[Bug 2083302] Re: lvm2 ftbfs against autoconf 2.72

[Olivier Gayot]

Attaching debdiff. I didn't forward the patch to Debian since a similar
patch was already submitted as part of debbug 1079648.

The package is currently building in PPA ogayot/oracular-proposed:

https://launchpad.net/~ogayot/+archive/ubuntu/oracular-
proposed/+packages

** Bug watch added: Debian Bug tracker #1079648
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1079648

** Also affects: lvm2 (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1079648
   Importance: Unknown
       Status: Unknown

** Tags added: ftbfs

** Patch added: "1-2.03.22-1ubuntu1__2.03.22-1ubuntu2.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/2083302/+attachment/5823685/+files/1-2.03.22-1ubuntu1__2.03.22-1ubuntu2.debdiff

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Title:
  lvm2 ftbfs against autoconf 2.72

Status in lvm2 package in Ubuntu:
  New
Status in lvm2 package in Debian:
  Unknown

Bug description:
  excerpt from the logs [1]
  -------------------------

      [GEN] command-count.h
      [GEN] command-lines-input.h
  gcc -E -P cmdnames.h 2> /dev/null | \
  	@EGREP@ -v '^ *(|#.*|config|devtypes|dumpconfig|formats|fullreport|help|lastlog|lvmchange|lvpoll|pvdata|segtypes|systemid|tags|version) *$' > .commands
  \
  ( cat ./license.inc && \
    echo "/* Do not edit. This file is generated by the Makefile. */" && \
    printf "static const char _command_input[] =\n\n\"" && \
    mawk 'BEGIN {ORS = "\\n\"\n\""} !/^#/ && !/---/ && !/^$/' ./command-lines.in && \
    printf '\\n\\n";\n' \
  ) > command-lines-input.h
  \
  ( cat ./license.inc && \
    echo "/* Do not edit. This file is generated by the Makefile. */" && \
    printf "#define COMMAND_COUNT " && \
    @GREP@ -c '^ID:' command-lines.in \
  ) > command-count.h
  /bin/bash: line 2: @EGREP@: command not found
      [LN] man-generator.c
  ln -s -f command.c man-generator.c
  /bin/bash: line 5: @GREP@: command not found
  make[3]: *** [Makefile:172: command-count.h] Error 127
  make[3]: *** Deleting file 'command-count.h'
  make[3]: *** Waiting for unfinished jobs....
  make[3]: *** [Makefile:166: .commands] Error 127
  make[3]: *** Deleting file '.commands'
  make[3]: Leaving directory '/<<PKGBUILDDIR>>/debian/build/build_deb/tools'


  excerpt from autoconf 2.72 release notes [2]
  --------------------------------------------

  *** All internal uses of AC_EGREP_CPP and AC_EGREP_HEADER have been removed.
    These macros look for text matching a regular expression in the
    output of the C preprocessor.  Their use has been discouraged for
    many years, as they tend to be unreliable; it is better to find a
    way to use AC_COMPILE_IFELSE or AC_PREPROC_IFELSE instead.  We have
    finally taken our own advice.

    This change might break configure scripts that expected probes for
    ‘grep’ and/or the C preprocessor to happen as a side effect of an
    unrelated operation.  Such scripts can be fixed by adding
    AC_PROG_EGREP and/or AC_PROG_CPP in an appropriate place.

    The macros affected by this change are AC_C_STRINGIZE,
    AC_C_VARARRAYS, AC_FUNC_GETGROUPS, AC_FUNC_GETLOADAVG,
    AC_HEADER_TIOCGWINSZ, AC_PROG_GCC_TRADITIONAL, AC_TYPE_GETGROUPS,
    AC_TYPE_UID_T, and AC_XENIX_DIR. Many of these macros are themselves
    obsolete; if your configure script uses any of them, check whether
    it is actually needed.

  analysis
  --------

  There is an upstream patch for lvm2:
  https://gitlab.com/lvmteam/lvm2/-/commit/635df7486f2d6045c8fc085192b036d78b309907

  [1] https://launchpadlibrarian.net/749244995/buildlog_ubuntu-oracular-amd64.lvm2_2.03.22-1ubuntu1_BUILDING.txt.gz
  [2] https://lists.gnu.org/archive/html/autotools-announce/2023-12/msg00003.html

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