dnl exception.
AC_CHECK_FUNCS([daxpy_ saxpy_ dgemv_ sgemv_ dgeev_ sgeev_ dgeevx_ sgeevx_])
-AC_CHECK_FUNCS([dgesvd_ sgesvd_ dgemm_ sgemm_ dgetrf_ sgetrf_ dgetri_ sgetri_])
+AC_CHECK_FUNCS([dgemm_ sgemm_ dgetrf_ sgetrf_ dgetri_ sgetri_])
AC_CHECK_FUNCS([dgeqrf_ sgeqrf_ dormqr_ sormqr_ dorgqr_ sorgqr_ dtrtrs_ strtrs_])
-AC_CHECK_FUNCS([dgetrs_ sgetrs_ dstev_ sstev_ dsygv_ ssygv_ dgelsd_ sgelsd_])
+AC_CHECK_FUNCS([dgetrs_ sgetrs_ dstev_ sstev_ dsygv_ ssygv_])
+dnl Singular value decomposition
+AC_CHECK_FUNCS([dgesvd_ sgesvd_ dgesdd_ sgesdd_ dgelsd_ sgelsd_])
dnl -------------------------------------------------------------
dnl set include paths of several libraries
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