[Rcpp-devel] Help reading libzma file

[Roberto Spadim]

Uhm, yes I see
I testd with package, and linux, it works
But with Windows it don't find the liblzma

Em qui., 23 de jun. de 2022 às 07:59, Dirk Eddelbuettel <edd at debian.org>
escreveu:

>
> On 23 June 2022 at 10:05, Serguei Sokol wrote:
> | 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")
>
> And you want to look into using a package, not `sourceCpp()` which is
> designed for more one-off interactive work.
>
> You can start a package with the `Rcpp.package.skeleton()` function, and
> then
> add a src/Makevars as correctly suggested by Serguei.  There are also many
> example Rcpp on CRAN, GitHub and other places to look at.  The `qs` and
> `fst`
> packages both cover compression too (but do a lot more...), I can't right
> now
> think of a simpler package adding just one compressor but there may well
> be one.
>
> Regards, Dirk
>
> | > /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
> | >
> | >
> | > _______________________________________________
> | > Rcpp-devel mailing list
> | > Rcpp-devel at lists.r-forge.r-project.org
> | >
> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
> |
> | _______________________________________________
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> --
> dirk.eddelbuettel.com | @eddelbuettel | edd at debian.org
>


-- 
Roberto Spadim
SPAEmpresarial - Software ERP/Scada
Eng. Automação e Controle, Eng. Financeira
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