make fails with reference errors

[SebiTimeWaster]

on make i get these (more than i pasted here):

/usr/bin/ld: usrp_source.cc:(.text+0x3c3): undefined reference to `rtlsdr_get_device_name'
/usr/bin/ld: usrp_source.cc:(.text+0x3fe): undefined reference to `rtlsdr_get_device_name'
/usr/bin/ld: usrp_source.cc:(.text+0x42a): undefined reference to `rtlsdr_open'
/usr/bin/ld: usrp_source.cc:(.text+0x440): undefined reference to `rtlsdr_set_sample_rate'
/usr/bin/ld: usrp_source.cc:(.text+0x44d): undefined reference to `rtlsdr_reset_buffer'
/usr/bin/ld: usrp_source.cc:(.text+0x482): undefined reference to `rtlsdr_reset_buffer'

i have "rtl-sdr" and "librtlsdr-dev" installed, configure runs ok, i have no clue what causes this. I'm on Kubuntu 19.04

[viraptor]

Thanks for the notice.
It looks like the package resolver in autoconf doesn't quite work as expected. The compile command ends up being:

g++  -I/ ... -lfftw3 -L -lrtlsdr -lrt 

Which is both weird for -I and invalid for -L.

It looks like an upstream packaging issue:

root@6eedf8391cfd:/kalibrate-rtl# pkg-config --libs librtlsdr
-L -lrtlsdr
root@6eedf8391cfd:/kalibrate-rtl# pkg-config --cflags librtlsdr
-I/

[viraptor]

Raised upstream in https://bugs.launchpad.net/ubuntu/+source/rtl-sdr/+bug/1831387

I can't really hack this to work in a reasonable way on this side. (unless anyone's got some idea?)

[SebiTimeWaster]

It's not a problem, i can wait. thanks for finding the issue that fast!

[MatsA]

Hi !

On Raspberry Pi !!

Picking the file /usr/lib/arm-linux-gnueabihf/pkgconfig/librtlsdr.pc from a Stretch install this made it work on Buster.

Edit the file so it looks like this

prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib/arm-linux-gnueabihf
includedir=${prefix}/includ

Name: RTL-SDR Library
Description: C Utility Library
Version: 0.6.0
Cflags: -I${includedir}/
Libs: -L${libdir} -lrtlsdr
Libs.private: -lusb-1.0