dnl Declare $LEMON precious, and check for a `lemon` in $PATH.
AC_DEFUN(PSI_LEMON, [
AC_ARG_VAR(LEMON, The lemon parser generator of the SQLite project)
- AC_PATH_PROG(LEMON, lemon, ./lemon)
+ if test -z "$LEMON"
+ then
+ AC_PATH_PROG(LEMON, lemon, ./lemon)
+ fi
PHP_SUBST(LEMON)
])