cairo: The cairo version string.
libpng: The png version string.
jpeg: The jpeg version string.
tiff: The tiff library and version string used.
tcl: The tcl version string.
curl: The curl version string.
zlib: The zlib version string.
bzlib: The zlib version string.
xz: The zlib version string.
PCRE: The Perl Compatible Regular Expressions (PCRE) version string.
ICU: The International Components for Unicode (ICU) version string.
TRE: The TRE version string.
iconv: The iconv version string.
readline: The readline version string.
BLAS: The path with the implementation of BLAS in use.
LAPACK: The path with the implementation of LAPACK in use.