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Date:	Sat, 30 Jan 2010 02:42:36 +0000
From:	Greg Chicares <gchicares AT sbcglobal DOT net>
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Subject:	Re: Problems linking--"undefined reference to..."
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On 2010-01-30 01:49Z, Peter Mills wrote:
> 
> g++
>  -I/home/Petey/include -Wno-deprecated -O2  -o model2 model2.cc 
> traj_int_obj.o tcoord_defs.o -L/home/Petey/lib -ldataset-O2 -lpetey 
> -lsparse-O2 -lgsl -lgslcblas
> model2.cc: In function `int main(int, 
> char**)':
[...]
> traj_int_obj.o:traj_int_obj.cc:(.text+0x12): undefined 
> reference to `_mcount'

'_mcount' is used by gprof. If an object file was built with '-pg',
then you need to use '-pg' for linking, too.

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