base (version 3.4.1)

extSoftVersion: Report Versions of Third-Party Software


Report versions of (external) third-party software used.





A named character vector, currently with components


The version of zlib in use.


The version of bzlib (from bzip2) in use.


The version of liblzma (from xz) in use.


The version of PCRE in use.


The version of ICU in use (if any, otherwise "").


The version of libtre in use.


The implementation and version of the iconv library in use (if known).


The version of readline in use (if any, otherwise "").


Name of the binary/executable file with the implementation of BLAS in use (if known, otherwise "").

Note that the values for bzlib and pcre normally contain a date as well as the version number, and that for tre includes several items separated by spaces, the version number being the second.

For iconv this will give the implementation as well as the version, for example "GNU libiconv 1.14", "glibc 2.18" or "win_iconv" (which has no version number).

The name of the binary/executable file for BLAS can be used as an indication of which implementation is in use. Typically, the R version of BLAS will appear as (libR.dylib), R or (libRblas.dylib), depending on how R was built. Note that (libRblas.dylib) may also be shown for an external BLAS implementation that had been copied, hard-linked or renamed by the system administrator. For an external BLAS, a shared object file will be given and its path/name may indicate the vendor/version. The detection does not work on Windows.


The reports the versions of third-party software libraries in use. These are often external but might have been compiled into R when it was installed.

With dynamic linking, these are the versions of the libraries linked to in this session: with static linking, of those compiled in.

See Also

libcurlVersion for the version of libCurl.

La_version for the version of LAPACK in use.

La_library for binary/executable file with LAPACK in use.

grSoftVersion for third-party graphics software.

tclVersion for the version of Tcl/Tk.

pcre_config for PCRE configuration options.


Run this code
## the PCRE version
sub(" .*", "", extSoftVersion()["PCRE"])

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