Support compilation without CBLAS

utest/test_extensions/test_izamin.c

@@ -331,6 +331,7 @@ CTEST(izamin, min_idx_in_vec_tail){
    ASSERT_EQUAL(N, index);
 }
 
+#ifndef NO_CBLAS
 /**
  * C API specific test
  * Test izamin by comparing it against pre-calculated values
@@ -623,3 +624,4 @@ CTEST(izamin, c_api_min_idx_in_vec_tail){
    ASSERT_EQUAL(N - 1, index);
 }
 #endif
+#endif