[Bonmin] how to build a completely static version version of bonmin

[Andreas Waechter]

Hi,

I think the all-static linking issue is still not resolved...

Just for clarification:

On systems there the Makefiles can build shared libraries, those are build 
by default.  If one specifies the --disable-shared flag for configure, no 
shared libraries are built, and instead static ones are generated.  If one 
specifies --enable-shared (and no --disable-shared) then both types of 
libraries are built.  See also 
https://projects.coin-or.org/BuildTools/wiki/user-configure

If one wants to build a completely static version of Bonmin, one would 
have to specify --disable-shared.

Linking everything static seems to be a bit of a hassle.  I got it to work 
now on a 64bit Linux machine, but I had to use some tricks.  At some 
point, we can provide a clean "-enable-all-static-compile" flag for 
configure, but for now, please try the following:

1. Tell the Makefiles, that the '-all-static' flag should be given to 
libtool for linking.  Since this flag is not understood by the compilers 
directly, we have to do that with a little detour, namely by setting the 
environment variable AM_LDFLAGS to that value (which is then picked up 
directly in the Makefiles, but ignored by configure).

Set the environment variable

setenv AM_LDFLAGS '-all-static'  (for [t]csh)

or

export AM_LDFLAGS='-all-static'  (for [ba]sh)

Note, this needs to be done every time in a shell in which 'make' is 
executed!!!

2. Since the configure scripts try to find out the runtime libraries for 
the Fortran compiler automatically, we need to tell the fortran compiler 
that we want to generate static linking.  For the GNU compiler, this is 
done with the '-static' flag.  We can add a flag for the Fortran compiler 
using the ADD_FFLAGS variable.

configure --disable-shared ADD_FFLAGS='-static'

3. At least on the system I was working on, it seems that the libtool file 
libstdc++.la sets the dependency of libstdc++.* to include -lgcc_s, but 
this is incorrect for static linking...  I simply changed the file

/usr/lib64/libstdc++.la

so that the line with dependency_libs reads:

dependency_libs=' -lm -lc'

I had to be root to do that.  This is of course not nice, but for now 
it might be a remedy...

> ../configure -C enable_static=yes enable_shared=no build_old_libs=yes 
> build_libtool_libs=no

BTW, I don't think it is a good idea in general to try to overwrite 
internal configure variables like build_old_libs and build_libtool_libs.

Please give it a try, and at some point I can implement a better generic 
flag for configure.

Hope this helps,

Andreas


>
> followed by make..
>
> however, looking at the output of make, it looks like libgfortran.so is being 
> linked to the solver instead of libgfortran.a:
>
> this is part of the last line of make:
> -L/usr/lib/../lib /usr/lib/libgfortranbegin.a /usr/lib/libgfortran.so -lm 
> -lgcc_s
>
> how can I build a completely static version that has no soft links to any 
> library build in.. I want to do this because I want to run bonmin on a 
> different machine where the library libgfortran is not available at exactly 
> the same place (/usr/lib)
>
> any help regarding this will be highly appreciated...
> thanks..
> Cheers,
> Abhishek.
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