Doug Hardie wrote:
I have encountered something that I do not understand. Everything works fine.
Basically I have a bunch of user modules (low level) that are built into a
dynamic library. If I write top level code that calls modules in that library,
everything works just fine on i386 and AMD64. However, the application
involved has another library of modules. Some of them call modules in the low
level library. The top level code call modules in both libraries. Often when
it calls a module in the mid level library, that module calls several modules
in the low level library.
All this works just fine on i386. However, when I compile everything on AMD64
I get an error message that says the lower level library needs to be compiled
with fPIC. If I add that to the Makefile for the lower level library and
rebuild everything, it all works again. I don't understand why the fPIC is
required for AMD64.
Also, how do I tell if the lower level library is being dynamically linked at
run time, or being directly incorporated into the mid level library or top
level application? Since both of these libraries are quite large, and they are
in use by a number of top level applications, I want just one copy to exist in
physical memory.
This sounds exactly like compiling with clang through ccache. There are
issues with clang and ccache cooperation. Actually the one you may hit
is libtool detecting implicit fPIC requirement when running clang
through ccache.
--
Sphinx of black quartz judge my vow.
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