./configure --with-apxs2 ; make

In file included from sapi_apache2.c:44:
php_apache.h:24: parse error before `ap_bucket_brigade'
php_apache.h:24: warning: no semicolon at end of struct or union
php_apache.h:32: parse error before `}'
php_apache.h:32: warning: data definition has no type or storage class
sapi_apache2.c: In function `php_apache_sapi_ub_write':
sapi_apache2.c:49: `ap_bucket' undeclared (first use in this function)
sapi_apache2.c:49: (Each undeclared identifier is reported only once
sapi_apache2.c:49: for each function it appears in.)
sapi_apache2.c:49: `b' undeclared (first use in this function)
sapi_apache2.c:50: `ap_bucket_brigade' undeclared (first use in this function)
sapi_apache2.c:50: `bb' undeclared (first use in this function)
sapi_apache2.c:51: `ctx' undeclared (first use in this function)
sapi_apache2.c:52: parse error before `now'
sapi_apache2.c:55: `sapi_globals' undeclared (first use in this function)
sapi_apache2.c:61: `now' undeclared (first use in this function)
sapi_apache2.c: In function `php_apache_sapi_header_handler':
sapi_apache2.c:77: `ctx' undeclared (first use in this function)
sapi_apache2.c:78: parse error before `char'
sapi_apache2.c:80: `val' undeclared (first use in this function)
sapi_apache2.c: In function `php_apache_sapi_send_headers':
.......