highcalcula...@gmail.com wrote:
> I managed to do the following via MinGW:
>
> - run ./configure --disable-static --enable-shared
> - make
> - make check
>
> (Is this all and now I can start using it or is a step missing?...)
You have to run 'make install' as well.
Depending on whether you want to /exclusively/ use MPIR (which is a
drop-in *replacement* of GMP) as opposed to having parallel, independent
installations of both GMP and MPIR, you might consider configuring MPIR
with '--enable-gmpcompat'.
Roughly speaking, the latter just creates aliases for the headers and
libraries, such that you don't have to modify code to switch between
MPIR and GMP, i.e., you can '#include <gmp.h>' and use '-lgmp'
regardless of whether you're actually using GMP or its fork, MPIR.
If you intend to use the C++ layer of GMP/MPIR, you also have to
configure with '--enable-cxx'. This is /not/ necessary if you just want
to use the C interface / library from within C++.
> Now I want to compile the following program called "mytest.cpp" with
> gcc; I tried typing "g++ mytest.cpp -o mytest" :
>
> //-----------------------------------------------
> #include "mpir.h"
> #include "gmp.h"
> #include "gmp-impl.h"
>
> using namespace std;
>
> int main ()
> {
> mpz_t z;
>
> mpz_init(z);
>
> return (0);
> }
> //-----------------------------------------------
You don't have to (and shouldn't) include both mpir.h and gmp.h, nor
gmp-impl.h. (It is sufficient to just include mpir.h, or, in case you
configured with '--enable-gmpcompat', just gmp.h.)
To link your program to the MPIR C library, you have to
g++ mytest.cpp -o mytest -lmpir
(Again, in case you configured MPIR with '--enable-gmpcompat', 'g++
mytest.cpp -o mytest -lgmp' also works.)
-leif
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