Comment 7 for bug 1864920

You were absolutely right with your hint:

pi@autoradio:~ $ cd /usr/lib/arm-linux-gnueabihf
pi@autoradio:/usr/lib/arm-linux-gnueabihf $ ls -al *Geogra*
-rw-r--r-- 1 root root 963526 Jul 31 2018 libGeographic.a
lrwxrwxrwx 1 root root 23 Jul 31 2018 libGeographic.so -> libGeographic.so.17.1.2
lrwxrwxrwx 1 root root 23 Jul 31 2018 libGeographic.so.17 -> libGeographic.so.17.1.2
-rw-r--r-- 1 root root 573228 Jul 31 2018 libGeographic.so.17.1.2
pi@autoradio:/usr/lib/arm-linux-gnueabihf $ cd /usr/lib
pi@autoradio:/usr/lib $ ls -al *Geogra*
-rw-r--r-- 1 root root 1032542 Jul 16 2017 libGeographic.a
lrwxrwxrwx 1 root root 19 Jul 16 2017 libGeographic.so -> libGeographic.so.17
lrwxrwxrwx 1 root root 23 Jul 16 2017 libGeographic.so.17 -> libGeographic.so.17.1.1
-rw-r--r-- 1 root root 673980 Jul 16 2017 libGeographic.so.17.1.1

In my Makefile, /usr/lib is given priority over the other libdirs:

LDFLAGS=-L/usr/lib -L/usr/lib/arm-linux-gnueabihf

Shall I try it out with the libdirs in reverse order?

I upgraded from Jessie to Buster some three weeks ago, and this is when the trouble started.