Now can auto-patch an already present pari src directory. Controlled by the new options force_patch or force_patch=NUM (default is 1). Default: do if it is our subdirectory. Fix patch/diff_2.3.5_mingw-w64. Take into account a changed name for the download directory for GP/PARI src. A workaround for broken <<do FILE>> behaviour in newer Perls (in ./test_eng/ex.t). Include -I. when we run $^X on GP/PARI's scripts (now . is disabled on newer Perls) during Math::Pari build. (Analysis by Kent Fredric, ticket 120711.) Users could have sneaked in a later version than 2.3.5. Detect this and warn. Makefile.PL was not using strict. Allow -DUSE_STANDALONE_PARILIB to make Pari.xs use only public interfaces of GP/PARI. Incorporate certain changes to simplify building with a standalone PARI library: -KPIC per http://gnats.netbsd.org/45271 (but it is not changed to -fPIC already???) New unsupported function pari_formatted_version_from_includes($includeDir) from public headers. Change name of option parilib to parilibs. With -DNO_GNUPLOT_PARI, has a chance to compile with native graphics enabled (not tested). (Temporarily?) disable ploth() testing when this is defined. The code to filter out too new versions of Pari directories was reacting on non-directories too. Allow building if the plotting functionality removed in v2.2.13 is restored (not tested). Include patches diff_add_gnuplotNeeded diff_add_gnuplotAdd restoring this remove functionality (and diff_add_gnuplotAll for completeness). Auto-apply these patches starting with 2.2.13. Update build time messages to reflect the status of plotting.