Move compiler tests before OBJEXT/EXEEXT/LIBTOOL macros to solve the cause of the failing C preprocessor macro (/lib/cpp).
Move compiler tests before OBJEXT/EXEEXT/LIBTOOL macros to solve the
cause of the failing C preprocessor macro (/lib/cpp).

Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D,Alexpux/Coin3D