PHP doesn't find PDFLib functions

I don't succeed in building PHP 4.0.6 with PDFLib 4.0.1 I've installed the PDFLIB 4.01 source in <pdflib-dir>, run ./configure, make and make install. Then, as specified in <pdflib-dir>/bind/php/readme.txt, I've copied <pdflib-dir>/bind/php/ext/pdf/* in <php-dir>/ext/pdf and build php with ./configure --with-pdflib=/usr/local, make and make install I got no errors, but PHP doesn't recognize any PDF functions (Call to undefined function: pdf_new()) I tried to change the --with-pdflib value, with <pdflib-dir>/bind/c or junk directories, it doesn't change anything (No error, but no PDF functions) php -m doesn't say anything about pdf. I didn't notice anything important in config.log What can be wrong, How to know what pdflib library file php is looking for ? My php configure line is ./configure --with-pdflib=/usr/local --enable-safe-mode=yes --enable-discard -path=yes