Eliminate CUDA set but unused variable warning
This avoids warnings such as
D:\a\ceres-solver\ceres-solver\internal\ceres\cuda_kernels_bsm_to_crs.cu.cc(143): warning #550-D: variable "row_nnz_e" was set but never used [D:\a\ceres-solver\ceres-solver\build_Release\internal\ceres\ceres_cuda_kernels.vcxproj]
int row_nnz_e = 0;
^
detected during instantiation of "void ceres::internal::RowBlockIdAndNNZ(int, int, int, const int *, const ceres::internal::Cell *, const ceres::internal::Block *, const ceres::internal::Block *, int *, int *, int *) [with partitioned=false]" at line 240
Remark: The warnings can be suppressed with "-diag-suppress <warning-number>"
that is caused by compile-time conditional use of the variable.
Change-Id: I041b076a5208eeb662b8c7500d7b238965be833c
diff --git a/internal/ceres/cuda_kernels_bsm_to_crs.cu.cc b/internal/ceres/cuda_kernels_bsm_to_crs.cu.cc
index b9ca4cd..ee574f0 100644
--- a/internal/ceres/cuda_kernels_bsm_to_crs.cu.cc
+++ b/internal/ceres/cuda_kernels_bsm_to_crs.cu.cc
@@ -140,7 +140,7 @@
const auto& row_block = row_blocks[row_block_id];
auto first_cell = cells + first_cell_in_row_block[row_block_id];
const auto last_cell = cells + first_cell_in_row_block[row_block_id + 1];
- int row_nnz_e = 0;
+ [[maybe_unused]] int row_nnz_e = 0;
if (partitioned && row_block_id < num_row_blocks_e) {
// First cell is a cell from E
row_nnz_e = col_blocks[first_cell->block_id].size;
