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 <quint...@redhat.com> Cc: qemu-sta...@nongnu.org Signed-off-by: Paolo Bonzini <pbonz...@redhat.com> --- configure | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/configure b/configure index 80ca1c922151..9cdce69b7852 100755 --- a/configure +++ b/configure @@ -4,9 +4,8 @@ # # Unset some variables known to interfere with behavior of common tools, -# just as autoconf does. -CLICOLOR_FORCE= GREP_OPTIONS= -unset CLICOLOR_FORCE GREP_OPTIONS +# just as autoconf does. Unlike autoconf, we assume that unset exists. +unset CLICOLOR_FORCE GREP_OPTIONS BASH_ENV ENV MAIL MAILPATH CDPATH # Don't allow CCACHE, if present, to use cached results of compile tests! export CCACHE_RECACHE=yes -- 2.40.1
