Re: [Lapackpp-devel] Help me: syntax errors from "COMPLEX" in Lapack++

[mohamad c. <moh...@in...>]

Thank you Christian,
I follow your advices and i began reading some tutorials about "automake=20
and autoconf". It will be very helpful for me if you can send me an=20
example of a configure.ac file and a Makefale.am which use the lapack++=20
library.
Thank you again and again...

Christian Stimming a =E9crit :

> mohamad chaitou schrieb:
>
>> The compile command i have used is very simple (maybe stupid) because=20
>> i don't know how to deal with dependencies between these files!
>> here its:
>
>
> C++ doesn't work this way, or in other words not that simple. You need=20
> to get a textbook about how to use a C++ compiler, especially how to
> 1. specify the directories to find the header files,
> 2. specify the libraries to link against, and
> 3. specify the directories where to find the libraries to link against.
>
> This is not a lapack++ problem but a general problem of how to write a=20
> C++ program that uses other libraries.
>
>> g++ -Wall -c tEigSolve.cc
>
>
> In this case you are missing the specification of where to find=20
> lapackpp's header files, which would usually look like this
>
> g++ -I/usr/include/lapackpp -c tEigSolve.cc
>
> Apart from this problem, this step obviously worked. This step is=20
> called "compiling" and if you report a bug, it is important to note=20
> the the "compiling" went ok.
>
>> g++ tEigSolve.o
>
>
> This other step obviously gave you errors. This step is called=20
> "linking", so you got "linker errors". The point is that your c++=20
> program uses extra libraries (lapack++'s libraries in this case), and=20
> you must tell the linker which libraries to use and where to find it.=20
> For example
>
> g++ -L/usr/lib -llamatrix++ -llapack++ -lblas++ -llapack -lblas=20
> tEigSolve.o
>
> However, usually you don't call the compiler by hand. Instead, you use=20
> some Makefile which contains the compiler commands (see "info make" on=20
> your system). And even further, you don't even write the Makefile by=20
> hand, but you have them generated by automake and autoconf (see "info=20
> automake" and "info autoconf"). In that case, autoconf is configured=20
> by a top-level file called "configure.in" or "configure.ac", and=20
> configuration for Lapack++ use can be done through the macro=20
> ACX_LAPACKPP which is included in the filename acx_lapackpp.m4. That's=20
> how we are using this in our package simthetic-mimolib=20
> http://cvs.sourceforge.net/viewcvs.py/simthetic/mimolib/
>
> Christian
>
>
>