Dynamic libraries by default and GHC 7.8

Simon Marlow marlowsd at gmail.com
Thu Nov 29 09:29:11 CET 2012

On 28/11/12 23:15, Johan Tibell wrote:
> What does gcc do? Does it link statically or dynamically by default?
> Does it depend on if it can find a dynamic version of libraries or
> not?

If it finds a dynamic library first, it links against that.

Unlike GHC, with gcc you do not have to choose at compile-time whether 
you are later going to link statically or dynamically, although you do 
choose at compile-time to make an object for a shared library (-fPIC is 

When gcc links dynamically, it assumes the binary will be able to find 
its libraries at runtime, because they're usually in /lib or /usr/lib. 
Apps that ship with their own shared libraries and don't install into 
the standard locations typically have a wrapper script that sets 
LD_LIBRARY_PATH, or they use RPATH with $ORIGIN (a better solution).


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