[Grep-devel] new snapshot available: grep-2.27.49-20ca

[Jim Meyering]

Here is a snapshot of the latest.
Thank you especially to Paul Eggert and Norihiro Tanaka for all
of their improvements, both in the grep repository and via gnulib.

Please give this a try.
I hope to release 2.28 in about two weeks.


grep snapshot:
  http://meyering.net/grep/grep-ss.tar.xz      1.4 MB
  http://meyering.net/grep/grep-ss.tar.xz.sig
  http://meyering.net/grep/grep-2.27.49-20ca.tar.xz

NEWS
-------------------
** Bug fixes

  When grep -Fo finds matches of differing length, it could
  mistakenly print a shorter one.  Now it prints a longest one.
  [bug introduced in grep-2.26]

  When standard output is /dev/null, grep no longer fails when
  standard input is a file in the Linux /proc file system, or when
  standard input is a pipe and standard output is in append mode.
  [bugs introduced in grep-2.27]

  Fix performance regression with multiple patterns, e.g., for -Fi in
  a multi-byte locale, or for -Fw in a single-byte locale.
  [bugs introduced in grep-2.19, grep-2.22 and grep-2.26]

** Improvements

  Improve performance for -E or -G pattern lists that are easily
  converted to -F format.

--------------------
Changes in grep since v2.27:

Arnold D. Robbins (1):
      build: update gnulib submodule to latest

Jim Meyering (9):
      maint: post-release administrivia
      maint: tell "syntax-check" not to worry about the NEWS update
      tests: use just-built grep in more places
      maint: fix "syntax-check" failure
      gnulib: update to latest, fixing a parallel getopt test failure
      maint: update gnulib and copyright dates for 2017
      maint: avoid new syntax-check failures
      tests: really add the new test name
      gnulib: update to latest

Norihiro Tanaka (2):
      grep: improve performance with multiple patterns
      grep -Fo could report a match that is not the longest

Paul Eggert (32):
      maint: clarify early-exit news for 2.27
      grep: simplify finalize_input
      grep: work around proc lseek glitch
      build: update gnulib submodule to latest
      build: update gnulib submodule to latest
      build: update gnulib submodule to latest
      grep: simplify line counting in patterns
      grep: simplify matcher configuration
      grep: fix performance with multiple patterns
      maint: rewrite to avoid some macros
      grep: remove C label
      grep: simplify Fexecute
      grep: specialize word-finding functions
      grep: speed up -wf in C locale
      grep: standardize on localeinfo.multibyte
      grep: improve word checking with UTF-8
      grep: fix comment in searchutils.c
      grep: minor performance tweak for pure functions
      grep: fix bug with '... | grep pat >> /dev/null'
      * NEWS: Fix typo.
      grep: int cleanup in kwset.c
      maint: space before paren
      grep: speed up -x with many patterns
      grep: improve comments, mostly in kwset
      dfa: prefer ptrdiff_t to size_t
      build: update gnulib submodule to latest
      Improve -i performance in typical UTF-8 searches
      * src/kwset.c: Fix comment typo.
      * NEWS: Fix typo.
      grep: remove Commentz-Walter code
      grep: speed up Aho-Corasick when at most 2 bytes
      grep: simplify recent kwset change

Zev Weiss (5):
      grep: prepare search backends for thread-safety
      dfasearch: thread safety
      kwsearch: thread safety
      pcresearch: thread safety
      grep: move localeinfo to grep.c


Changes in gnulib since v2.27:

* gnulib ca3ca77...4e6e16b (148):
  > parse-datetime: handle timezones reentrantly
  > time_rz: fix comment typo
  > localename: port to cygwin 2.6
  > users.txt: Update wget URL (tiny change)
  > users.txt: Add wget2 (tiny change)
  > dfa: fix memory leak in parse
  > parse-datetime: fix dependence on AC_PROG_SED
  > intprops: update doc URLs
  > host-cpu-c-abi: Add support for armhf, arm64, x32, s390x.
  > update from texinfo
  > localeinfo: case_folded_counterparts and WEOF
  > dfa: port to gcc -fsanitize=undefined
  > strftime: %z is -00 if unknown
  > dfa: port to older GCC
  > Update DEPENDENCIES.
  > maint.mk: enforce spelling of "timestamp" (i.e., no space)
  > dfa: minor simplification with emptyset
  > dfa: shrink constraints from 4 bits to 3
  > dfa: omit unnecessary ptrdiff_t check
  > dfa: omit unnecessary allocation
  > dfa: omit unused local
  > maint: time stamp -> timestamp
  > maint: remove stray .texi files
  > getprogname: fix port to IRIX
  > dfa: melt down dfastate into build_state
  > dfa: simplify transition table allocation
  > dfa: fix reallocation bug when matching newlines
  > Avoid -Wundef warning about undefined WINDOWS_SOCKETS.
  > Avoid -Wundef warning about undefined __USE_FILE_OFFSET64.
  > stdioext: Port to Minix 3.2 and newer.
  > getprogname: port to IRIX
  > localename-tests: port to NetBSD 7
  > glob, intprops, xalloc: work around Clang bug
  > dfa: fix 'return' typo
  > lock tests: Prefer semaphore over mutex.
  > parse-datetime: fix generated paths for coverage files
  > maint.mk: support parallel execution of coverage
  > lock: Provide guarantee to avoid writer starvation for rwlocks.
  > thread: Fix pth port.
  > parse-datetime: fix debug message on lone year number
  > parse-datetime: fix local timezone debug messages
  > parse-datetime: add debug warning about DST changes
  > parse-datetime: add debug warning about date arithmetic
  > parse-datetime: fix debug message of relative part after timezone
  > parse-datetime: fix incorrect debug message on lone number
  > exec
  > build-aux/mdate-sh
  > doc: fix typo in previous change
  > Revert copyright-year change to synced files
  > doc: modernize for C11 etc.
  > dfa: prefer functions to FETCH_WC macro
  > dfa: narrow more local var scopes
  > dfa: remove duplicate assignment
  > dfa: simplify constraint-dependency checking
  > dfa: prefer functions and constants to macros
  > dfa: narrow more local var scopes
  > dfa: narrow the scope of many local variables
  > gettext from dev
  > version-etc: new year
  > do-release-commit-and-tag: avoid shell syntax error
  > maint.mk: hoist gnulib_dir definition earlier
  > maint.mk: do not always evaluate intprops-related shell
  > maint.mk: improve sc_prohibit_intprops_without_use
  > dfa: shorten sbit, success
  > dfa: simplify multibyte_prop etc.
  > dfa: minor performance tweak
  > dfa: wrap charclass inside a struct
  > Changelog: insert omitted word
  > maint.mk: update list of intprops.h symbol names
  > getopt: fix parallel test failure
  > xalloc: x2nrealloc check for ptrdiff_t overflow
  > lock test: Fix performance problem on multi-core machines.
  > autoupdate
  > vma-iter: Fix endless loop on 64-bit Windows.
  > stdint: Fix WINT_MAX to match the gnulib provided wint_t on minw.
  > getopt-posix-tests: fix Makefile typo
  > dfa: improve worst-case 'replace' performance
  > dfa: performance improvement for removal of epsilon closure
  > autoupdate
  > Split tests for getopt-posix and getopt-gnu.
  > posix-modules: Add options for specific platforms.
  > getopt: Fix link error for users of getopt() in <unistd.h>.
  > getaddrinfo tests: Avoid compilation error on MSVC.
  > getlogin, getlogin_r: Fix link errors on MSVC.
  > Un-deprecate the 'progname' module.
  > Reorganize NEWS a bit.
  > tanhf: Avoid redefinition error on MSVC.
  > tanf: Avoid redefinition error on MSVC.
  > sqrtf: Avoid redefinition error on MSVC.
  > sinhf: Avoid redefinition error on MSVC.
  > sinf: Avoid redefinition error on MSVC.
  > logf: Avoid redefinition error on MSVC.
  > log10l: Avoid redefinition error on MSVC.
  > log10f: Avoid redefinition error on MSVC.
  > hypotl: Avoid redefinition error on MSVC.
  > hypotf: Avoid redefinition error on MSVC.
  > fmodl: Avoid redefinition error on MSVC.
  > fmodf: Avoid redefinition error on MSVC.
  > expf: Avoid redefinition error on MSVC.
  > coshf: Avoid redefinition error on MSVC.
  > cosf: Avoid redefinition error on MSVC.
  > atan2f: Avoid redefinition error on MSVC.
  > atanf: Avoid redefinition error on MSVC.
  > asinf: Avoid redefinition error on MSVC.
  > acosf: Avoid redefinition error on MSVC.
  > Avoid redefinition errors on MSVC.
  > Avoid redefinition errors on MSVC.
  > stdint: Fix WINT_MAX to match the gnulib provided wint_t on MSVC.
  > Avoid autoconf warning.
  > fpending: Revert workaround against Emacs bug.
  > getlogin_r tests: Port to mingw.
  > getlogin: Port to newer mingw.
  > builtin-expect: improve port to IBM XL C
  > builtin-expect: port to IBM XL C
  > regex: fix dependency
  > builtin-expect: new module
  > init.sh: Add possibility to not delete temporary files.
  > regex: fix integer-overflow bug in never-used code
  > fpending: fix port to MinGW on Emacs
  > safe-alloc: use xalloc-oversized
  > xalloc: do not exceed PTRDIFF_MAX
  > malloca: do not exceed PTRDIFF_MAX
  > quotearg: pacify GCC better
  > xalloc-oversized: check for PTRDIFF_MAX too
  > dfa: fix glitches in previous commit
  > dfa: fix some unlikely integer overflows
  > dfa: add an assertion to avoid coverity false positive
  > dfa: remove DFA_CASE_FOLD flag in favor of RE_ICASE
  > dfa: remove DFA_CASE_FOLD flag in favor of RE_ICASE
  > link: fix test to declare use of rename()
  > fpending: Port to native Windows with MSVC.
  > stdioext: Port to native Windows with MSVC.
  > non-recursive-gnulib-prefix-hack.m4: remove leading "(" in case stmt
  > threadlib: Optimize out runtime test on Solaris >= 10.
  > stdint: Update doc about Solaris 9.
  > c-ctype tests: Fix link error on Solaris 9.
  > dfa: fix performance bug that recomputes trans
  > same-inode: port to MinGW
  > javacomp: Support Java 7 and 8.
  > gnulib-tool: fix the previous change
  > gnulib-tool: fix the previous change
  > gnulib-tool: properly list the LGPL3orGPLv2 license
  > localcharset: Avoid theoretical buffer overrun.
  > Relicense some modules under LGPLv2+.
  > scandir: Fix _D_ALLOC_NAMLEN() on OS/2 kLIBC
  > alphasort, scandir: Port to OS/2 kLIBC
  > relocatable: Fix that /@unixroot prefix is not working on OS/2 kLIBC
  > sys_socket: typedef sa_family_t correctly on OS/2 kLIBC