Drop requirements needed only for Win9x support

Don't require and distribute unicows.dll and instmsia.exe (Windows
Installer 2.0 installer for Win9x). Drop the Win9x-specific code in
setup.exe. Do still require and distribute gdiplus.dll for Win2k
support (bnc#522833).

desktop/win32/source/setup/makefile.mk

@@ -58,7 +58,6 @@ ULFDIR:=.
 .ENDIF			# "$(WITH_LANG)"!=""
 
 OBJFILES= 	$(OBJ)$/setup_main.obj \
-            $(OBJ)$/setup_a.obj \
             $(OBJ)$/setup_w.obj
 
 # --- Targets ------------------------------------------------------

desktop/win32/source/setup/setup.cpp

@@ -1321,9 +1321,7 @@ boolean SetupAppX::AlreadyRunning() const
     const TCHAR sGUniqueName[] = TEXT( "Global\\_MSISETUP_{EA8130C1-8D3D-4338-9309-1A52D530D846}" );
     const TCHAR sUniqueName[]  = TEXT( "_MSISETUP_{EA8130C1-8D3D-4338-9309-1A52D530D846}" );
 
-    if ( IsWin9x() )
-        sMutexName = sUniqueName;
-    else if ( ( GetOSVersion() < 5 ) && ! IsTerminalServerInstalled() )
+    if ( ( GetOSVersion() < 5 ) && ! IsTerminalServerInstalled() )
         sMutexName = sUniqueName;
     else
         sMutexName = sGUniqueName;
@@ -1394,8 +1392,7 @@ void SetupAppX::Log( LPCTSTR pMessage, LPCTSTR pText ) const
         if ( !bInit )
         {
             bInit = true;
-            if ( ! IsWin9x() )
-                _ftprintf( m_pLogFile, TEXT("%c"), 0xfeff );
+            _ftprintf( m_pLogFile, TEXT("%c"), 0xfeff );
 
             _tsetlocale( LC_ALL, TEXT("") );
             _ftprintf( m_pLogFile, TEXT("\nCodepage=%s\nMultiByte Codepage=[%d]\n"),
@@ -1653,9 +1650,6 @@ boolean SetupAppX::GetCmdLineParameters( LPTSTR *pCmdLine )
 //--------------------------------------------------------------------------
 boolean SetupAppX::IsAdmin()
 {
-    if ( IsWin9x() )
-        return true;
-
     PSID aPsidAdmin;
     SID_IDENTIFIER_AUTHORITY aAuthority = SECURITY_NT_AUTHORITY;
 

desktop/win32/source/setup/setup_main.cxx

@@ -63,7 +63,6 @@ SetupApp::SetupApp()
 
     m_nOSVersion    = sInfoOS.dwMajorVersion;
     m_nMinorVersion = sInfoOS.dwMinorVersion;
-    m_bIsWin9x      = ( VER_PLATFORM_WIN32_NT != sInfoOS.dwPlatformId );
     m_bNeedReboot   = false;
     m_bAdministrative = false;
 }
@@ -88,14 +87,9 @@ extern "C" int __stdcall WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, int )
 
     GetVersionEx( &sInfoOS );
 
-    boolean bIsWin9x = ( VER_PLATFORM_WIN32_NT != sInfoOS.dwPlatformId );
-
     SetupApp *pSetup;
 
-    if ( bIsWin9x )
-        pSetup = Create_SetupAppA();
-    else
-        pSetup = Create_SetupAppW();
+    pSetup = Create_SetupAppW();
 
     try
     {

desktop/win32/source/setup/setup_main.hxx

@@ -33,7 +33,6 @@ class SetupApp
 {
     DWORD           m_nOSVersion;
     DWORD           m_nMinorVersion;
-    boolean         m_bIsWin9x      : 1;
     boolean         m_bNeedReboot   : 1;
     boolean         m_bAdministrative : 1;
 
@@ -57,7 +56,6 @@ public:
     virtual void    DisplayError( UINT nErr ) const = 0;
 
     void            SetError( UINT nErr ) { m_uiRet = nErr; }
-    boolean         IsWin9x() const { return m_bIsWin9x; }
     DWORD           GetOSVersion() const { return m_nOSVersion; }
     DWORD           GetMinorVersion() const { return m_nMinorVersion; }
 
@@ -68,7 +66,6 @@ public:
     boolean         NeedReboot() const { return m_bNeedReboot; }
 };
 
-SetupApp* Create_SetupAppA();
 SetupApp* Create_SetupAppW();
 
 #endif