Start Eclipse with this flag:
--launcher.GTK_version 2
Start Eclipse with this flag:
--launcher.GTK_version 2
By default the float support is disabled.
To enable it, add the linker flag: -u _printf_float
in your project properties:
Properties -> C/C++ Build -> Settings -> MCU GCC Linker -> Miscellaneous -> Linker flags
taken from a post from user rreignier.