On 10/17/2017 12:13 AM, Jan Ekstrom wrote:
On Tue, Oct 17, 2017 at 12:38 AM, Hendrik Leppkes <h.lepp...@gmail.com> wrote:
Perhaps such libraries shouldn't hardcode -lstdc++ in there, but
dynamically put whichever C++ library they built against in there
instead?
Its not like you can actually use a static library build with another
C++ library, that *may* randomly work, but its not something anyone
should be doing.
- Hendrik
Yup,
The project should know which C++ runtime it is built against and put
that into the .pc file's Libs.private. If the project doesn't have an
idea on how to automate this, a solution like the one utilized by zimg
is valid as well:
* Check for an environment variable during configuration and set the
default to `-lstdc++`
(https://github.com/sekrit-twc/zimg/blob/ae673e02c8e934915e05daeb120c7cb1b500a0a4/configure.ac#L55..L56)
* Set that value in your pkg-config template
(https://github.com/sekrit-twc/zimg/blob/ae673e02c8e934915e05daeb120c7cb1b500a0a4/zimg.pc.in#L13)
As already explained in another mail, I actually have no idea how to
reliably determine the name of the C++ standard library. (see
https://lists.freedesktop.org/archives/pkg-config/2016-August/001055.html
on the pkg-config mailing list for a similar discussion).
Do you happen to know of any other libraries that do exactly that (use
of STL_LIBS variable)? If this is somewhat common practice I could add
support for that variable to libopenmpt.
If it is not, I am considering adding a configure option to libopenmpt,
something like "--pkgconfig-static-cxxstdlib=-lstdc++" (and also add
proper documentation about this issue with static linking).
However I do not like defaulting it to some guess (libstdc++), as a
wrong value here is worse than no value (additional libs can be added
easily by libraries or programs that use libopenmpt, removing/ignoring
wrong libs from the .pc file is harder and will cause even more trouble).
For reference: https://bugs.openmpt.org/view.php?id=1045 (libopenmpt issue)
Regards,
Jörn (libopenmpt maintainer)
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