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diff -ru magma-2.3.0/testing/testings.h magma-2.3.0-patched/testing/testings.h
--- magma-2.3.0/testing/testings.h 2017-11-14 21:34:00.000000000 -0800
+++ magma-2.3.0-patched/testing/testings.h 2018-03-23 20:41:16.459934643 -0700
@@ -269,4 +269,20 @@
typename blas::traits<FloatT>::real_t* sigma,
FloatT* A, magma_int_t lda );
+// This overload for the case sigma = nullptr is a workaround for an issue
+// when building with gcc 4.8.5. This is not an issue with gcc 4.9.2.
+template< typename FloatT >
+void magma_generate_matrix(
+ magma_opts& opts,
+ magma_int_t m, magma_int_t n,
+ std::nullptr_t sigma,
+ FloatT* A, magma_int_t lda )
+{
+ magma_generate_matrix<FloatT>(
+ opts,
+ m, n,
+ (typename blas::traits<FloatT>::real_t*) sigma,
+ A, lda );
+}
+
#endif /* TESTINGS_H */
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