Re: [Boost-users] How to disable the check or the error after checking for ICU (for regex lib) when building boost ?

Subject: Re: [Boost-users] How to disable the check or the error after checking for ICU (for regex lib) when building boost ?
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2010-09-04 01:07:43

Timothy Madden wrote:

> On 02.09.2010 14:15, Vladimir Prus wrote:
>> Timothy Madden wrote:
>>
>>> On 8/16/2010 4:30 PM, Ilya Sokolov wrote:
>>>> Timothy Madden wrote:
>>>>> John Maddock wrote:
>>>>>>> I get the following message when compiling boost from trunk:
>>>>>>>
>>>>>>> 1>Building the Boost C++ Libraries.
>>>>>>> 1>has_icu_test.cpp
>>>>>>> 1>libs\regex\build\has_icu_test.cpp(12) : fatal error C1083: Cannot
>>>>>>> open include file: 'unicode/uversion.h': No such file or directory
>>>>>>> 1>Performing configuration checks
>>>>>>> 1>  - has_icu builds : no
>>>>>>>
>>>>>>> Although the build succeeds (as this is a test) Visual Studio
>>>>>>> recognizes the error in the output and stops compiling the project
>>>>>>> and reports the build as failed.
>>>>>>>
>>>>>>> Is there a way for me to suppress this message ? Or this test ?
>>>>>>>
>>>>>>> Attempting to redirect output with&>outfile.txt do not work as the
>>>>>>> error messages still gets output in VS. Are there and build options
>>>>>>> to disable this check ?
>>>>>>
>>>>>> No not at present, unless they're present in Boost.Build somewhere.
>>>>>> Actually I *never* see this error message just the
>>>>>>
>>>>>> Performing configuration checks
>>>>>> - has_icu builds : no
>>>>>>
>>>>>> part. I'm not sure what controls this, but I'll try and find out.
>>>>>
>>>>> Please, it will help me prevent the build from stopping in VS.
>>>>>
>>>>> This happens on the trunk version of boost, from svn, the release
>>>>> tarball indeed does not display the message. Actually this only
>>>>> happens when building boost as a custom build step in my project's
>>>>> build process, from Visual Studio 2008. Building from the command line
>>>>> does not display the message. Which might make sense, since the
>>>>> message does not follow output redirection anyway.
>>>>>
>>>>> Maybe cl.exe somehow feels it is invoked from a subprocess of VS, or
>>>>> sees some environment variables, and knows how to output the message ?
>>>>
>>>> Yes, it's watching for VS_UNICODE_OUTPUT environment variable.
>>>> http://connect.microsoft.com/MSDNProductFeedbackCenterRedirect.aspx?pfcId=FDBK33583
>>>
>>> Excelent !
>>>
>>> I was still getting this problem with boost 1.44, so thank you for this
>>> information. Could boost better documented this somewhere ?
>>>
>>> Better yet, could the regex build process start by unsetting this
>>> variable ? Should I report this somewhere ?
>>
>> Do you always get those messages, or only when building a fresh tree for the
>> first time?
> 
> The project pre-build event that I set up unpacks and compiles a boost
> release archive, that I place on source control as part of the project
> files, so I always compile a fresh tree. 

Ah, this explains. Can you arrange for <boost-root>/bin.v2 directory
to be created before you try to build boost. 1.44 has a bug whereby
config log is written to <boost-root>/bin.v2/config.log, but the
directory is not created.

- Volodya