Configuration Settings and Rules

Most Apache users won’t have to bother with this section at all. However, you can specify extra compiler flags (for instance, optimization commands), libraries, or includes by giving values to the following :

EXTRA_CFLAGS=
EXTRA_LDFLAGS=
EXTRA_LIBS=
EXTRA_INCLUDES=

Configure will try to guess your operating system and compiler; therefore, unless things go wrong, you won’t need to uncomment and give values to these:

#CC=
#OPTIM=-02
#RANLIB=

The rules in the Configuration file allow you to adapt for a few exotic configuration problems. The syntax of a rule in Configuration is as follows:

Rule RULE =value

The possible values are as follows:

yes

Configure does what is required.

default

Configure makes a best guess.

Any other value is ignored.

The Rule s are as follows:

STATUS

If yes, and Configure decides that you are using the status module, then full status information is enabled. If the status module is not included, yes has no effect. This is set to yes by default.

SOCKS4

SOCKS is a firewall traversal protocol that requires client-end processing. See http://ftp.nec.com/pub/security/socks.cstc. If set to yes, be sure to add the SOCKS library location to EXTRA_LIBS; otherwise, Configure assumes L/usr/local/lib -lsocks. This allows Apache to make outgoing SOCKS connections, which is not something it normally needs to do, unless it is configured as a proxy. Although the very latest version of SOCKS is SOCKS5, SOCKS4 clients work fine with it. This is set to no by default.

SOCKS5

If you want to use a SOCKS5 client library, you must use this rule rather than SOCKS4. This is set to no by default.

IRIXNIS

If Configure decides that you are running SGI IRIX, and you are using NIS, set this to yes. This is set to no by default.

IRIXN32

Make IRIX use the n32 libraries rather than the o32 ones. This is set to yes by default.

PARANOID

During Configure, modules can run shell commands. If PARANOID is set to yes, it will print out the code that the modules use. This is set to no by default.

There is a group of rules that Configure will try to set correctly, but that can be overridden. If you have to do this, please advise the Apache Group by filling out a problem report form at http://apache.org/bugdb.cgi or by sending an email to Currently, there is only one rule in this group:

WANTHSREGEX:

Apache needs to interpret regular expressions using POSIX methods. A good regex package is included with Apache, but you can use your OS version by setting WANTHSREGEX=no or commenting out the rule. The default action depends on your OS:

Rule WANTSHREGEX=default