Hallo Do you or anyone know why is it trying to link with -L/usr/lib64 path and not -L/usr/local/lib as provided? After recompiling the libseal.a with the -fPIC flag and copying it manually from /usr/local/lib/ to /usr/lib64/ I get those errors: g++ -Wl,--no-undefined -shared -o seal_diff_cpp.so seal_diff_cpp.o -L/usr/pgsql-10/lib -L/usr/lib64 -Wl,--as-needed -Wl,-rpath,'/usr/pgsql-10/lib',--enable-new-dtags -L/usr/local/lib -lseal -pthread seal_diff_cpp.o: In function `seal_diff_cpp': /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:106: undefined reference to `pg_detoast_datum_packed' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:107: undefined reference to `pg_detoast_datum_packed' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:108: undefined reference to `pg_detoast_datum_packed' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:112: undefined reference to `text_to_cstring' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:113: undefined reference to `text_to_cstring' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:114: undefined reference to `text_to_cstring' /etc/opt/pgsql_c_functions/CPP/seal_extension/seal_diff_cpp.cpp:130: undefined reference to `cstring_to_text_with_len' Did I miss something in one of my files? Best regards, Tal -- Sent from: http://www.postgresql-archive.org/PostgreSQL-general-f1843780.html