Specify this S-function can be called conditionally
Specifies that the S-function can be called conditionally by other blocks. The Simulink® engine uses this option to determine if the S-Function block can be moved into the execution context of the conditionally executed subsystem in which the S-function resides.
See the S-function sdotproduct.c used
in the Simulink model sfcndemo_sdotproduct for
an example.