Temporarily disable MMA on ppc64le

eigen3.spec

@@ -27,6 +27,9 @@ Summary:        A lightweight C++ template library for vector and matrix math
 License:        MPLv2.0 and LGPLv2+ and BSD and Minpack
 URL:            http://eigen.tuxfamily.org/index.php?title=Main_Page
 Source0:        https://gitlab.com/libeigen/eigen/-/archive/%{version}/eigen-%{version}.tar.bz2
+# https://bugzilla.redhat.com/show_bug.cgi?id=1996330
+# Temporarily disable EIGEN_ALTIVEC_DISABLE_MMA on PPC64le
+Patch0:         eigen_mma.patch
 
 BuildRequires:  %{blaslib}-devel
 BuildRequires:  fftw-devel
@@ -73,7 +76,10 @@ Developer documentation for Eigen.
 
 
 %prep
-%autosetup -p1 -n eigen-%{version}
+%setup -q -n eigen-%{version}
+%ifarch ppc64le
+%patch0 -p1
+%endif
 
 
 %build

eigen_mma.patch

@@ -0,0 +1,14 @@
+diff -rupN eigen-3.4.0/Eigen/src/Core/arch/AltiVec/MatrixProduct.h eigen-3.4.0-new/Eigen/src/Core/arch/AltiVec/MatrixProduct.h
+--- eigen-3.4.0/Eigen/src/Core/arch/AltiVec/MatrixProduct.h	2021-08-18 22:41:58.000000000 +0200
++++ eigen-3.4.0-new/Eigen/src/Core/arch/AltiVec/MatrixProduct.h	2021-08-22 17:37:23.626427133 +0200
+@@ -28,6 +28,9 @@
+ #endif
+ #endif
+ 
++#define EIGEN_ALTIVEC_DISABLE_MMA
++
++
+ #ifdef __has_builtin
+ #if __has_builtin(__builtin_mma_assemble_acc)
+   #define ALTIVEC_MMA_SUPPORT
+diff -rupN eigen-3.4.0/Eigen/src/Core/util/Macros.h eigen-3.4.0-new/Eigen/src/Core/util/Macros.h