wat_array instalation

[baxy]

can anyone install the following library :

Downloads - wat-array - wat_array : a wavelet tree library for myriad array operations - Google Project Hosting

when i install it like this:


tar -zvjf wat_array-0.0.6.tar.bz2
cd wat_array-0.0.6
./waf configure
./waf
sudo ./waf install

#include <iostream>

#include <wat_array/wat_array.hpp>

int main(){

wat_array::WatArray wa;

}

i get the following message:


/tmp/ccsF9ICT.o: In function `main':
wat.cpp.text+0x10): undefined reference to `wat_array::WatArray::WatArray()'
wat.cpp.text+0x1c): undefined reference to `wat_array::WatArray::~WatArray()'
collect2: ld returned 1 exit status

can anyone repeat this and tell me if he/she is receiving the same problem. and maybe knows the solution ??


thank you

baxy

[stahta01]

Did you try linking to the library wat_array?
If the library does not exist you likely need to build it.

Tim S.

[baxy]

ok so i have accidently changed

g++ -L/usr/local/lib -I/usr/local/include -lwat_array -o wat wat.cpp

to

g++ wat.cpp -o wat -L/usr/local/lib -I/usr/local/include -lwat_array

and it is working now. Why is this?? why does the order matter ?

thank you

baxy

[stahta01]

why does the order matter ?

thank you

baxy

Order matter for most linkers.
If object file A needs Object file B then most linkers require B to be after A.
(Some linkers are in the opposite order; I have never used one of those linkers.)
(Some linkers the order does not matter)

Libraries are normally just a collection of object files; this is not always true; but, it is often true.

Tim S.