Re: [Gm2] A bit more informed

[Gaius Mulley]

Martin Kalbfuß <address@hidden> writes:

> My further studies has shown that -fshared and -shared are the same.
> Both have no effect when used together with the -c option. They are only
> useful without the -c option and if the object files are already
> compiled. This is a different behavior then gcc has. If there are no
> object files, gcc creates them out of the sources. gm2 needs the
> -fmakeall option to behave like this.
>
> So to create a shared library, the right command line is
>
> ################################################
> gm2 -fshared -fPIC -fmakeall *.mod -o libname.so
> ################################################

Hi Martin,

wouldn't the correct command line be:

#########################################################
gm2 -fshared -fPIC -fmakeall modulename.mod -o libname.so
#########################################################

as -fmakeall creates a Makefile to build modulename and all its
dependents..

>
> or
>
> ################################
> gm2 -c -fPIC *.mod
> gm2 -fshared *.mod -o libname.so
> ################################
>
> And when Each module should be a separate shared object then the way to
> create them is
>
> ########################################################
> for i in *.mod ; do
>       do gm2 -fshared -fPIC -fmakeall $i -o ${i%.*}.so
> done
> ########################################################

I agree

> or
>
> #####################################
> gm2 -c -fPIC *.mod
> for i in *.mod ; do
>       gm2 -fshared $i -o ${i%.*}.so
> done
> #####################################

using wildcards to specify sources in gm2 do not yet work.  I'll look
into how much restructuring the front end driver would require to allow:

gm2 -c -fPIC *.mod


> I think the result of this is what should be in the SO directories.
> Not the relocatables. 

you will need to specify this:

for i in *.mod ; do
   gm2 -c -fPIC ${i}.mod -o SO/`basename ${i} .mod`.o
done


> Finally I THINK I understand the process of creating shared libraries.
> Hopefully :-)

excellent and thanks for the feedback,

regards,
Gaius