error while compiling PHP

while compiling PHP if you get the error

configure: error: utf8_mime2text() has new signature, but U8T_CANONICAL is missing

then you need to install

libc-client-devel   package

if you are using a debian/ubuntu pc you need to search for the deb package and if on a redhat or centos or fedora pc then search for the rpm file.

exim + Spool file is locked (another process is handling this message)

 In Exim if you are receiving this error

“Spool file is locked (another process is handling this message)”

There could be many reasons to it,

it may be due to the DNS, or firewall,etc.

We had also faced the same error. and this is how we solved it.

#cd /var/spool/exim4/db

# mv * /backup

(moved all the files to a backup folder)

#/etc/init.d/exim4 restart

And it did the trick,

exim worked, hope it may be useful to you too.