Public bug reported:
On a fresh install of ubuntu (any version), installing libgeos-dev is
not enough to compile any program using this library with static
linkage. The main problem is that libgeos depends on libgeos++. If
dynamic linking is used, everything is fine since:
> ldd /usr/lib/x86_64-linux-gnu/libgeos_c.so
linux-vdso.so.1 (0x00007ffca45f6000)
libgeos-3.9.0.so => /lib/x86_64-linux-gnu/libgeos-3.9.0.so
(0x00007ff637841000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007ff637628000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff63743c000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007ff637421000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ff6372d3000)
/lib64/ld-linux-x86-64.so.2 (0x00007ff637a78000)
So libgeos_c.so brings in libgeos symbols, too.
If static linkage is used, this does not happen, but a link error
occurs.
In fact,
> geos-config --static-clibs
-L/usr/lib/x86_64-linux-gnu -lgeos_c -lgeos -lm
But:
> dpkg-query -L libgeos-dev
/.
/usr
/usr/bin
/usr/bin/geos-config
/usr/include
/usr/include/geos
/usr/include/geos/export.h
/usr/include/geos_c.h
/usr/lib
/usr/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu/libgeos_c.a
/usr/share
/usr/share/doc
/usr/share/doc/libgeos-dev
/usr/share/doc/libgeos-dev/AUTHORS
/usr/share/doc/libgeos-dev/NEWS.gz
/usr/share/doc/libgeos-dev/README.Debian
/usr/share/doc/libgeos-dev/README.md.gz
/usr/share/doc/libgeos-dev/copyright
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/geos-config.1.gz
/usr/lib/x86_64-linux-gnu/libgeos_c.so
/usr/share/doc/libgeos-dev/NEWS.Debian.gz
/usr/share/doc/libgeos-dev/changelog.Debian.gz
and:
> dpkg-query -L libgeos++-dev | grep libgeos
/usr/lib/x86_64-linux-gnu/libgeos.a
/usr/share/doc/libgeos++-dev
/usr/share/doc/libgeos++-dev/copyright
/usr/lib/x86_64-linux-gnu/libgeos.so
/usr/share/doc/libgeos++-dev/NEWS.Debian.gz
/usr/share/doc/libgeos++-dev/changelog.Debian.gz
As you can see, no 'libgeos.a' can be found in libgeos-dev, since it is
part of lbgeos++-dev, which is not part of the libgeos-dev dependencies
anymore (it was!). For this reason, any compilation attempt using the
result of `geos-config --static-clibs` will fail with:
/usr/bin/ld: cannot find -lgeos
collect2: error: ld returned 1 exit status
Marco
** Affects: geos (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1933104
Title:
Static linking is broken on C interface
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/geos/+bug/1933104/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
