diff options
| author | Stefano Lattarini <stefano.lattarini@gmail.com> | 2012-03-03 10:44:25 +0100 |
|---|---|---|
| committer | Stefano Lattarini <stefano.lattarini@gmail.com> | 2012-03-03 10:44:25 +0100 |
| commit | cca288d94e1d1992dd157e43c5891213c87b46be (patch) | |
| tree | 062617038918c189ecc92827094a748b07724392 | |
| parent | 46a40ee9c4fcc598e20d4d997915529ece58277d (diff) | |
| download | autoconf-cca288d94e1d1992dd157e43c5891213c87b46be.tar.gz | |
configure: don't infloop when re-executing with $CONFIG_SHELL
It turns out our guard against infinite recursion wasn't good
enough when shells without $LINENO support were involved, since
the creation-and-sourcing of configure.lineno broke the guard's
expectations. Reports by Tim Rice and Paul Eggert.
* lib/m4sugar/m4sh.m4 (_AS_LINENO_PREPARE): Export '_as_can_reexec'
to "no" before sourcing the just-created configure.lineno.
| -rw-r--r-- | lib/m4sugar/m4sh.m4 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4 index be013aaa..f05346b7 100644 --- a/lib/m4sugar/m4sh.m4 +++ b/lib/m4sugar/m4sh.m4 @@ -1199,6 +1199,10 @@ dnl Eggert wrote the scripts with optimization help from Paolo Bonzini). chmod +x "$as_me.lineno"] || AS_ERROR([cannot create $as_me.lineno; rerun with a POSIX shell]) + # If we had to re-execute with $CONFIG_SHELL, we're ensured to have + # already done that, so ensure we don't try to do so again and fall + # in an infinite loop. This has already happened in practice. + _as_can_reexec=no; export _as_can_reexec # Don't try to exec as it changes $[0], causing all sort of problems # (the dirname of $[0] is not the place where we might find the # original and so on. Autoconf is especially sensitive to this). |