On SUSE use __builder flag to switch to Ninja

Signed-off-by: Egbert Eich <eich@suse.com>

rocsolver.spec

@@ -56,9 +56,11 @@
 %endif
 
 %if %{with ninja}
-%global cmake_generator -G Ninja
+%if 0%{?suse_version}
+%define __builder ninja
 %else
-%global cmake_generator %{nil}
+%global cmake_generator -G Ninja
+%endif
 %endif
 
 # export an llvm compilation database
@@ -72,7 +74,7 @@
 
 Name:           %{rocsolver_name}
 Version:        %{rocm_version}
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Next generation LAPACK implementation for ROCm platform
 Url:            https://github.com/ROCm/rocSOLVER
 
@@ -240,7 +242,7 @@ if [ "$LINK_JOBS" -lt "$JOBS" ]; then
     JOBS=$LINK_JOBS
 fi
 
-%cmake %{cmake_generator} \
+%cmake %{?cmake_generator} \
     -DCMAKE_CXX_COMPILER=hipcc \
     -DCMAKE_C_COMPILER=hipcc \
     -DCMAKE_LINKER=%rocmllvm_bindir/ld.lld \
@@ -294,6 +296,9 @@ fi
 %endif
 
 %changelog
+* Sun Aug 10 2025 Egbert Eich <eich@suse.com> - 6.4.2-4
+- On SUSE use __builder flag to switch to Ninja
+
 * Wed Aug 6 2025 Tom Rix <Tom.Rix@amd.com> - 6.4.2-3
 - Default build type RelWithDebInfo