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configure: unset harmful environment variables

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Apart from CLICOLOR_FORCE and GREP_OPTIONS, there are other variables
that are listed in the Autoconf manual.  While Autoconf neutralizes them
very early, and assumes it does not (yet) run in a shell that has "unset",
QEMU assumes that the user invoked configure under a POSIX shell, and
therefore can simply use "unset" to clear them.

CDPATH is particularly nasty because it messes up "cd ... && pwd".

Reported-by: Juan Quintela <quintela@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-05-25 17:46:07 +02:00
parent eea2d14117
commit 5b507233e6
1 changed files with 2 additions and 3 deletions
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5
configure vendored
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@ -4,9 +4,8 @@
# #
# Unset some variables known to interfere with behavior of common tools, # Unset some variables known to interfere with behavior of common tools,
# just as autoconf does. # just as autoconf does. Unlike autoconf, we assume that unset exists.
CLICOLOR_FORCE= GREP_OPTIONS= unset CLICOLOR_FORCE GREP_OPTIONS BASH_ENV ENV MAIL MAILPATH CDPATH
unset CLICOLOR_FORCE GREP_OPTIONS
# Don't allow CCACHE, if present, to use cached results of compile tests! # Don't allow CCACHE, if present, to use cached results of compile tests!
export CCACHE_RECACHE=yes export CCACHE_RECACHE=yes