Compiling PHP4

Please help me understand following options when compiling PHP with Apache 1. --enable-inline-optimization: Is this recommended? Is this experimental? 2. --with-zlib: Why would one need this and does it take up more space? If it is in /usr/local/lib/libz or something, is the option --with-zlib=/usr/local ? 3. --with-mysql: I am having problems including libs from mysql. Lets say MySQL is in /opt/mysql, do I do --with-mysql=/opt/mysql or --with-mysql=/opt ??? Also, are these libs dynamically or statically linked? What about --with-mysql, are the libs included statically linked ? Which option would reduce the size of the executable? 4. What the heck is pear? How much space does it take in an executable 5.--disable-debug: Does this reduce error reporting produced by PHP when functions fail and errors are produced? On sun, sometime php fail without any error being produced. Does this effect this? How much space would this save?