undefined reference to `pg_snprintf when we upgraded libpq version from 10.3 to 12.3

Hi all,

We upgraded the libpq version from 10.3 to 12.3. Now we are getting following linker error in compilation.

linux64/lib/libPostgreSQLClient.so: undefined reference to `pg_snprintf(char*, unsigned long, char const*, ...)'

When we analyzed it we found following diff in libpq. What could be the solution of this error.

%/postgres/10.3/lib

>nm libpq.a | grep sprint

U sprintf

U sprintf

U sprintf

U sprintf

U sprintf

U sprintf

%:/postgres/12.3/lib >nm libpq.a | grep sprint

U pg_sprintf

U pg_sprintf

U pg_sprintf

U pg_sprintf

Regards

Tarkeshwar