[Boost-users] Réf. : Re: problems linking boost_date_time

From: jerome.wacongne_at_[hidden]
Date: 2008-01-17 03:29:24

That was the exact problem.
I could have spent days to find out this (I am new to C++ and such  tricky 
things weren't in my book)

Thank you for your efficient help !

Internet 
raulh39_at_[hidden]
Envoyé par : boost-users-bounces_at_[hidden]
16/01/2008 21:05
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Re: [Boost-users] problems linking boost_date_time

On Tue, 15 Jan 2008 21:47:39 +0100
jerome.wacongne_at_[hidden] wrote:

> Hi, 
> 
> Here is what I get when I try to link my unit tests agains 
> boost_date_time. 
> 
> g++ -LC:\dev\workspace\fxoverlayFundation\Debug 
> -LC:\dev\workspace\fxoverlayBusiness\Debug 
-LC:\dev\boost_1_34_1\stage\lib 
> -ofxoverlayBusinessTests.exe emptyTests.o allTests.o InterestRateTests.o 

> InterestCurveTests.o -lboost_date_time-mgw34-d-1_34_1 
> -lboost_unit_test_framework-mgw34-d-1_34_1 -lfxoverlayBusiness 
> -lfxoverlayFundation 
> 
C:\dev\workspace\fxoverlayBusiness\Debug/libfxoverlayBusiness.a(InterestCurve.o): 

> In function 
> `ZSt10_ConstructISt4pairIKSsN3com9fxoverlay8business1
> 2InterestRateEES6_EvPT_RKT0_': ... undefined
> reference to `boost::gregorian::greg_month::as_long_string() const' 
> 

Libraries should be listed (with the -l option) in "ascending order of 
use", that is, if library A uses library B, then library B should be 
listed after A.

The error message says that libfxoverlayBusiness.a uses boost::gregorian, 
that is, libboost_date_time-mgw34-d-1_34_1.a, so 
libboost_date_time-mgw34-d-1_34_1.a should be listed after 
libfxoverlayBusiness.a, but you have listed it before.

So: try to change the order of the "*.o" and "*.a" to make the linker 
happy. ;)

HTH,
Raul.
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