Le 23/06/2022 à 04:07, Roberto Spadim a écrit :
Hi folks
I have a .xz file and need to read it and "convert" to a DataFrame using
Rcpp if possible.
But... I'm with a problem (first time testing this) using liblzma with
Rcpp, I already know how to do this with CMakeLists.txt, but I don't
know how to do with RCpp
Anyone have an idea?
You have to use Makevars file, either in src/ or in $HOME/.R/ dir.
In this file you have to add something like:
PKG_CPPFLAGS += -I<dir_where_lzma.h_leaves>
PKG_LDFLAGS += -L<dir_where_liblzma.so_lives> -llzma
To make this solution portable, you can want to use configure script
which usage is described in WRE
https://cran.r-project.org/doc/manuals/r-release/R-exts.html#Configure-and-cleanup
Best,
Serguei.
Output from compile time:
> sourceCpp("D:/Trabalho/FTDB-R/FTDB/src/ftdbR.cpp")
/mingw64/bin/g++ -std=gnu++11 -I"C:/PROGRA~1/R/R-41~1.2/include"
-DNDEBUG -I"C:/Users/rspadim/Documents/R/win-library/4.1/Rcpp/include"
-I"D:/Trabalho/FTDB-R/FTDB/src" -I"D:/Trabalho/FTDB-R/FTDB/inst/include"
-O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c
D:/Trabalho/FTDB-R/FTDB/src/xz/xz/decode.cpp -o
D:/Trabalho/FTDB-R/FTDB/src/xz/xz/decode.o
D:/Trabalho/FTDB-R/FTDB/src/xz/xz/decode.cpp:5:10: fatal error: lzma.h:
No such file or directory
#include <lzma.h>
^~~~~~~~
compilation terminated.
make: *** [C:/PROGRA~1/R/R-41~1.2/etc/x64/Makeconf:245:
D:/Trabalho/FTDB-R/FTDB/src/xz/xz/decode.o] Error 1
Error in sourceCpp("D:/Trabalho/FTDB-R/FTDB/src/ftdbR.cpp") :
Error 1 occurred building shared library.
In addition: Warning message:
In normalizePath(path.expand(path), winslash, mustWork) :
path[1]="D:/Trabalho/FTDB-R/FTDB/src/../inst/include": O sistema não
pode encontrar o caminho especificado
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