Compilation with --enable-static exits with:

checking whether libcurl is usable... no
configure: error: Curl library not found

Example:
./configure --prefix=/usr/local/ --bindir=/usr/local/sbin/ --with-mysql=/usr/bin/mysql_config --enable-server --enable-agent --with-net-snmp --with-libcurl --with-openipmi --enable-ipv6

finish with no errors.

./configure --prefix=/usr/local/ --bindir=/usr/local/sbin/ --with-mysql=/usr/bin/mysql_config --enable-server --enable-agent --with-net-snmp --with-libcurl --with-openipmi --enable-ipv6 --enable-static

[...]
checking whether libcurl is usable... no
configure: error: Curl library not found

The issue can be replicated every time on Ubuntu 11.10 x86_64.