Re: [Boost-users] program_options

From: Mikko Vainio (mivainio_at_[hidden])
Date: 2007-11-12 09:58:58

You must check that the required argument is specified:

if( !varmap.count("a") )
{
    cerr << "Argument 'a' missing!" << endl;
    return 1;
}

/Mikko

swapna wrote:
> How to include all options as mandatory ones.
> ex: test.exe -a "address" -b "BW"
> Both -a and -b should be specified.It is manadatory
> How to make it mandatory using program_options in boost.
> 
> */Benoit Sigoure <tsuna_at_[hidden]>/* wrote:
> 
>     On Nov 12, 2007, at 6:56 AM, brad wrote:
>      > Benoit Sigoure wrote:
>      >> Hello Brad,
>      >>
>      >> On Nov 10, 2007, at 1:10 AM, Brad wrote:
>      >>
>      >>> I am trying to make a package called visual python, but I keep
>      >>> getting
>      >>> this error. I am using fedora 8 and have
>      >>>
>      >>> Linking cvisualmodule.la ...
>      >>> make[1]: *** [cvisualmodule.la] Error 1
>      >>> make[1]: Leaving directory
>     `/home/brad/Download/visual-4.beta16/src'
>      >>> make: *** [all-recursive] Error 1
>      >>>
>      >>> The key reason I get this error is this line right here...
>      >>> /usr/bin/ld: cannot find -lboost_thread
>      >>>
>      >>> I looked online saw that I could try --LDFLAGS-L[path], where
>      >>> path is
>      >>> the path to libboost_thread.so and libboost_thread.a. Those
>      >>> files don't
>      >>> exist on my computer and I have boost-1.34.1-5.fc8 and
>      >>> boost-devel-1.34.1-5.fc8. I did however find
>      >>> /usr/lib/libboost_thread-mt.so,
>      >>> /usr/lib/libboost_thread-mt.so.1.34.1, and /usr/lib/
>      >>> libboost_thread-mt.so.3.
>      >>
>      >> As far as I know (someone correct me if I'm wrong) boost_threads
>      >> always comes in a `-mt' flavor (I think it's obvious why) so you
>      >> must use -lboost_thread-mt instead.
>      >
>      > I did not make the config file for this but I need to install it.
>      > Is there some kind of argument I can pass during configure to fix
>      > this?
> 
>     I don't understand what you mean, which configure are you talking
>     about? The configure of Boost itself or that of the project you're
>     trying build? For Boost, just do a standard install, but since you
>     already have the file /usr/lib/libboost_thread-mt.so, you don't need
>     to worry about that. For the project you're trying to build, if it
>     uses the autotools (that is, its configure script has been generated
>     by autoconf) use ./configure LIBS=-lboost_thread-mt
>     Otherwise, if none of this works, you'll just have to hack the build
>     system of that project so that it uses -lboost_thread-mt where needed.
> 
>     -- 
>     Benoit Sigoure aka Tsuna
>     EPITA Research and Development Laboratory
> 
> 
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-- 
:: Mikko Vainio <mikko.vainio_at_[hidden]> tel + 358 2 215 4600
:: Structural Bioinformatics Laboratory
:: Department of Biochemistry and Pharmacy
:: Abo Akademi University, Tykistokatu 6A, FI-20520 Turku Finland