Index: zshconfig.ac
===================================================================
RCS file: /cvsroot/zsh/zsh/zshconfig.ac,v
retrieving revision 1.42
diff -b -u -r1.42 zshconfig.ac
--- zshconfig.ac	13 Nov 2003 14:34:34 -0000	1.42
+++ zshconfig.ac	25 Nov 2003 03:38:29 -0000
@@ -1577,6 +1577,7 @@
 dnl for instance, BeOS R4.51 does not support it yet
 dnl -----------
 if test -t 0 && test $ac_cv_func_tcsetpgrp = yes; then
+    trap "" SIGTTOU > /dev/null 2>&1 || :
     AC_CACHE_CHECK(if tcsetpgrp() actually works,
     zsh_cv_sys_tcsetpgrp,
     [AC_TRY_RUN([
@@ -1594,6 +1595,7 @@
     if test $zsh_cv_sys_tcsetpgrp = no; then
       AC_DEFINE(BROKEN_TCSETPGRP)
     fi
+    trap - SIGTTOU > /dev/null 2>&1 || :
 fi
 
 dnl -----------