DOCUMENT:Q182045 11-FEB-2002 [visualc] TITLE :FIX: Excessive Delay Before Build, Export Makefile, or Debug PRODUCT :Microsoft C Compiler PROD/VER::5.0,6.0 OPER/SYS: KEYWORDS:kbDebug kbide kbVC kbVC500bug kbVC600bug kbGrpDSTools kbNoUpdate ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0 - Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0 - Microsoft Visual C++, 32-bit Learning Edition, version 6.0 ------------------------------------------------------------------------------- SYMPTOMS ======== After you start a build in Microsoft Developer Studio, there could be an excessive delay before the actual build begins. This typically happens when building a large project. The delay can be about 3-5 minutes and an hourglass is shown in the Developer Studio. Then the build proceeds normally. This happens even when the project is up-to-date. This delay occurs only when you try to build the first time after opening the workspace. Subsequent builds do not experience the delay. This delay happens only in Developer Studio running under Windows 95. CAUSE ===== This delay is caused by the dependency checking preceding the build. Before the build can start, Developer Studio needs to check file dependencies to decide which files are to be built. For a large project with complex dependencies, Developer Studio can spend a long time checking file timestamp information on a Windows 95 machine. RESOLUTION ========== The following are two related workarounds. You should try Workaround 1 first; if that does not work, then consider the second workaround combined with the first workaround: Workaround 1. Use compiler switches /Yc and /Yu to create and use a precompiled header. Workaround 2. Use a precompiled header aggressively by including most of your project's header files in the precompiled header. STATUS ====== Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This problem was corrected in Microsoft Visual C++ .NET. MORE INFORMATION ================ This delay can also be experienced when you try to export the makefile or start a debug session the first time after opening the workspace. Additional query words: hang stall pause ====================================================================== Keywords : kbDebug kbide kbVC kbVC500bug kbVC600bug kbGrpDSTools kbNoUpdate Technology : kbVCsearch kbAudDeveloper kbVC500 kbVC600 kbVC32bitSearch kbVC500Search Version : :5.0,6.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.