Leon Rom posted a comment on discussion OCILIB troubleshooting (ReadOnly - Use GitHub tracker instead)

I have had similar situation... Using "./configure --with-oracle-headers-path=..." solve my problem (not --with-oracle-home) You have exactly check values of all 'ORACLE's variables by executing: echo $ORACLE_HOME echo $LD_LIBRARY_PATH echo $PATH and INCLUDE-path, reffered by key --with-oracle-home! (one of my errors was long-defis substituted by editor instead of --). Please, read carefully man for ./configure and http://vrogier.github.io/ocilib/doc/html/group___ocilib_c_api_installation.html