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static inline void setRotateFromVectors(float *A, const float *u, const float *v) {
    float lu2 = u[0]*u[0] + u[1]*u[1] + u[2]*u[2];
    float lv2 = v[0]*v[0] + v[1]*v[1] + v[2]*v[2];
    if(lu2*lv2<1.e-10) {
        setIdentity(A);
        return;
    }
    float scaler = 1.0f/sqrtf(lu2*lv2);
 
    float c = (u[0]*v[0] + u[1]*v[1] + u[2]*v[2])*scaler;
 
    float x = (v[1]*u[2] - v[2]*u[1])*scaler;
    float y = (v[2]*u[0] - v[0]*u[2])*scaler;
    float z = (v[0]*u[1] - v[1]*u[0])*scaler;
 
    float s2 = x*x + y*y + z*z;
    if(s2<1.e-10) {
        setIdentity(A);
        return;
    }
    float cs2 = (1.0f-c)/s2;
    A[ 0] = c+x*x*cs2;   A[ 4] = x*y*cs2+z;   A[ 8] = x*z*cs2-y;   A[12] = 0;
    A[ 1] = x*y*cs2-z;   A[ 5] = c+y*y*cs2;   A[ 9] = y*z*cs2+x;   A[13] = 0;
    A[ 2] = x*z*cs2+y;   A[ 6] = y*z*cs2-x;   A[10] = c+z*z*cs2;   A[14] = 0;
    A[ 3] = 0;           A[ 7] = 0;           A[11] = 0;           A[15] = 1;
}

prog.c: In function ‘setRotateFromVectors’:
prog.c:5:9: error: implicit declaration of function ‘setIdentity’ [-Werror=implicit-function-declaration]
         setIdentity(A);
         ^
prog.c:8:5: error: implicit declaration of function ‘sqrtf’ [-Werror=implicit-function-declaration]
     float scaler = 1.0f/sqrtf(lu2*lv2);
     ^
prog.c:8:25: error: incompatible implicit declaration of built-in function ‘sqrtf’ [-Werror]
     float scaler = 1.0f/sqrtf(lu2*lv2);
                         ^
cc1: all warnings being treated as errors

Standard output is empty