Disable OpenCV on riscv64 until fixed upstream

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

highfive.spec

@@ -37,7 +37,7 @@ Feature support:
 
 Name:           highfive
 Version:        2.3.1
-Release:        %autorelease
+Release:        %autorelease -e 0.riscv64
 Summary:        Header-only C++ HDF5 interface
 
 License:        Boost
@@ -66,7 +66,7 @@ BuildRequires:  ninja-build
 # Optional but included in Fedora, so we use these
 BuildRequires:  cmake(eigen3)
 BuildRequires:  cmake(xtensor)
-%ifnarch %{arm32}
+%ifnarch %{arm32} riscv64
 BuildRequires:  cmake(opencv)
 %endif
 # The -static versions are required by guidelines for tracking header-only
@@ -118,7 +118,7 @@ CXXFLAGS="${CXXFLAGS} -Wno-deprecated-declarations"
     -DHIGHFIVE_USE_BOOST:BOOL=TRUE \
     -DHIGHFIVE_USE_XTENSOR:BOOL=TRUE \
     -DHIGHFIVE_USE_EIGEN:BOOL=TRUE \
-%ifnarch %{arm32}
+%ifnarch %{arm32} riscv64
     -DHIGHFIVE_USE_OPENCV:BOOL=TRUE \
 %endif
     -DHIGHFIVE_EXAMPLES:BOOL=TRUE \