# Static igraph libraries for R packages |Environment|Status| |---|---| |[BioC-release](https://bioconductor.org/packages/release/bioc/html/Rigraphlib.html)|[](https://bioconductor.org/checkResults/release/bioc-LATEST/Rigraphlib/)| |[BioC-devel](https://bioconductor.org/packages/devel/bioc/html/Rigraphlib.html)|[](https://bioconductor.org/checkResults/devel/bioc-LATEST/Rigraphlib/)| Builds the [**igraph**](https://igraph.org) static library for use in R/Bioconductor packages. This is primarily intended for R packages that wrap other C/C++ libraries that depend on the **igraph** C library and cannot easily be modified to use the usual **igraph** R package. By vendoring in the source code, we reduce our susceptibility to out-of-release-schedule changes in results due to **igraph** updates. It also allows developers to access functionality that might yet not be available from the R bindings. For downstream package developers, use of **Rigraphlib** is as simple as adding: ``` Imports: Rigraphlib ``` to the `DESCRIPTION`, and setting: ```bash RIGRAPH_FLAGS=$(shell "${R_HOME}/bin${R_ARCH_BIN}/Rscript" -e 'Rigraphlib::pkgconfig("PKG_CPPFLAGS")') PKG_CPPFLAGS=$(RIGRAPH_FLAGS) RIGRAPH_LIBS=$(shell "${R_HOME}/bin${R_ARCH_BIN}/Rscript" -e 'Rigraphlib::pkgconfig("PKG_LIBS")') PKG_LIBS=$(RIGRAPH_LIBS) $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) ``` in the `src/Makevars`. We use R's own BLAS and LAPACK libraries to avoid redundant recompilation of **igraph**'s vendored copies. We can update the vendored copy of the source code with: ```bash VERSION=0.10.15 url=https://github.com/igraph/igraph/releases/download/${VERSION}/igraph-${VERSION}.tar.gz curl -L ${url} > sources.tar.gz ```