build issues with BusyBox tar on Alpine

[Baesken, Matthias]

Hi,  today I was running  into build problems with  busybox tar  on Alpine Linux .
When building “product-bundles”   I get :

/bin/tar: unrecognized option: I
BusyBox v1.34.1 (2022-04-04 10:19:27 UTC) multi-call binary
Usage: tar c|x|t [-ZzJjahmvokO] [-f TARFILE] [-C DIR] [-T FILE] [-X FILE] [LONGOPT]... [FILE]...

Looks like the   TAR_INCLUDE_PARAM   is  not  correctly  detected .
We handle already some different tar implementations  in  autoconf/basic_tools.m4  but so far not BusyBox   :

  if test "x$TAR_TYPE" = "xgnu"; then
    TAR_INCLUDE_PARAM="T"
    TAR_SUPPORTS_TRANSFORM="true"
  elif test "x$TAR_TYPE" = "aix"; then
    # -L InputList of aix tar: name of file listing the files and directories
    # that need to be   archived or extracted
    TAR_INCLUDE_PARAM="L"
    TAR_SUPPORTS_TRANSFORM="false"
  else
    TAR_INCLUDE_PARAM="I"
    TAR_SUPPORTS_TRANSFORM="false"
  Fi

So  this leads us to  I  for   TAR_INCLUDE_PARAM  but seems  Busybox tar  has also  T   like gnutar :

bash-5.1# tar -v
BusyBox v1.34.1 (2022-04-04 10:19:27 UTC) multi-call binary.

Usage: tar c|x|t [-ZzJjahmvokO] [-f TARFILE] [-C DIR] [-T FILE] [-X FILE] [LONGOPT]... [FILE]...

Create, extract, or list files from a tar file
     ………………….
                -T FILE   File with names to include

Should we add logic  to  autoconf/basic_tools.m4     to   handle  Busybox tar  and set  TAR_INCLUDE_PARAM   correctly ?
My  “workaround” was to additionally  install   gnu tar  on my Alpine (this is available too ).

(another option might be to add some kind of check , currently  configure  runs successfully but still the build fails which is not really nice 😉 ) !

Best regards, Matthias