Description:
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I downloaded the latest version 0.1.4 on my Mac OS X laptop. Running 'sudo /usr/local/php5.2.1/bin/phpize' went well but then I get an error while compiling.

Reproduce code:
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- download latest version
- command : "sudo /usr/local/php5.2.1/bin/phpize"
- command : "./configure"
- command : "make"



Expected result:
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Something like "everything is fine, please proceed"...

Actual result:
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/bin/sh /Users/perrick/Desktop/parse_tree-0.1.4/parse_tree-0.1.4/libtool --mode=link gcc -DPHP_ATOM_INC -I/Users/perrick/Desktop/parse_tree-0.1.4/parse_tree-0.1.4/include -I/Users/perrick/Desktop/parse_tree-0.1.4/parse_tree-0.1.4/main -I/Users/perrick/Desktop/parse_tree-0.1.4/parse_tree-0.1.4 -I/usr/include/php -I/usr/include/php/main -I/usr/include/php/TSRM -I/usr/include/php/Zend  -DHAVE_CONFIG_H  -g -O2   -o parse_tree.la -export-dynamic -avoid-version -prefer-pic -module -rpath /Users/perrick/Desktop/parse_tree-0.1.4/parse_tree-0.1.4/modules  parse_tree.lo php_lexer.lo php_parser.lo 
gcc ${wl}-flat_namespace ${wl}-undefined ${wl}suppress -o .libs/parse_tree.so -bundle  .libs/parse_tree.o .libs/php_lexer.o .libs/php_parser.o 
/usr/bin/ld: multiple definitions of symbol _yytext
.libs/php_lexer.o definition of _yytext in section (__DATA,__common)
.libs/php_parser.o definition of _yytext in section (__DATA,__data)
collect2: ld returned 1 exit status
make: *** [parse_tree.la] Error 1