Visual Studio C++ debug and release configurations

Visual Studio 2019 C++ debug configuration is more forgiving than release. Examples that a debug build allows but release build does not:

enum E {a = 0, b=1};
E r[3] = {0}; //causes "initializing: cannot convert from int to E"

double a = 0;
E d = (E) a; //causes "typecast: cannot convert from double to E"

typedef struct {
    double d[3] {0}; //causes "an in-class initializer is not allowed for a member 
                       of an anonymous union in non-class scope"
} S;


class C {
    double s[3] {0}; //causes "cannot specify explicit initializer for arrays"
}

Therefore, to make sure that the C/C++ code you generated from Simulink model is suitable for building, in your nightly tests, build in release configuration.