Indy with Lazarus/ja

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Windowsへのインストールの仕方 - Indy 10.2.03

このページには、「/* How to install [3] Windows, Indy and above */」などの情報があるが、ほとんどのユーザーにとっては、そこに記載されている方法ではうまく行かないだろう。または、バージョン間の違いや矛盾する説明によって混乱させられるだろう。

例えば、Indyのwebサイトでは、最新版を snapshots のページからダウンロードするように指示してある。
それに対して、この wiki では、ディレクトリに入って行って、多くのファイルをコピーするように指示していたりする。
  1. まず、右のURLからindy10.2.03をダウンロードする。 here. (訳注:IndyのWebサイトの構成がおかしいため、普通の方法ではたどり着けない(少なくとも私は))。他のサイトから取ってきたファイルはアーカイブ内に問題があった。
  2. 1.でダウンロードしたファイルを解凍すると、2つのフォルダ "fpc" と "lazarus" ができるはずだ。
    1. "fpc" フォルダの名前を「indylaz」に変え、右側に示す構成となるように、コピーする。(訳注:右側の「LAZARUS_DIR」はLazarusのインストールフォルダを示す。): LAZARUS_DIR\fpc\3.0.0\source\packages\indylaz
    2. "lazarus" フォルダの名前を「indylaz」に変え、右側に示す構成となるように、コピーする。: LAZARUS_DIR\components\indylaz
    3. どちらのフォルダにも、サブディレクトリが含まれないことを確認する。例: LAZARUS_DIR\components\indylaz\lazarus\ となっている場合、最下位のlazarusフォルダの中身を、その上位のindylazに移動させて、最下位のlazarusフォルダは削除する。
  3. Lazarus を起動して、上側メニューの "パッケージ(P)" から "パッケージファイル(.lpk)を開く..." を選択し、LAZARUS_DIR\components\indylaz ディレクトリ内の "indylaz.lpk" を開く。
  4. パッケージがロードされたら、、"options" ボタンを押す。
  5. "コンパイラオプション" を選び、"Other unit files (-Fu)" の隣の、".." ボタンをクリックする。

    "fpc" を選択し、2-2で作成した "lazarus" フォルダを選んでOKを押す。相対パスは Lazarus がソートしてくれるので、変更しないこと。

  6. OK を押すと、Lazarus IDE のコンパイルが始まる。うまく行ったら、これまで役に立たない説明をして君に面倒な手間をかけさせていたやつに怒りをぶつけてやるんだね。

Windows 64bit版 における注意点

Windows 64bit版 では、上に記載した内容だけではうまくコンパイルできない。 これは、 IdAntiFreeze.pas を以下の様に修正することで治る。(20160512時点において、Windows8.1、64bitで確認):

  TIdAntiFreeze = class(TIdAntiFreezeBase)
    procedure Process; override;


  TIdAntiFreeze = class(TIdAntiFreezeBase)
    {$IFDEF WIN32}
    procedure Process; override;

Indy for Lazarus

A new attempt at converting Indy is being undertaken by the Indy core team. FPC developer Marco van de Voort is working with Indy core to get Indy fully working with FPC/Lazarus. Specially Indy's JP Mugaas did a lot of good work in getting Indy10 to work with FPC. The native unixrtl backend is mostly his work too.

Currently Indy10 is nearly fully working, and end-user usability has been improved a lot. Only special topics like OpenSSL and compression might need additional knowledge. 64-bit support hasn't entirely been validated either.

Hint: I'm not very interested in support the Kylix side of Indy. (anything that uses unit libc). I ported it only as step up to native Unix RTL using Indy apps.


Currently, FPC 2.0.4 is very close to being able to use indy in all its facets, except for the server bug on FreeBSD/Mac OS X (which requires 2.1.1)

Since Indy10 now works for all major targets, we focus on this version. While conversion to Indy9 might be simpler for people, keep in mind that it only works on win32. (and theoretically could be ported to Linux/x86).

Therefore we recommend people to work with 10 as much as possible.

(For indy9, you might need to remove the overriding of tmemorystream.setsize method (Marcov: ???) to get telnet components working, but Indy9 hasn't been tested in a while)

The port is fairly stable, and JP Mugaas has done a great deal to improve the quality of the release, a set of makefiles inclusive

Downloads / Links

Current snapshots (for die hards only) are at

What works, what not


  • Windows should largely work. Lots of demos ported.
  • Linux not or barely. No hope at non Linux/x86 (non-Kylix) targets.


  • Windows and Unix: clients work and servers should work fine in principle.
  • The main work for native Unix RTL done. Servers Clients seem to work with FreeBSD and OS X

All: secure versions not tested yet.

Short term plans

  • Convert demos to demonstrate/test workings.
  • Fix bugs and enter them back into FPC or Indy RCS.


  • Indy9 and Indy10 are mutually exclusive, which causes problems for deployment, even the default is a problem:
    • Indy9 is more used and proven in the industry.
    • Indy10 is more portable, and better long term. However uptake seems to be low, and there is not much movement at Indy anymore.
  • How to deploy? Parts belong to Lazarus, parts to FPC.
  • Lot of pkgs and demos have paths in them. How to centrally fix them so that inexperienced users can build them?
  • Lazarus problems
    • Transparency problems of icons
    • component tabs don't scroll, if you put a lot of components in one tab, they are not selectable. workaround implemented: JP Mugaas separated them into Indy clients A-M and N-Z etc. Also, meanwhile Lazarus changed to two rows of components per tab.
  • Indy demos (specially Indy10's) are not very suitable for multiplatform usage. Their setup is awfully windows specific, with spaces in paths, deep nested dirs, and useless baggage (C# code). A short working set of demos will have to be created.


  • Indy10 servers didn't work before due to an exception occurring during startup, which shut everything down. You need FPC 2.2(.0) or later to fix this (pthread_kill problem). This probably also affects Mac OS X.
  • During demo conversion, the bindings property is often wrongly converted. This can result in strange errors, specially because Indy seems to bind to the same port using both IPV4 and IPV6 at the same time.

Ubuntu 10.04 + Lazarus 0.9.28 + Indy 10(Server Component) -> launch & do nothing (just crash)

Solution ( collect and organize data): (1).Lazarus Main menu -> Project -> Compiler Options -> Other Page , add the "-dUseCThreads" parameter. (2).force the IdTCPServer to work in Id_IPV4 mode.

procedure TForm1.FormActivate(Sender: TObject);
  Binding: TIdSocketHandle;
  //uses idGlobal
  //explicitly adding a Binding object prevents TIdTCPServer
  //from creating its own default IPv4 and IPv6 Binding objects
  //on the same listening IP/Port pair...
  Binding := IdTCPServer1.Bindings.Add;
  Binding.IPVersion := Id_IPv4; //optional: forces the Binding to work in Id_IPV4 mode.
  Binding.IP := '';
  Binding.Port := 6501; //customization 
  IdTCPServer1.Active := True;  

(3)use TIdSync to Control your GUI in IdTCPServer's OnExecute() even.

How to install

Matthijs: So it is not perfect yet, but you want to try it. Here is how you install it in Lazarus.

  • Open and compile indysystemlaz.lpk
  • Open and compile indycorelaz.lpk
  • Open and compile indyprotocolslaz.lpk
  • Open, compile and install dclindycorelaz.lpk
  • Open, compile and install dclindyprotocolslaz.lpk

Then rebuild Lazarus and you will see a 15 tab's with Indy components.

How to install on debian/ubuntu

  • # cd indy-
  • # chmod +x debian/rules
  • # touch README
  • # sudo apt-get install fakeroot
  • # dpkg-buildpackage -rfakeroot -uc
  • # cd ..
  • # sudo dpkg -i *.deb
  • install package indylaz.lpk in lazarus

How to install [2]

If you couldn't install Indy for Lazarus with tips above, you can try this...

From Yahoo! Brazil, Lazarus Group (User Everaldo)

Version installed on Lazarus 0.9.24 using component indy-

  • Unzip the component from file tar.gz (must be this file, the "zip file" does not work) in directory $(LazarusDir)\components;
  • Go to directory $(LazarusDir)\components\indy-\ and to create inside them a directory named "saved";
  • Copy the content of the directory $(LazarusDir)\components\indy-\lazarus\ to directory "saved" created above;
  • Copy the content of directory $(LazarusDir)\components\indy-\fpc\ to directory $(LazarusDir)\components\indy-\lazarus, and rewrite all files, ok;
  • Get the content of directory "saved" and copy inside of $(LazarusDir)\components\indy-\lazarus and you can delete "saved" directory now;
  • Install the package laz.lpk (available in $(LazarusDir)\components\indy-\lazarus\indy) of conventional way.

On LINUX the path is: /usr/lib/lazarus/components/indy-

How to install [3] Windows and Debian linux, Indy and above

  • Need working Lazarus (and FPC) for this
  • Download from Or from the alternate web site for the updated and current versions:
  • unpack into a directory
  • copy the *.pas, *.lrs and *.inc of the \Lib\System, \Lib\Core, and \Lib\Protocols subdirectories into a new directory of your choosing
  • copy the indylaz.lpk in the \Lib directory to the directory you created above
  • from within Lazarus do a Package -> Open package file, open the indylaz.lpk
  • in the Package Options dialog, add the path to the directory you created above to the "Unit" field.
  • compile then install (will rebuild Lazarus). EDIT: Currently, due to a know bug in FPC, you must compile the Indy package TWICE before installing it.

In order to write & compile Indy10 applications, you need to put the path to the Indy directory in the "Other Unit files" textbox of every project that you write. You'll find "Other Unit files" under Project Options -> Compiler Options -> Paths.

How to install (confirmed) on Windows - Indy 10.2.03

/* How to install [3] Windows, Indy and above */ For a lot of users, I'm sure that the information given above won't work, or will be somewhat confusing given the differences between versions and inconsistent explanations.

The website points you to download the latest version from the snapshots page.
This wiki tells you to copy a lot of files over into directories.
For me, neither worked, and ended up making a mess of my Lazarus installations.
  1. Firstly, the page I would retrieve this from is here. Other sites I tried had problems with some files inside the archive.
  2. When you open up the archive above, you will see there are folders: "fpc" and "lazarus".
    1. You can copy the contents of "fpc" into: LAZARUS_DIR\fpc\2.6.0\source\packages\indylaz if you want to have things neat and tidy.
    2. The "lazarus" folder, you copy into LAZARUS_DIR\components\indylaz
    3. With both of these, make sure that there isn't a sub-directory inside the folders given. i.e. LAZARUS_DIR\components\indylaz\lazarus\
  3. Go into Lazarus and go to "Package" -> "Open package file" and point it to the "indylaz.lpk" inside the LAZARUS_DIR\components\indylaz directory.
  4. Once the package loads inside your project, click on the "options" button, which resembles an image of a parcel with a cog next to it.
  5. Click the "Compiler Options" on the left-hand side and Click on the ".." button next to "Other unit files (-Fu) (delimiter is semicolon)".

Select the "fpc" then "lazarus" folders you created above and click OK. Lazarus will sort out the relative path for you. Don't change it.

  1. Click OK and compile and then direct angry bile towards the individual who has steered you wrong with the previous, unhelpful, instructions.

Issue on Windows 64bits

On Windows 64bits, the compilation of the archive mentioned above will not work. This can be fixed by editing IdAntiFreeze.pas, replacing :

  TIdAntiFreeze = class(TIdAntiFreezeBase)
    procedure Process; override;


  TIdAntiFreeze = class(TIdAntiFreezeBase)
    {$IFDEF WIN32}
    procedure Process; override;

External links