Static igraph libraries for R packages

Environment	Status
BioC-release
BioC-devel

Builds the igraph 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:

to the DESCRIPTION, and setting:

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 by running tools/igraph_download.sh.