Microsoft small business knowledge base

Article ID: 942312 - Last Review: October 8, 2011 - Revision: 2.0

Hotfix Download Available
View and request hotfix downloads

On This Page


The Gnu C Compiler (GCC) that is included in Microsoft Windows Services for UNIX 3.5 cannot guarantee that the directives in the GCC assemblies are consistently aligned with the 16-byte boundaries.


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: (
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this hotfix, you must have Windows Services for UNIX 3.5 installed on the computer.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Collapse this tableExpand this table
File nameFile versionFile sizeDateTime
ArNot Applicable284,16003-Jul-200709:33
AsNot Applicable485,37603-Jul-200709:33
GcovNot Applicable50,17603-Jul-200709:33
GdbNot Applicable3,266,56003-Jul-200709:33
LdNot Applicable515,58403-Jul-200709:33 Applicable28,67203-Jul-200709:33 Applicable10,24003-Jul-200709:33
NmNot Applicable324,60803-Jul-200709:33
ObjcopyNot Applicable452,60803-Jul-200709:33
ObjdumpNot Applicable500,73603-Jul-200709:33


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


GCC assemblies have the .comm directive and the .lcomm directive. These directives are used to define global symbols and local symbols. In an Interix environment, these symbols are not always aligned with the 16-byte boundaries. However, if you use a custom compiler to compile the GCC assemblies that are not aligned with the 16-byte boundaries, any optimization that is used by the custom compiler will fail.

Windows Services for UNIX 3.5 includes the Interix subsystem technology. The GCC is a compiler in the Interix subsystem technology. For more information about the Interix subsystem technology, visit the following Microsoft Web site: (
For more information about the align (C++) modifier, visit the following Web site: (
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684  ( ) Description of the standard terminology that is used to describe Microsoft software updates

  • Microsoft Windows Services for UNIX 3.5
kbautohotfix kbexpertiseadvanced kbfix kbqfe KB942312
Additional support options
Ask The Microsoft Small Business Support Community
Contact Microsoft Small Business Support
Find Microsoft Small Business Support Certified Partner
Find a Microsoft Store For In-Person Small Business Support