Configure issue

[Ludovic Hirlimann]

After getting tot from git, I run autogen.sh which fails because it  
does not find boost.

Afterwards running ./configure --with-darwinports also fails :
checking for jpeglib.h... yes
./configure: line 20023: syntax error near unexpected token `EXEMPI,'
./configure: line 20023: `PKG_CHECK_MODULES(EXEMPI, exempi-2.0 >=  
$EXEMPI_REQUIRED)'

exempi is installed on that machine. Google isn't being helpful so I  
was wondering if anybody had an idea on why configure is failing ?

Ludo