Compilation error while building chromium - visual-studio-2010

Question

I am trying to build chromium on Windows 7 64 bit using VS2010.
I am getting error in building webkit.Here is error
1>------ Build started: Project: generate_supplemental_dependency, Configuration: Debug Win32 ------
1>Build started 11/11/2012 12:22:17 AM.
1>InitializeBuildStatus:
1> Touching "../../../../..\build\Debug\obj\generate_supplemental_dependency\generate_supplemental_dependency.unsuccessfulbuild".
1>CustomBuild:
1> Resolving [Supplemental=XXX] dependencies in all IDL files
1> 6 [main] perl 5908 child_copy: linked dll data write copy failed, 0xD2A000..0xD49C48, done 0, windows pid 5972, Win32 error 487
1> Can't call method "fileName" without a package or object reference at ../bindings/scripts/IDLParser.pm line 113.
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(151,5): error MSB6006: "cmd.exe" exited with code 255.
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:09.56
2>------ Build started: Project: webcore_bindings_sources, Configuration: Debug Win32 ------
2>Build started 11/11/2012 12:22:27 AM.
2>InitializeBuildStatus:
2> Touching "../../../../..\build\Debug\obj\webcore_bindings_sources\webcore_bindings_sources.unsuccessfulbuild".
2>CustomBuild:
2> HTMLEntityTable
2> Running call "C:\chrome\src\third_party\WebKit\Source\WebCore\WebCore.gyp\..\..\..\..\..\third_party\cygwin\setup_env.bat"
2> make: *** No rule to make target `/cygdrive/c/chrome/src/build/Debug/\obj\global_intermediate\supplemental_dependency.tmp', needed by `/cygdrive/c/chrome/src/build/Debug/\obj\global_intermediate\webcore\bindings\V8SpeechRecognitionEvent.cpp'. Stop.
2> make: *** No rule to make target `/cygdrive/c/chrome/src/build/Debug/\obj\global_intermediate\supplemental_dependency.tmp', needed by `/cygdrive/c/chrome/src/build/Debug/\obj\global_intermediate\webcore\bindings\V8SpeechRecognitionEvent.cpp'. Stop.
2> HTMLNames, and also WebKitFontFamilyNames, and also SVGNames, and also MathMLNames, and also XLinkNames, and also XMLNSNames, and also XMLNames
2> Failed to read names from file: C:/chrome/src/third_party/WebKit/Source/WebCore/html/HTMLTagNames.in at C:\chrome\src\third_party\WebKit\Source\WebCore\dom\make_names.pl line 290.
2> Traceback (most recent call last):
2> File "scripts/action_makenames.py", line 185, in <module>
2> File "scripts/action_makenames.py", line 167, in main
2> AssertionError
2>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\Microsoft.CppCommon.targets(151,5): error MSB6006: "cmd.exe" exited with code 1.
2>
2>Build FAILED.
I search this error a lot on net and most of the solutions were related to cygwin rebasing.
they have mentionded to use following commad to rebase cygwin
ash.exe rebaseall
But I am not able to find ash or rebase all in cygwin director in third_party/cygwin folder.
Any idea about this error?

Answer 1

This error indicates that your cygwin installation does not contain (d)ash package. The best way to install cygwin with all the dependencies need for chrome is to run the cygwin-downloader.py.
This will install all the required dependencies, including ash.
Or else if you prefer to install ash.exe only, run the setup search for package dash include this package and proceed with the setup.