How to correct symbol lookup error in MongoDb C client

Question

When I run the hello_mongoc test app (renamed to mongotest), the output looks like this:

{ "ok" : 1 }
./mongotest: symbol lookup error: /usr/local/lib/libmongoc-1.0.so.0: undefined symbol: bson_validate_with_error

The app is build with:

cc -o mongotest mongotest.o -lmongoc-1.0 -lbson-1.0

and gives no compilation warnings/errors.

This is in /usr/local/lib:

lrwxrwxrwx  1 root staff      16 Oct  5 11:38 libbson-1.0.so -> libbson-1.0.so.0
lrwxrwxrwx  1 root staff      20 Oct  5 11:38 libbson-1.0.so.0 -> libbson-1.0.so.0.0.0
-rw-r--r--  1 root staff  549180 Oct  5 11:29 libbson-1.0.so.0.0.0
-rw-r--r--  1 root staff  744738 Oct  5 11:30 libbson-static-1.0.a
lrwxrwxrwx  1 root staff      18 Oct  5 11:38 libmongoc-1.0.so -> libmongoc-1.0.so.0
lrwxrwxrwx  1 root staff      22 Oct  5 11:38 libmongoc-1.0.so.0 -> libmongoc-1.0.so.0.0.0
-rw-r--r--  1 root staff 2162580 Oct  5 11:31 libmongoc-1.0.so.0.0.0
-rw-r--r--  1 root staff 3553982 Oct  5 11:33 libmongoc-static-1.0.a

I am running on a raspberry pi 3B+

Answer 1

According to libbson source, bson_validate_with_error was added in 1.7.0, while you have 1.0.

EDIT 1:

This seems to be a linker issue. More info in comments below.

EDIT 2:

One way of solving this is to use static linking:

gcc -o mongotest mongotest.c $(pkg-config --libs --cflags libmongoc-static-1.0)