Question

我们正在根据Eigen 3.3.7（可能还有较旧的版本）根据MSYS2提供的最新版本的GCC 8.2.1进行facing errors编译。奇怪的是，这仅在同一软件包的最新版本（mingw-w64-x86_64-gcc 8.2.1）中发生：

8.2.1 + 20181123-1：很好
8.2.1 + 20181130-1：错误
8.2.1 + 20181207-1：错误

错误是：

In file included from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/SparseCore:50,
                 from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/Sparse:26,
                 from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/Eigen:2,
                 from src/registration/transform/search.h:21,
                 from src/registration/transform/initialiser_helpers.cpp:20:
C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/src/SparseCore/SparseBlock.h: In member function 'Eigen::internal::sparse_matrix_block_impl<SparseMatrixType, BlockRows, BlockCols>::BlockType& Eigen::internal::sparse_matrix_block_impl<SparseMatrixType, BlockRows, BlockCols>::operator=(const BlockType&)':
C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/src/SparseCore/SparseBlock.h:216:33: error: expected primary-expression before '>' token
       return operator=<BlockType>(other);

                             ^

我假设这是MSYS2提供的GCC软件包中的错误，而不是Eigen（据我所知SparseBlock.h文件已经有一段时间没有更改了）。不同的GCC是否基于相同的源代码？知道可能是什么问题吗？

编辑：这是MCVE：

test.cpp：

#include <Eigen/Eigen>
int main () { return 0; }

使用g ++ 8.2.1（8.2.1 + 20181130-1版或更高版本-较旧版本没有错误）进行编译：

$ g++ $(pkg-config --cflags eigen3) test.cpp -o test
In file included from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/SparseCore:50,
                 from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/Sparse:26,
                 from C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/Eigen:2,
                 from test.cpp:1:
C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/src/SparseCore/SparseBlock.h: In member function 'Eigen::internal::sparse_matrix_block_impl<SparseMatrixType, BlockRows, BlockCols>::BlockType& Eigen::internal::sparse_matrix_block_impl<SparseMatrixType, BlockRows, BlockCols>::operator=(const BlockType&)':
C:/Users/donald/msys64/mingw64/include/eigen3/Eigen/src/SparseCore/SparseBlock.h:216:33: error: expected primary-expression before '>' token
       return operator=<BlockType>(other);
                                 ^

Answer 1

进一步的调查表明这确实是一个GCC错误。我已经reported this on GCC Bugzilla，并且我将关闭此线程。谢谢！

MSYS2上gcc 8.2.1的本征编译错误

1 个答案: