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Warning on OpenBSD 2.7
From: |
Pavel Roskin |
Subject: |
Warning on OpenBSD 2.7 |
Date: |
Tue, 22 May 2001 20:36:23 -0400 (EDT) |
Hello!
First of all, I apologize for not having tested Autoconf on OpenBSD 2.7
immediately before the release. I had tested it few days before that, and
it worked. I didn't check the latest CPP changes. I accept full
responsibility for letting this problem go into 2.50 :-(
The "configure" script created by Autoconf-2.50 from the following file:
AC_INIT
AC_PROG_CPP
AC_OUTPUT
emits a warning when it's run by the native shell on OpenBSD 2.7:
./configure[1668]: break: can only break 1 level(s)
Indeed, "break 2" is inside one loop only. The comment in AC_PROG_CPP
says: "break 2 since there is a loop in there". But it's not true -
_AC_PROG_PREPROC_WORKS_IFELSE expands $1 after the loop.
Unfortunately, the warning in /bin/sh on OpenBSD causes several tests to
fail. I don't think there may be any real problems, since AC_PROG_CPP is
highly unlikely to be called in a loop.
Here's the fix. ChangeLog:
* aclang.m4 (AC_PROG_CPP): Use `break' instead of `break 2' since
_AC_PROG_PREPROC_WORKS_IFELSE expands arguments outside the loop.
(AC_PROG_CXXCPP): Likewise.
____________________________________
--- aclang.m4
+++ aclang.m4
@@ -881,8 +881,7 @@
# Double quotes because CPP needs to be expanded
for CPP in "$CC -E" "$CC -E -traditional-cpp" "/lib/cpp"
do
- # break 2 since there is a loop in there.
- _AC_PROG_PREPROC_WORKS_IFELSE([break 2])
+ _AC_PROG_PREPROC_WORKS_IFELSE([break])
done
ac_cv_prog_CPP=$CPP
])dnl
@@ -1089,8 +1088,7 @@
# Double quotes because CXXCPP needs to be expanded
for CXXCPP in "$CXX -E" "/lib/cpp"
do
- # break 2 since there is a loop in there.
- _AC_PROG_PREPROC_WORKS_IFELSE([break 2])
+ _AC_PROG_PREPROC_WORKS_IFELSE([break])
done
ac_cv_prog_CXXCPP=$CXXCPP
])dnl
____________________________________
Regards,
Pavel Roskin
- Warning on OpenBSD 2.7,
Pavel Roskin <=