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Always turn off hyphenation; it makes.\" way too many mistakes in technical documents..if n .ad l.nh.SH "NAME"dlltool \- Create files needed to build and use DLLs..SH "SYNOPSIS".IX Header "SYNOPSIS"dlltool [\fB\-d\fR|\fB\-\-input\-def\fR \fIdef-file-name\fR][\fB\-b\fR|\fB\-\-base\-file\fR \fIbase-file-name\fR][\fB\-e\fR|\fB\-\-output\-exp\fR \fIexports-file-name\fR][\fB\-z\fR|\fB\-\-output\-def\fR \fIdef-file-name\fR][\fB\-l\fR|\fB\-\-output\-lib\fR \fIlibrary-file-name\fR][\fB\-y\fR|\fB\-\-output\-delaylib\fR \fIlibrary-file-name\fR][\fB\-\-export\-all\-symbols\fR] [\fB\-\-no\-export\-all\-symbols\fR][\fB\-\-exclude\-symbols\fR \fIlist\fR][\fB\-\-no\-default\-excludes\fR][\fB\-S\fR|\fB\-\-as\fR \fIpath-to-assembler\fR] [\fB\-f\fR|\fB\-\-as\-flags\fR \fIoptions\fR][\fB\-D\fR|\fB\-\-dllname\fR \fIname\fR] [\fB\-m\fR|\fB\-\-machine\fR \fImachine\fR][\fB\-a\fR|\fB\-\-add\-indirect\fR][\fB\-U\fR|\fB\-\-add\-underscore\fR] [\fB\-\-add\-stdcall\-underscore\fR][\fB\-k\fR|\fB\-\-kill\-at\fR] [\fB\-A\fR|\fB\-\-add\-stdcall\-alias\fR][\fB\-p\fR|\fB\-\-ext\-prefix\-alias\fR \fIprefix\fR][\fB\-x\fR|\fB\-\-no\-idata4\fR] [\fB\-c\fR|\fB\-\-no\-idata5\fR][\fB\-\-use\-nul\-prefixed\-import\-tables\fR][\fB\-I\fR|\fB\-\-identify\fR \fIlibrary-file-name\fR] [\fB\-\-identify\-strict\fR][\fB\-i\fR|\fB\-\-interwork\fR][\fB\-n\fR|\fB\-\-nodelete\fR] [\fB\-t\fR|\fB\-\-temp\-prefix\fR \fIprefix\fR][\fB\-v\fR|\fB\-\-verbose\fR][\fB\-h\fR|\fB\-\-help\fR] [\fB\-V\fR|\fB\-\-version\fR][object\-file ...].SH "DESCRIPTION".IX Header "DESCRIPTION"\&\fBdlltool\fR reads its inputs, which can come from the \fB\-d\fR and\&\fB\-b\fR options as well as object files specified on the commandline. It then processes these inputs and if the \fB\-e\fR option hasbeen specified it creates a exports file. If the \fB\-l\fR optionhas been specified it creates a library file and if the \fB\-z\fR optionhas been specified it creates a def file. Any or all of the \fB\-e\fR,\&\fB\-l\fR and \fB\-z\fR options can be present in one invocation ofdlltool..PPWhen creating a \s-1DLL\s0, along with the source for the \s-1DLL\s0, it is necessaryto have three other files. \fBdlltool\fR can help with the creation ofthese files..PPThe first file is a \fI.def\fR file which specifies which functions areexported from the \s-1DLL\s0, which functions the \s-1DLL\s0 imports, and so on. Thisis a text file and can be created by hand, or \fBdlltool\fR can be usedto create it using the \fB\-z\fR option. In this case \fBdlltool\fRwill scan the object files specified on its command line looking forthose functions which have been specially marked as being exported andput entries for them in the \fI.def\fR file it creates..PPIn order to mark a function as being exported from a \s-1DLL\s0, it needs tohave an \fB\-export:<name_of_function>\fR entry in the \fB.drectve\fRsection of the object file. This can be done in C by using the\&\fIasm()\fR operator:.PP.Vb 2\& asm (".section .drectve");\& asm (".ascii \e"\-export:my_func\e"");\&\& int my_func (void) { ... }.Ve.PPThe second file needed for \s-1DLL\s0 creation is an exports file. This fileis linked with the object files that make up the body of the \s-1DLL\s0 and ithandles the interface between the \s-1DLL\s0 and the outside world. This is abinary file and it can be created by giving the \fB\-e\fR option to\&\fBdlltool\fR when it is creating or reading in a \fI.def\fR file..PPThe third file needed for \s-1DLL\s0 creation is the library file that programswill link with in order to access the functions in the \s-1DLL\s0 (an `importlibrary'). This file can be created by giving the \fB\-l\fR option todlltool when it is creating or reading in a \fI.def\fR file..PPIf the \fB\-y\fR option is specified, dlltool generates a delay-importlibrary that can be used instead of the normal import library to allowa program to link to the dll only as soon as an imported function iscalled for the first time. The resulting executable will need to belinked to the static delayimp library containing _\|\fI_delayLoadHelper2()\fR,which in turn will import LoadLibraryA and GetProcAddress from kernel32..PP\&\fBdlltool\fR builds the library file by hand, but it builds theexports file by creating temporary files containing assembler statementsand then assembling these. The \fB\-S\fR command line option can beused to specify the path to the assembler that dlltool will use,and the \fB\-f\fR option can be used to pass specific flags to thatassembler. The \fB\-n\fR can be used to prevent dlltool from deletingthese temporary assembler files when it is done, and if \fB\-n\fR isspecified twice then this will prevent dlltool from deleting thetemporary object files it used to build the library..PPHere is an example of creating a \s-1DLL\s0 from a source file \fBdll.c\fR andalso creating a program (from an object file called \fBprogram.o\fR)that uses that \s-1DLL:\s0.PP.Vb 4\& 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.Ve.PP\&\fBdlltool\fR may also be used to query an existing import libraryto determine the name of the \s-1DLL\s0 to which it is associated. See thedescription of the \fB\-I\fR or \fB\-\-identify\fR option..SH "OPTIONS".IX Header "OPTIONS"The command line options have the following meanings:.IP "\fB\-d\fR \fIfilename\fR" 4.IX Item "-d filename".PD 0.IP "\fB\-\-input\-def\fR \fIfilename\fR" 4.IX Item "--input-def filename".PDSpecifies the name of a \fI.def\fR file to be read in and processed..IP "\fB\-b\fR \fIfilename\fR" 4.IX Item "-b filename".PD 0.IP "\fB\-\-base\-file\fR \fIfilename\fR" 4.IX Item "--base-file filename".PDSpecifies the name of a base file to be read in and processed. Thecontents of this file will be added to the relocation section in theexports file generated by dlltool..IP "\fB\-e\fR \fIfilename\fR" 4.IX Item "-e filename".PD 0.IP "\fB\-\-output\-exp\fR \fIfilename\fR" 4.IX Item "--output-exp filename".PDSpecifies the name of the export file to be created by dlltool..IP "\fB\-z\fR \fIfilename\fR" 4.IX Item "-z filename".PD 0.IP "\fB\-\-output\-def\fR \fIfilename\fR" 4.IX Item "--output-def filename".PDSpecifies the name of the \fI.def\fR file to be created by dlltool..IP "\fB\-l\fR \fIfilename\fR" 4.IX Item "-l filename".PD 0.IP "\fB\-\-output\-lib\fR \fIfilename\fR" 4.IX Item "--output-lib filename".PDSpecifies the name of the library file to be created by dlltool..IP "\fB\-y\fR \fIfilename\fR" 4.IX Item "-y filename".PD 0.IP "\fB\-\-output\-delaylib\fR \fIfilename\fR" 4.IX Item "--output-delaylib filename".PDSpecifies the name of the delay-import library file to be created by dlltool..IP "\fB\-\-export\-all\-symbols\fR" 4.IX Item "--export-all-symbols"Treat all global and weak defined symbols found in the input objectfiles as symbols to be exported. There is a small list of symbols whichare not exported by default; see the \fB\-\-no\-default\-excludes\fRoption. You may add to the list of symbols to not export by using the\&\fB\-\-exclude\-symbols\fR option..IP "\fB\-\-no\-export\-all\-symbols\fR" 4.IX Item "--no-export-all-symbols"Only export symbols explicitly listed in an input \fI.def\fR file or in\&\fB.drectve\fR sections in the input object files. This is the defaultbehaviour. The \fB.drectve\fR sections are created by \fBdllexport\fRattributes in the source code..IP "\fB\-\-exclude\-symbols\fR \fIlist\fR" 4.IX Item "--exclude-symbols list"Do not export the symbols in \fIlist\fR. This is a list of symbol namesseparated by comma or colon characters. The symbol names should notcontain a leading underscore. This is only meaningful when\&\fB\-\-export\-all\-symbols\fR is used..IP "\fB\-\-no\-default\-excludes\fR" 4.IX Item "--no-default-excludes"When \fB\-\-export\-all\-symbols\fR is used, it will by default avoidexporting certain special symbols. The current list of symbols to avoidexporting is \fBDllMain@12\fR, \fBDllEntryPoint@0\fR,\&\fBimpure_ptr\fR. You may use the \fB\-\-no\-default\-excludes\fR optionto go ahead and export these special symbols. This is only meaningfulwhen \fB\-\-export\-all\-symbols\fR is used..IP "\fB\-S\fR \fIpath\fR" 4.IX Item "-S path".PD 0.IP "\fB\-\-as\fR \fIpath\fR" 4.IX Item "--as path".PDSpecifies the path, including the filename, of the assembler to be usedto create the exports file..IP "\fB\-f\fR \fIoptions\fR" 4.IX Item "-f options".PD 0.IP "\fB\-\-as\-flags\fR \fIoptions\fR" 4.IX Item "--as-flags options".PDSpecifies any specific command line options to be passed to theassembler when building the exports file. This option will work even ifthe \fB\-S\fR option is not used. This option only takes one argument,and if it occurs more than once on the command line, then lateroccurrences will override earlier occurrences. So if it is necessary topass multiple options to the assembler they should be enclosed indouble quotes..IP "\fB\-D\fR \fIname\fR" 4.IX Item "-D name".PD 0.IP "\fB\-\-dll\-name\fR \fIname\fR" 4.IX Item "--dll-name name".PDSpecifies the name to be stored in the \fI.def\fR file as the name ofthe \s-1DLL\s0 when the \fB\-e\fR option is used. If this option is notpresent, then the filename given to the \fB\-e\fR option will beused as the name of the \s-1DLL\s0..IP "\fB\-m\fR \fImachine\fR" 4.IX Item "-m machine".PD 0.IP "\fB\-machine\fR \fImachine\fR" 4.IX Item "-machine machine".PDSpecifies the type of machine for which the library file should bebuilt. \fBdlltool\fR has a built in default type, depending upon howit was created, but this option can be used to override that. This isnormally only useful when creating DLLs for an \s-1ARM\s0 processor, when thecontents of the \s-1DLL\s0 are actually encode using Thumb instructions..IP "\fB\-a\fR" 4.IX Item "-a".PD 0.IP "\fB\-\-add\-indirect\fR" 4.IX Item "--add-indirect".PDSpecifies that when \fBdlltool\fR is creating the exports file itshould add a section which allows the exported functions to bereferenced without using the import library. Whatever the hell thatmeans!.IP "\fB\-U\fR" 4.IX Item "-U".PD 0.IP "\fB\-\-add\-underscore\fR" 4.IX Item "--add-underscore".PDSpecifies that when \fBdlltool\fR is creating the exports file itshould prepend an underscore to the names of \fIall\fR exported symbols..IP "\fB\-\-add\-stdcall\-underscore\fR" 4.IX Item "--add-stdcall-underscore"Specifies that when \fBdlltool\fR is creating the exports file itshould prepend an underscore to the names of exported \fIstdcall\fRfunctions. Variable names and non-stdcall function names are not modified.This option is useful when creating GNU-compatible import libs for thirdparty DLLs that were built with MS-Windows tools..IP "\fB\-k\fR" 4.IX Item "-k".PD 0.IP "\fB\-\-kill\-at\fR" 4.IX Item "--kill-at".PDSpecifies that when \fBdlltool\fR is creating the exports file itshould not append the string \fB@ <number>\fR. These numbers arecalled ordinal numbers and they represent another way of accessing thefunction in a \s-1DLL\s0, other than by name..IP "\fB\-A\fR" 4.IX Item "-A".PD 0.IP "\fB\-\-add\-stdcall\-alias\fR" 4.IX Item "--add-stdcall-alias".PDSpecifies that when \fBdlltool\fR is creating the exports file itshould add aliases for stdcall symbols without \fB@ <number>\fRin addition to the symbols with \fB@ <number>\fR..IP "\fB\-p\fR" 4.IX Item "-p".PD 0.IP "\fB\-\-ext\-prefix\-alias\fR \fIprefix\fR" 4.IX Item "--ext-prefix-alias prefix".PDCauses \fBdlltool\fR to create external aliases for all \s-1DLL\s0imports with the specified prefix. The aliases are created for bothexternal and import symbols with no leading underscore..IP "\fB\-x\fR" 4.IX Item "-x".PD 0.IP "\fB\-\-no\-idata4\fR" 4.IX Item "--no-idata4".PDSpecifies that when \fBdlltool\fR is creating the exports and libraryfiles it should omit the \f(CW\*(C`.idata4\*(C'\fR section. This is for compatibilitywith certain operating systems..IP "\fB\-\-use\-nul\-prefixed\-import\-tables\fR" 4.IX Item "--use-nul-prefixed-import-tables"Specifies that when \fBdlltool\fR is creating the exports and libraryfiles it should prefix the \f(CW\*(C`.idata4\*(C'\fR and \f(CW\*(C`.idata5\*(C'\fR by zero anelement. This emulates old gnu import library generation of\&\f(CW\*(C`dlltool\*(C'\fR. By default this option is turned off..IP "\fB\-c\fR" 4.IX Item "-c".PD 0.IP "\fB\-\-no\-idata5\fR" 4.IX Item "--no-idata5".PDSpecifies that when \fBdlltool\fR is creating the exports and libraryfiles it should omit the \f(CW\*(C`.idata5\*(C'\fR section. This is for compatibilitywith certain operating systems..IP "\fB\-I\fR \fIfilename\fR" 4.IX Item "-I filename".PD 0.IP "\fB\-\-identify\fR \fIfilename\fR" 4.IX Item "--identify filename".PDSpecifies that \fBdlltool\fR should inspect the import libraryindicated by \fIfilename\fR and report, on \f(CW\*(C`stdout\*(C'\fR, the name(s)of the associated \s-1DLL\s0(s). This can be performed in addition to anyother operations indicated by the other options and arguments.\&\fBdlltool\fR fails if the import library does not exist or is notactually an import library. See also \fB\-\-identify\-strict\fR..IP "\fB\-\-identify\-strict\fR" 4.IX Item "--identify-strict"Modifies the behavior of the \fB\-\-identify\fR option, suchthat an error is reported if \fIfilename\fR is associated withmore than one \s-1DLL\s0..IP "\fB\-i\fR" 4.IX Item "-i".PD 0.IP "\fB\-\-interwork\fR" 4.IX Item "--interwork".PDSpecifies that \fBdlltool\fR should mark the objects in the libraryfile and exports file that it produces as supporting interworkingbetween \s-1ARM\s0 and Thumb code..IP "\fB\-n\fR" 4.IX Item "-n".PD 0.IP "\fB\-\-nodelete\fR" 4.IX Item "--nodelete".PDMakes \fBdlltool\fR preserve the temporary assembler files it used tocreate the exports file. If this option is repeated then dlltool willalso preserve the temporary object files it uses to create the libraryfile..IP "\fB\-t\fR \fIprefix\fR" 4.IX Item "-t prefix".PD 0.IP "\fB\-\-temp\-prefix\fR \fIprefix\fR" 4.IX Item "--temp-prefix prefix".PDMakes \fBdlltool\fR use \fIprefix\fR when constructing the names oftemporary assembler and object files. By default, the temp file prefixis generated from the pid..IP "\fB\-v\fR" 4.IX Item "-v".PD 0.IP "\fB\-\-verbose\fR" 4.IX Item "--verbose".PDMake dlltool describe what it is doing..IP "\fB\-h\fR" 4.IX Item "-h".PD 0.IP "\fB\-\-help\fR" 4.IX Item "--help".PDDisplays a list of command line options and then exits..IP "\fB\-V\fR" 4.IX Item "-V".PD 0.IP "\fB\-\-version\fR" 4.IX Item "--version".PDDisplays dlltool's version number and then exits..IP "\fB@\fR\fIfile\fR" 4.IX Item "@file"Read command-line options from \fIfile\fR. The options read areinserted in place of the original @\fIfile\fR option. If \fIfile\fRdoes not exist, or cannot be read, then the option will be treatedliterally, and not removed..SpOptions in \fIfile\fR are separated by whitespace. A whitespacecharacter may be included in an option by surrounding the entireoption in either single or double quotes. Any character (including abackslash) may be included by prefixing the character to be includedwith a backslash. The \fIfile\fR may itself contain additional@\fIfile\fR options; any such options will be processed recursively..SH "SEE ALSO".IX Header "SEE ALSO"The Info pages for \fIbinutils\fR..SH "COPYRIGHT".IX Header "COPYRIGHT"Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc..PPPermission is granted to copy, distribute and/or modify this documentunder the terms of the \s-1GNU\s0 Free Documentation License, Version 1.3or any later version published by the Free Software Foundation;with no Invariant Sections, with no Front-Cover Texts, and with noBack-Cover Texts. A copy of the license is included in thesection entitled \*(L"\s-1GNU\s0 Free Documentation License\*(R".
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