Re: bison version check error: "./configure: bad math expression: unbalanced stack"

[Akim Demaille]

| bison configure reports version check errors at:
| (initial config)
| .....
| checking for bison... bison -y
| checking bison version... ./configure: bad math expression: unbalanced
| stack [14411]

This is done by Gettext.

| checking for flex... flex
| .....
| 
|  and,
| 
| (Configuring Zend)
| .....
| checking bison version... ./configure: bad math expression: unbalanced
| stack [99981]
| 
| checking for limits.h... (cached) yes
| checking malloc.h usability... yes
| .....
| 
| in both cases, the culprit seems to be the following test for Bison
| version in configure:
| 
| 
| echo $ECHO_N "checking bison version... $ECHO_C" >&6
|     set `bison --version| grep 'GNU Bison' | cut -d ' ' -f 4 | sed -e
| 
| 's/\./ /'`
|     if test "${1}" = "1" -a "${2}" -lt "28"; then
|         { echo "$as_me:$LINENO: WARNING: You will need bison 1.28 if
|         you want to
| 
| echo "$as_me: WARNING: You will need bison 1.28 if you want to
| regenerate the Ze
| 
| 
| note that
| 
| > bison --version| grep 'GNU Bison' | cut -d ' ' -f 4 | sed -e 's/\./ /'
| 
| reports back:
| 
| > 1 49a

What version of Bison are you trying to compile?  I think Gettext was
fixed since then.