Avoid extra test dependencies in RHEL builds

These extra dependencies are only used to test optional integration with
these libraries, and are otherwise unnecessary or unwanted in RHEL.
This is based on c9s:

8d601598fa

eigen3.spec

@@ -13,15 +13,16 @@
 %global cmake_blas_flags -DBLAS_LIBRARIES=%{_libdir}/lib%{blaslib}%{blasvar}.so
 %endif
 
-%if 0%{?rhel}
+%bcond mingw %{undefined rhel}
-%bcond_with mingw
+%bcond sparsehash %{undefined rhel}
-%else
+%bcond suitesparse %{undefined rhel}
-%bcond_without mingw
+%bcond SuperLU %{undefined rhel}
-%endif
+%bcond scotch %{undefined rhel}
+%bcond metis %{undefined rhel}
 
 Name:           eigen3
 Version:        3.4.0
-Release:        9%{?dist}
+Release:        10%{?dist}
 Summary:        A lightweight C++ template library for vector and matrix math
 
 License:        MPL-2.0 AND LGPL-2.0-or-later AND BSD-3-Clause AND Minpack
@@ -36,12 +37,22 @@ BuildRequires:  glew-devel
 BuildRequires:  gmp-devel
 BuildRequires:  gsl-devel
 BuildRequires:  mpfr-devel
-BuildRequires:  sparsehash-devel
-BuildRequires:  suitesparse-devel
 BuildRequires:  gcc-gfortran
+%if %{with sparsehash}
+BuildRequires:  sparsehash-devel
+%endif
+%if %{with suitesparse}
+BuildRequires:  suitesparse-devel
+%endif
+%if %{with SuperLU}
 BuildRequires:  SuperLU-devel
+%endif
+%if %{with scotch}
 BuildRequires:  scotch-devel
+%endif
+%if %{with metis}
 BuildRequires:  metis-devel
+%endif
 
 BuildRequires:  cmake
 BuildRequires:  make
@@ -118,9 +129,15 @@ BuildArch:      noarch
     -DINCLUDE_INSTALL_DIR=%{_includedir}/%{name} \
     -DCMAKEPACKAGE_INSTALL_DIR=%{_datadir}/cmake/%{name} \
     %{cmake_blas_flags} \
+%if %{with SuperLU}
     -DSUPERLU_INCLUDES=%{_includedir}/SuperLU \
+%endif
+%if %{with scotch}
     -DSCOTCH_INCLUDES=%{_includedir} -DSCOTCH_LIBRARIES="scotch" \
+%endif
+%if %{with metis}
     -DMETIS_INCLUDES=%{_includedir} -DMETIS_LIBRARIES="metis" \
+%endif
     -DEIGEN_TEST_CXX11=ON
 
 %cmake_build
@@ -175,6 +192,9 @@ MINGW64_CMAKE_ARGS="-DINCLUDE_INSTALL_DIR=%{mingw64_includedir}/%{name} -DCMAKEP
 
 
 %changelog
+* Thu Jun 15 2023 Yaakov Selkowitz <yselkowi@redhat.com> - 3.4.0-10
+- Avoid extra test dependencies in RHEL builds
+
 * Thu Jan 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.4.0-9
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild