<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>17817</bug_id>
          
          <creation_ts>2008-03-12 21:35:15 -0700</creation_ts>
          <short_desc>REGRESSION (r30981): Release build broken under VC++ Express due to PGO</short_desc>
          <delta_ts>2008-03-13 11:39:35 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>Tools / Tests</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>PC</rep_platform>
          <op_sys>Windows XP</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Adam Roben (:aroben)">aroben</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>sfalken</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>73542</commentid>
    <comment_count>0</comment_count>
    <who name="Adam Roben (:aroben)">aroben</who>
    <bug_when>2008-03-12 21:35:15 -0700</bug_when>
    <thetext>r30981 turned on Profile-Guided Optimization (PGO) in the Windows Release configuration by default. VC++ Express doesn&apos;t support PGO, so the Release build is broken by default for all VC++ Express users.

There is a workaround, which is to turn off PGO using the following command:

sed -i -e &apos;s/LinkTimeCodeGeneration=&quot;4&quot;/LinkTimeCodeGeneration=&quot;1&quot;/&apos; ~/WebKit/WebKit/win/WebKit.vcproj/WebKit.vcproj

We need to make the build work by default again!</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>73611</commentid>
    <comment_count>1</comment_count>
    <who name="Adam Roben (:aroben)">aroben</who>
    <bug_when>2008-03-13 11:39:35 -0700</bug_when>
    <thetext>Fixed by sfalken in r31033, which turned off PGO by default.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>