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_AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1
From: |
Jan Madzik |
Subject: |
_AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1 |
Date: |
Thu, 25 Jun 2009 18:48:37 +0200 |
Hi,
I found bug in korn shell (version M-11/16/88f) on AIX 6.1 (tested
only on one server instance) and due to this bug I couldn't correctly
configure ImageMagick.
> uname -a
AIX myhost 1 6 00CB25304C00
Here is minimal script that shows this bug:
#!/bin/sh
echo `echo 'hello bug\c'`
echo `echo this text fall to blackhole`
echo `echo next line`
and output:
h
hello bug
next line
Generated configure and config.status scripts contains some tests that
causes wrong initialization of some variables later.
Fragments from configure script:
...
...
ECHO_C= ECHO_N= ECHO_T=
case `echo -n x` in
-n*)
case `echo 'x\c'` in
*c*) ECHO_T=' ';; # ECHO_T is single tab character.
*) ECHO_C='\c';;
esac;;
*)
ECHO_N='-n';;
esac
...
...
...
ac_prefix_conf_OUT=`echo magick/magick-config.h`
...
...
Variable ac_prefix_conf_OUT contains only one character - x.
My solution was to configure it with another shell (./configure
SHELL=/bin/ksh93) but I think it would be nice to handle this bug
in autoconf.
I'm not sure if it is ok, but this patch helps me:
diff --git a/lib/m4sugar/m4sh.m4 b/lib/m4sugar/m4sh.m4
index c7b0bff..b884a88 100644
--- a/lib/m4sugar/m4sh.m4
+++ b/lib/m4sugar/m4sh.m4
@@ -785,9 +785,11 @@ m4_defun([_AS_ECHO_N_PREPARE],
[ECHO_C= ECHO_N= ECHO_T=
case `echo -n x` in @%:@((((
-n*)
- case `echo 'x\c'` in
+ case `echo 'xy\c'` in
*c*) ECHO_T=' ';; # ECHO_T is single tab character.
- *) ECHO_C='\c';;
+ xy*) ECHO_C='\c';;
+ *) echo `echo bug ksh88 AIX 6.1` > /dev/null # this line
handles bug in ksh version M-11/16/88f on AIX 6.1
+ ECHO_C='\c' ;;
esac;;
*)
ECHO_N='-n';;
But this patch solve just this particular test. It does not solve
further use of echo with ECHO_C variable in command substitution.
- _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1,
Jan Madzik <=
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Ralf Wildenhues, 2009/06/25
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Eric Blake, 2009/06/27
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Ralf Wildenhues, 2009/06/28
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Eric Blake, 2009/06/30
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Ralf Wildenhues, 2009/06/30
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Eric Blake, 2009/06/30
- Re: _AS_ECHO_N_PREPARE - bug correction in ksh88 on AIX 6.1, Ralf Wildenhues, 2009/06/30