Hello
In order to enable operation on 64-bit data, can you please check the box "64-Bit Data Type support (long long and double)" in the "C Language" panel.
This should change the library linked to your application and enable the appropriate sqrt function.
You should also remove th e-slld option from the passthrough section of project settings.
If this s not help can you check in the .map file generated by the linker which is the run time library linked to your project.
CrasyCat