Question on how do I tell make to choose between static and shared versions of a library
matthew at FreeBSD.org
Sun Dec 16 17:43:00 UTC 2012
On 16/12/2012 17:22, Manish Jain wrote:
> Under /lib I have both versions - shared (libxyz.so.1) as well as static
> (libxyz.a) - of a library. How do I tell make to link to the static
> version, not the shared one ? The next obvious question is how to do the
> vice versa - tell make to link to the shared version, not the static one.
Add -static to the ld command line to produce a staticly linked binary:
this forbids ld(1) from doing any dynamic linking. Otherwise ld will
default to dynamic linking, but fall back to linking staticly against
libraries where there isn't a dynamic shared object available.
Actually, there are about 4 different linker flags you could use that
mean 'produce a staticly linked binary.' They don't have any different
effect; the reason they exist is for historic compatibility with
versions of ld(1) from many different sources.
It's also an all-or-nothing option. If you wanted to use static linkage
for one particular library out of all the libraries used by your
program, then you'ld need a very different command line. But that, as
they say, is left as an exercise for the student.
Dr Matthew J Seaman MA, D.Phil.
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