Re: [libvirt] version script and non-existent symbols
On Sat, Dec 13, 2008 at 05:03:33PM +0000, John Levon wrote:
The current version script refers to symbols that don't exist in the
code. What is the purpose of this? The Solaris linker (quite correctly,
I think) generates hanging references to such symbols.
That's a bug - can you tell me which you see as missing. We can
just remove them.
But there is another more basic problem. If I configure out various
components, such as storage, which is necessary in order to compile,
then /those/ symbols don't exist, and the build fails as above.
I think the solution to the latter is to provide stubs that return
failure codes for every symbol that can be ./configured out. So we'd
introduce a stubs.c file that has these for everything, and compile each
of the stubs if the relevant WITH_ option isn't set.
I think I'd be more inclined to split up the libvirt_sym.version.in
file into pieces, one providing all the public API symbols, which
would never change. Then for all the private symbols have them in
a file matching the source file, eg for domain_conf.h, have a file
domain_conf.sym. Finally have a rule to merge all the .sym files
using the same #ifdef as we use to turn on/off various files
eg,
libvirt_SYMBOLS = libvirt_public.sym
if WITH_XEN
libvirt_SYMBOLS += xen_internal.sym xend_internal.sym
endif
if WITH_STORAGE
libvirt_SYMBOLS += storage_conf.sym
end
Finally, C-style comments aren't supported with the Solaris
linker.
Since both linkers support # as a comment delimiter, any objections to
changing it to do that?
Fine by me. # is nicer anyway because you don't have to remember
to terminate it :-)
Daniel
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