[Ipopt] Is there an option to disable Matlab interface at configure ?

[martinon]

Hi everyone,

When trying to build ipopt on windows/mingw, the process sometimes gets 
stuck with the Matlab detection:
"checking for Matlab executable extension (MEXSUFFIX)..."

Since we do not use the Matlab interface, is it possible to disable it 
entirely via some configure option ?
(in our case this would be much more convenient than trying to fix the 
matlab installs of our users)

Thanks,
Pierre Martinon