This goes on top of the 29 patch series of "Easy to review grep & pre-PCRE changes" (<20170511091829.5634-1-avarab@xxxxxxxxx>; https://public-inbox.org/git/20170511091829.5634-1-avarab@xxxxxxxxx/). This could be split into 3 unrelated things, but I have think it's probably easier for everyone to bundle these up, since they all go on top of the other series. Comments below: Ævar Arnfjörð Bjarmason (7): grep: don't redundantly compile throwaway patterns under threading grep: skip pthreads overhead when using one thread Internal changes to grep to not redundantly spawn threads. No functional changes, just internal cleanup. log: add -P as a synonym for --perl-regexp Trivial change to add -P. grep: add support for the PCRE v1 JIT API grep: un-break building with PCRE < 8.32 grep: un-break building with PCRE < 8.20 I tested ancient versions of PCRE, which turned up build issues that are fixed this time around. grep: add support for PCRE v2 The main point of this whole thing. Documentation/rev-list-options.txt | 1 + Makefile | 30 +++++-- builtin/grep.c | 16 +++- configure.ac | 77 +++++++++++++--- grep.c | 180 ++++++++++++++++++++++++++++++++++++- grep.h | 31 +++++++ revision.c | 2 +- t/t4202-log.sh | 12 +++ t/test-lib.sh | 2 +- 9 files changed, 327 insertions(+), 24 deletions(-) -- 2.11.0