More Win32 1.5 -> HEAD synchronisation. Updated documentation regarding gds32.dll and instclient.exe

doc/README.Win32LibraryInstallation.txt

@@ -0,0 +1,117 @@
+
+One of the design goals of Firebird 1.5 is to prepare the way for multiple 
+installs of the server. This will allow users to run different versions 
+side by side. Firebird 1.5 does support this, although it is not well 
+documented and very much requires intervention from a skilled user. Future
+versions of Firebird will make this process far less complicated. In the 
+meantime Firebird 1.5 needs to prepare the ground. This forces us to 
+confront the issue of library installation. At the same time, Microsoft 
+have taken their own steps to manage installation of different library 
+versions. Taken together these two separate issues mean a new approach to 
+library installation for Firebird 1.5 and beyond.
+
+1/ Installation of Microsoft system libraries. 
+
+The problems associated with installing different versions of Microsoft 
+system libraries are so notorious that it has acquired the name
+'DLL Hell'. 
+
+From the release of Windows 2000 onwards Microsoft have made it almost 
+impossible to upgrade system dll's. To resolve this Microsoft now 
+recommend that each application installs local copies of any system 
+libraries that are required. 
+
+Firebird 1.5 follows this practice for all Microsoft platforms from 
+Windows 2000 onwards and places the required libraries in the \bin directory 
+along with the server. When installed on older systems (Win 9x, NT) it follows 
+the standard practice and attempts to upgrade older versions of the system 
+libraries.
+
+
+2/ Installation of fbclient.dll.
+
+Firebird 1.5 and beyond no longer use gds32.dll as the client library. 
+It is now called fbclient.dll. Given the problems that Microsoft have 
+had with DLL hell it wouldn't make much sense if we continued to store the 
+Firebird client library in the <system> directory. And as we want to allow 
+installation of multiple engines simultaneously we would be creating our 
+own DLL hell if we continued the practice of using the <system> directory 
+for the client library. So, from Firebird 1.5 on, the client library resides 
+in the \bin directory along with all the other binaries.
+
+A new registry key has been added and all Firebird compliant applications
+should now use this to locate the correct version of Firebird that they wish 
+to use. The new key is:
+
+  HKEY_LOCAL_MACHINE\SOFTWARE\Firebird Project\Firebird Server\Instances
+
+Firebird will guarantee that one entry under this key always exists. It will 
+be known as
+
+  "DefaultInstance"
+  
+and will store the path to the root directory of (yes, you've guessed it) 
+the default installation. Those that don't care about particular 
+installations can alway use the default instance to locate the fbclient.dll.
+
+Future versions of Firebird will see other entries under Instances. 
+Applications will be able to enumerate the registry entries to determine
+which library instance the wish to load. 
+
+
+3/ Supporting legacy applications and drivers.
+
+Traditionally, applications that use InterBase or Firebird have expected to
+load the gds32.dll client library from the <system> directory. Firebird 1.5
+ships a tool named 'instclient.exe' that can install a clone of fbclient.dll
+to the Windows System directory. This clone gets patched on the fly so that
+its file version information starts in "6.3". This is done so because some
+old applications do extra checks on the GDS32.DLL file version. Based on a
+lot of experiments, it has been determined that 6.3 is a safe "compatible"
+version number to use, much better than "1.5".
+
+During the installation process the installer checks to see if an 
+installation of InterBase or Firebird exists. If nothing is installed 
+it will write a patched gds32.dll into the <system> directory. If it detects
+that any possible version of Firebird or InterBase may already be installed
+it will not install the gds32.dll in the <system> directory. However
+you can always do so later by using the new 'instclient.exe' tool.
+
+It is intended that future versions of Firebird will not attempt to 
+install gds32.dll into the <system> directory and ultimately it will
+be completely removed from the distribution.
+
+This 'instclient.exe' tool can also install the FBCLIENT.DLL itself in the
+Windows system directory. This can be preferred by some tools or
+applications and we don't want to miss any use case.
+
+instclient
+Usage:
+  instclient i[nstall] [ -f[orce] ] library
+             q[uery] library
+             r[emove] library
+
+  where library is:  fbclient | gds32
+
+  This utility should be located and run from the 'bin' directory
+  of your Firebird installation.
+  '-z' can be used with any other option, prints version
+
+Purpose:
+  This utility manages deployment of the Firebird client library
+  into the Windows system directory. It caters for two installation
+  scenarios:
+
+    Deployment of the native fbclient.dll.
+    Deployment of gds32.dll to support legacy applications.
+
+  Version information and shared library counts are handled
+  automatically. You may provide the -f[orce] option to override
+  version checks.
+
+  Please, note that if you -f[orce] the installation, you might have
+  to reboot the machine in order to finalize the copy and you might
+  break some other Firebird or InterBase(R) version on the system.
+
+
+

doc/install_win32.txt

@@ -24,23 +24,22 @@ Firebird 1.5 installation notes
 
   Now the client library is named "fbclient.dll". To provide a
   compatibility with existing applications, a gateway library
-  "gds32.dll" is included in the distribution kit. This library
-  doesn't have any code but just redirects all calls to
-  fbclient.dll. Hence for old applications you must to have both
-  fbclient.dll and gds32.dll in the program directory or OS system
-  directory. It's recommended to use native fbclient.dll library
+  "gds32.dll" can be installed to the Windows System Directory.
+  See instclient.exe utility for this. This tool can also properly
+  install fbclient.dll to Windows System Directory, should you like or
+  need so.
+  It's recommended to use native fbclient.dll library
   in newly developed applications. All server utilities (gbak,
   gfix, etc) uses only fbclient.dll and do not require gds32.dll.
 
 1.3. New configuration file
 
-  inconfig file is no longer used and it has been replaced with
+  ibconfig file is no longer used and it has been replaced with
   firebird.conf, which is a part of new configuration manager and
   allows you to use both old and some new options. You can see
   the list of all supported configuration options (as well as
   their default values) in the distributed version of this file.
   
-
 1.4. Classic Server (CS)
 
   Since Firebird 1.5, Classic engine is included in win32
@@ -107,8 +106,37 @@ Firebird 1.5 installation notes
     (HKLM\Software\Firebird Project\Firebird Server\Instances)
   - if you want to register a service, run also instsvc.exe:
       instsvc.exe install
-  - optionally, you should copy both fbclient.dll and gds32.dll
-    to the OS system directory
+    (This is a Windows NT/2K/XP specific step.)
+  - optionally, you can copy both fbclient.dll and gds32.dll
+    to the OS system directory. To do so, use the provided instclient.exe
+    tool.
+    
+    Usage:
+      instclient i[nstall] [ -f[orce] ] library
+                 q[uery] library
+                 r[emove] library
+
+      where library is:  f[bclient] | g[ds32]
+
+      This utility should be located and run from the 'bin' directory
+      of your Firebird installation.
+      '-z' can be used with any other option, prints version
+
+    Purpose:
+      This utility manages deployment of the Firebird client library
+      into the Windows system directory. It caters for two installation
+      scenarios:
+
+        Deployment of the native fbclient.dll.
+        Deployment of gds32.dll to support legacy applications.
+
+      Version information and shared library counts are handled
+      automatically. You may provide the -f[orce] option to override
+      version checks.
+
+      Please, note that if you -f[orce] the installation, you might have
+      to reboot the machine in order to finalize the copy and you might
+      break some other Firebird or InterBase(R) version on the system.
   
 2.2. Installation of CS
 
@@ -127,16 +155,18 @@ Firebird 1.5 installation notes
     fbserver.exe -a
   It should treat its parent directory as a root directory in this
   case.
+  You can also use instclient.exe to copy client library to System.
 
 2.4. Uninstallation
 
   To remove FB 1.5 you should:
 
-  - stop the server
-  - run "instreg.exe remove"
+  - stop the server (running "instsvc.exe stop" for instance)
   - run "instsvc.exe remove"
+  - run "instreg.exe remove"
+  - run "instclient.exe remove fbclient" and/or "insclient.exe remove gds32"
+    if you used that tool to install those libraries the OS system directory.
   - delete installation directory
-  - delete fbclient.dll and gds32.dll from the OS system directory
 
 3. INFORMATION ABOUT THIS VERSION