporary object files it uses to create the
               library file.
    
           -t prefix
           --temp-prefix prefix
               Makes dlltool use prefix when constructing the names of temporary
               assembler and object files.  By default, the temp file prefix is
               generated from the pid.
    
           -v
           --verbose
               Make dlltool describe what it is doing.
    
           -h
           --help
               Displays a list of command line options and then exits.
    
           -V
           --version
               Displays dlltool's version number and then exits.
    
           @file
               Read command-line options from file.  The options read are inserted
               in place of the original @file option.  If file does not exist, or
               cannot be read, then the option will be treated literally, and not
               removed.
    
               Options in file are separated by whitespace.  A whitespace
               character may be included in an option by surrounding the entire
               option in either single or double quotes.  Any character (including
               a backslash) may be included by prefixing the character to be
               included with a backslash.  The file may itself contain additional
               @file options; any such options will be processed recursively.
    
    
    

    SEE ALSO

           The Info pages for binutils.
    
    
    

    COPYRIGHT

           Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
           2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
           Free Software Foundation, Inc.
    
           Permission is granted to copy, distribute and/or modify this document
           under the terms of the GNU Free Documentation License, Version 1.3 or
           any later version published by the Free Software Foundation; with no
           Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
           Texts.  A copy of the license is included in the section entitled "GNU
           Free Documentation License".
    
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