Re: [Paparazzi-devel] Ubuntu 11.10 ivy-ocaml issue & temporary fix

[Felix Ruess]

Hi again,

It seems the problem is not with pcre-config but with new default options to the linker regarding the handling of shared libs (especially the option--as-needed). 
So you have to reorder the libs in the gcc call. But in nearly all cases we don't need to link to libpcre anyway, as it is not directly used.
See https://wiki.ubuntu.com/ToolChain/CompilerFlags#A-Wl.2C--as-needed and https://wiki.ubuntu.com/NattyNarwhal/ToolchainTransition for more details.

I "fixed" this in the dev branch and I've had no problems on Ubuntu 11.04 (natty) and 11.10 (oneiric).
It would be nice if someone could test this on osx and debian as well, then we can merge it into master.

Cheers, Felix

This should be fixed in the dev branch, if these changes don't cause any problems elsewhere we'll merge it into master.

On Fri, Oct 14, 2011 at 8:18 PM, Felix Ruess <address@hidden> wrote:

Hi Gareth,

I just updated on one machine as well, installed your ivy-ocaml package and compiled... seems to be working fine here.
So regarding pcre, while it seems to work here without modifications, still we should probably get rid of pcre-config:
* It probably won't be a problem to directly link again libpcre with -lpcre, this is also done in some other makefiles already
* maybe use pgk-config instead as I said in my earlier mail

What did you mean with pcre-config lies on 11.10, I have that on 11.04 as well as on 11.10
 output of pcre-config --libs on both systems is -L/usr/lib/i386-linux-gnu -lpcre


Cheers, Felix

On Fri, Oct 14, 2011 at 5:58 PM, Gareth Roberts <address@hidden> wrote:

Hi Felix,

I've sent a GH pull request for the Makefile.
However, I suspect it will break everywhere else other than Ubuntu 11.10!
The problem seems to be that pcre-config lies on 11.10 and ld won't follow the symlink - I can try filing an upstream bug?

If anyone has a better idea of a workaround or an LSB_RELEASE specific version please do it; it would be much more useful.

Cheers,
--G

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