error: stray '@' in program

Hi all,

I'm building a new box to experiment a bit, but with SVN Revision: 4956
the build fails. The command sequence is:

make clean
./configure --with-mysql
make

and then the make process fails with:

gcc -std=gnu99 -D_REENTRANT=1 -I. -Igw -g -O2 -D_XOPEN_SOURCE=600 
-D_BSD_SOURCE -D_LARGE_FILES= -I/usr/include/libxml2 
-I/usr/include/openssl -I/usr/include/mysql -o wmlscript/wsgram.o -c 
wmlscript/wsgram.c
wmlscript/wsgram.y: In function 'ws_yy_parse':
wmlscript/wsgram.y:125: error: stray '@' in program
wmlscript/wsgram.y:125:27: error: invalid suffix "first_line" on 
floating constant
wmlscript/wsgram.y:138: error: stray '@' in program

and a lot more repetition of similar errors. The box is a virtualised 
debian 6.0.3 machine running kernel 2.6.35-4 and as far as I can tell I 
have all the dependencies.

To be complete, I did check out the sqlbox and smppbox code in the 
addons directory as well.

Any clue on what I'm missing is much appreciated.

Best regards,
-- 
Met vriendelijke groet,

Florian Overkamp
SpeakUp BV
T: 088-SPEAKUP (088-7732587)
T: 053-4305842