emerge, how to configure packages

[scoy]

i emerged php and i got php-4.2.1-r1

however this did not give me the binary /bin/php, so i looked at the php.net docs and i noticed i have to add "./configure --enable-cli" in order to have the executable built.

how to I append this to "emerge php" ?

i tried to add "myconf=--enable-cgi" to the /var/db/pkg/dev-lang/php-4.2.1-r1/php-4.2.1-r1.ebuild file and then "emerge php" again but the file just get overwritten and my setting lost.

how do i add "./configure --someoption" to any package that i want to emerge?

also if i install from the source, meaning not using "emerge php", then will emerge see my installation?

[cyc]

some things work with the use flag, but dunno about such special things
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[scoy]

well i realized that i needed to add the "--enable-cli" to the ebuild file in /usr/portage/dev-lang/php, not the one in /var/db/pkg.