mirror/autoconf
2
0
Fork 0
mirror of git://git.sv.gnu.org/autoconf synced 2025-01-06 10:25:53 +08:00
Code Issues Packages Projects Releases Wiki Activity

m4sh: preserve set -vx over re-exec

Browse Source 
See http://lists.gnu.org/archive/html/bug-gnulib/2010-09/msg00035.html
for the motivation for this patch.

* lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): Trace through
re-exec, to make it easier to debug script startup issues.
Idea from recent bug-gnulib change to init.sh.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2010-09-08 10:31:50 -06:00
parent e10883c0df
commit cd12a7faea
2 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
ChangeLog
View File

@ -1,5 +1,10 @@
2010-09-08 Eric Blake <eblake@redhat.com>
m4sh: preserve set -vx over re-exec
* lib/m4sugar/m4sh.m4 (_AS_DETECT_BETTER_SHELL): Trace through
re-exec, to make it easier to debug script startup issues.
Idea from recent bug-gnulib change to init.sh.
docs: update alloca recommendations
* doc/autoconf.texi (Particular Functions): Don't redeclare alloca
on FreeBSD.

9
lib/m4sugar/m4sh.m4
View File

@ -227,11 +227,18 @@ dnl Remove any tests from suggested that are also required
[# We cannot yet assume a decent shell, so we have to provide a
# neutralization value for shells without unset; and this also
# works around shells that cannot unset nonexistent variables.
# Preserve -v and -x to the replacement shell.
BASH_ENV=/dev/null
ENV=/dev/null
(unset BASH_ENV) >/dev/null 2>&1 && unset BASH_ENV ENV
export CONFIG_SHELL
exec "$CONFIG_SHELL" "$as_myself" ${1+"$[@]"}])
case $- in @%:@ ((((
*v*x* | *x*v* ) as_opts=-vx ;;
*v* ) as_opts=-v ;;
*x* ) as_opts=-x ;;
* ) as_opts= ;;
esac
exec "$CONFIG_SHELL" $as_opts "$as_myself" ${1+"$[@]"}])
dnl Unfortunately, $as_me isn't available here.
AS_IF([test x$as_have_required = xno],