Metis warning

[Frank Dellaert]

@amelim, @cbeall3 When compiling on Mac w Clang, I get

[ 10%] Building C object gtsam/3rdparty/metis-5.1.0/libmetis/CMakeFiles/metis.dir/__/GKlib/b64.c.o
warning: unknown warning option '-Wunused-but-set-variable'; did you mean '-Wunused-const-variable'? [-Wunknown-warning-option]

[Andrew Melim]

I don't have a way to verify/fix this since I have no Mac, changing the assignment to Chris

[Frank Dellaert]

Who added the '-Wunused-but-set-variable' option, though?

[Andrew Melim]

Looks like I did, but I think that commit was done at the request of Vadim in person.

[Chris Beall]

This flag was new in GCC 4.6 http://gcc.gnu.org/gcc-4.6/porting_to.html

Fixed in commit 0704e82