我正在研究markovchain package。开始开发此程序包时，未使用roxygen2记录功能。最近，我更新了使用roxygen2的函数文档。注意：NAMESPACE不会生成roxygen2。它目前正在使用旧的NAMESPACE文件。
当我跑devtools::check()时发生错误！
dyn.load（dllfile）出错：无法加载共享对象 '/home/deepak/Desktop/gsoc/markovchain/src/markovchain.so'：
/home/deepak/Desktop/gsoc/markovchain/src/markovchain.so:undefined 符号： _Z14markovchainFitP7SEXPRECN4Rcpp6StringEbidS2_bdNS1_6MatrixILi14ENS1_15PreserveStorageEEE
我看过其他 SO 帖子，其中一些.so文件丢失，但在我的情况下则不然。
R CMD ldd -r src/markovchain.so
linux-vdso.so.1 => (0x00007fffed77d000)
libblas.so.3 => /usr/lib/libblas.so.3 (0x00007f100a3a7000)
libR.so => /usr/lib/R/lib/libR.so (0x00007f1009d8a000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f1009a85000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f100977f000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f1009569000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f10091a3000)
libgfortran.so.3 => /usr/lib/x86_64-linux-gnu/libgfortran.so.3 (0x00007f1008e89000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f1008c6b000)
libreadline.so.6 => /lib/x86_64-linux-gnu/libreadline.so.6 (0x00007f1008a24000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f10087e6000)
liblzma.so.5 => /lib/x86_64-linux-gnu/liblzma.so.5 (0x00007f10085c4000)
libbz2.so.1.0 => /lib/x86_64-linux-gnu/libbz2.so.1.0 (0x00007f10083b3000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f100819a000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f1007f92000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f1007d8d000)
libgomp.so.1 => /usr/lib/x86_64-linux-gnu/libgomp.so.1 (0x00007f1007b7e000)
/lib64/ld-linux-x86-64.so.2 (0x00007f100abf6000)
libquadmath.so.0 => /usr/lib/x86_64-linux-gnu/libquadmath.so.0 (0x00007f1007941000)
libtinfo.so.5 => /lib/x86_64-linux-gnu/libtinfo.so.5 (0x00007f1007718000)
undefined symbol: _Z14markovchainFitP7SEXPRECN4Rcpp6StringEbidS2_bdNS1_6MatrixILi14ENS1_15PreserveStorageEEE (src/markovchain.so)
devtools::build_win()
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object '/tmp/Rtmp5Aq9Pf/Rinst7f791b0e862f/markovchain/libs/markovchain.so':
/tmp/Rtmp5Aq9Pf/Rinst7f791b0e862f/markovchain/libs/markovchain.so: undefined symbol: _Z14markovchainFitP7SEXPRECN4Rcpp6StringEbidS2_bdNS1_6MatrixILi14ENS1_15PreserveStorageEEE
Error: loading failed
Execution halted
ERROR: loading failed
* removing ‘/tmp/Rtmp5Aq9Pf/Rinst7f791b0e862f/markovchain’
-----------------------------------
ERROR: package installation failed
Error: Command failed (1)