How should this macro argument be quoted: -Wc,"lang(extended)" Here is the AC_DEFUN and below it is the macro. AC_DEFUN(APR_ADDTO,[ $1="$$1 $2"; export $1 ]) APR_ADDTO(CFLAGS, [-Wc,lang(extended)]) The problem is, the only strings accepted by autoconf are not accepted by c89 during the make. It needs to look like -Wc,"lang(extended)" for c89 to accept it, but autoconf doesn't like this. The only thing autoconf takes is without any quotes at all (as shown in the APR_ADDTO). Any help would be great. Thanks, Baran ----------------------------------------------- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com