[MacPorts] #49239: "gzip: /usr/bin/gzip: unknown suffix -- ignored" error during MacPorts 2.3.4 build

[MacPorts]

#49239: "gzip: /usr/bin/gzip: unknown suffix -- ignored" error during MacPorts
2.3.4 build
------------------------+--------------------------------
 Reporter:  thecloud@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.3.4
 Keywords:              |       Port:
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 Steps to reproduce:

 $ export GZIP="-9"
 $ tar xvzf MacPorts-2.3.4.tar.gz -C /tmp/
 $ cd /tmp/MacPorts-2.3.4/
 $ ./configure && make

 If the GZIP environment variable is set to a whitespace-separated list of
 options (as is documented on the man page for gzip), the configure script
 for MacPorts fails with this error:

 configure: === extracting vendor/tcl8.5.15-src.tar.gz
 gzip: /usr/bin/gzip: unknown suffix -- ignored
 configure: error: tarball vendor/tcl8.5.15-src.tar.gz did not extract to
 vendor/tcl8.5.15/unix

 Workaround:
 $ unset GZIP

 Diagnosis:
 The configure script (incorrectly) expects that if the GZIP environment
 variable is set, it contains a path to the gzip binary. This directly
 conflicts with the documented contents of the GZIP variable, as understood
 by /usr/bin/gzip. Unsetting GZIP shouldn't be necessary to build MacPorts
 successfully, since it shouldn't overload the contents of an existing
 variable.

-- 
Ticket URL: <https://trac.macports.org/ticket/49239>
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