Restore Android/ARMv7 build fix from
for
#ifndef _LAPACKE_CONFIG_H_
#define _LAPACKE_CONFIG_H_
+// For Android prior to API 21 (no <complex> include)
+#if defined(__ANDROID__)
+#if __ANDROID_API__ < 21
+#define LAPACK_COMPLEX_STRUCTURE
+#endif
+#endif
+
#ifdef __cplusplus
#if defined(LAPACK_COMPLEX_CPP)
#include <complex>
