error instant client PHP configure script

Hi List Is my first time that I write to this list. I am having problems to compile php with oci support. I run this: ../configure --prefix=/usr/local/php --with-xmlrpc --with-apxs2=/usr/local/apache2/bin/apxs --with-config-file-path=/usr/local/php/etc --with-gd=/usr/ --with-jpeg-dir=/usr --with-png-dir=/usr --with-freetype-dir=/usr --with-xpm-dir=/usr --with-zlib=/usr --with-oci8=instantclient,/opt/instantclient --with-pdo-oci=instantclient,/opt/instantclient,11.1 --with-openssl-dir=/usr --with-iconv=/usr/local --with-curl=/usr --with-curlwrappers --with-libxml-dir=/usr --with-gettext=/usr --enable-sigchild --enable-libxml --enable-soap And I receive alert at finish of ./configure and I see the debug.log with this at the end: conftest.c: In function 'main': conftest.c:3: warning: incompatible implicit declaration of built-in function 'exit' /opt/instantclient/libclntsh.so: file not recognized: File format not recognized collect2: ld returned 1 exit status Thanks for your assistance -- Angel