Makefile: Unexport TAR_OPTIONS

GNU tar > 1.13.17 interprets TAR_OPTIONS as an environment variable
containing options to be prepended to the set on the command line.

Since we use the same variable, if the user's environment already
contains TAR_OPTIONS, our use of the same variable name modifies
the environment and causes untars to misbehave when TAR_OPTIONS
causes a -xf to be prepended to the tar command line, likely
converting a subsequent flag into a spurious filename.

Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/Makefile b/Makefile
index 9dfb1e082426502f3de898adb51a1d70f435709f..067458b6a9d1cbb24d3f26ccd07eb340f2e199c4 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -261,6 +261,7 @@ unexport CPP
 unexport CFLAGS
 unexport CXXFLAGS
 unexport GREP_OPTIONS
+unexport TAR_OPTIONS
 unexport CONFIG_SITE
 unexport QMAKESPEC
 unexport TERMINFO