g-ir-scanner warns about _FORTIFY_SOURCE when building from Git

I was trying to build Gnome-Maps using gnome-builder but I'm unable to do so because the module gnome-online-accounts wont build. The build stops with warnings like :

/usr/include/features.h:381:4: error: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Werror=cpp] and since -Werror parameter is used, these warnings act like errors. The build log is attached[gnome-online-account-buildlog](/uploads/db2f549b8a21f378c11096a5272a5b88/gnome-online-account-buildlog)