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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/109709] List of prerequisites should include that tar
 is required (not only for unpacking the source).
Date: Wed, 03 May 2023 20:49:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109709

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
gcc/Makefile.in has:

# Install the include directory using tar.
install-headers-tar: stmp-int-hdrs install-include-dir
# We use `pwd`/include instead of just include to problems with CDPATH
# Unless a full pathname is provided, some shells would print the new CWD,
# found in CDPATH, corrupting the output.  We could just redirect the
# output of `cd', but some shells lose on redirection within `()'s
        (cd `${PWD_COMMAND}`/include ; \
         tar -cf - .; exit 0) | (cd $(DESTDIR)$(libsubdir)/include; tar xpf=
 - )
        (cd `${PWD_COMMAND}`/include-fixed ; \
         tar -cf - .; exit 0) | (cd $(DESTDIR)$(libsubdir)/include-fixed; t=
ar
xpf - )
# /bin/sh on some systems returns the status of the first tar,
# and that can lose with GNU tar which always writes a full block.
# So use `exit 0' to ignore its exit status.


This doesn't require GNU tar though, just any tar, so I think I agree that =
it's
just like cp and file and sed which are part of any unix-like environment.

The prerequisites page is specifically saying that GNU tar is needed on some
systems, for the reason Andrew stated above.=