Well, I did find a working fix to apply in debian/rules.
# Add missing math libraray for linking in gphoto2
# (automatic math library linking was dropped by GCC years ago)
export DEB_LDFLAGS_MAINT_APPEND := -lm
I did add as well all available processor cores in parallel build, and
Optimization O3 instead of -O2.
However it would better if upstream would update its own configure.ac
file ...
Here is the portion of the log showing no sign of unresolved
dependencies:
make[1]: Leaving directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
debian/rules override_dh_makeshlibs
make[1]: Entering directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
dh_makeshlibs -plibgphoto2-6 -X/usr/lib/x86_64-linux-gnu/libgphoto2/
dh_makeshlibs -plibgphoto2-port12 -X/usr/lib/x86_64-linux-gnu/libgphoto2_port/
make[1]: Leaving directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
debian/rules override_dh_shlibdeps
make[1]: Entering directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
dh_shlibdeps -ldebian/libgphoto2-6/usr/lib/:debian/libgphoto2-port12/usr/lib/
make[1]: Leaving directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
dh_installdeb -O--parallel
debian/rules override_dh_gencontrol
make[1]: Entering directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
dh_gencontrol
dpkg-gencontrol: warning: Depends field of package libgphoto2-port12-dbgsym:
unknown substitution variable ${shlibs:Depends}
dpkg-gencontrol: warning: Depends field of package libgphoto2-6-dbgsym: unknown
substitution variable ${shlibs:Depends}
dh_gencontrol -plibgphoto2-6 -- -Vudev-hotplug='udev (>= 201)'
make[1]: Leaving directory
'/home/ubuntu-xenial/pascal/Downloads/Launchpad/libgphoto2/libgphoto2-2.5.9'
dh_md5sums -O--parallel
dh_builddeb -O--parallel
It would be nice for Ubuntu to update the build in all supported
releases.
The rebuild will be available in my PPA soon:
https://launchpad.net/~anton+/+archive/ubuntu/photo-video-apps
However beware that this PPA is yet NOT to be added on any system as
it's still unstable and miss some dependencies i.e. if installing a
package you will be faced with a partial upgrade which in turn will
remove some of your already installed apps.
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https://bugs.launchpad.net/bugs/1802674
Title:
libgphoto2 builds lacks a link to the math library in all Ubuntu
releases since at least Xenial 16.04
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