Lighttpd

phpize [fine]
./configure [fine]
make [...]
/usr/bin/m4 -B 102400 -D srcdir='`'"/home/user/xcache-3.2.0'" -D builddir='`'".'" /home/user/xcache-3.2.0/processor/main.m4 > ./processor.out.c.tmp
/usr/bin/m4: warning: `m4 -B' may be removed in a future release
AUTOCHECK INFO: runtime autocheck Disabled (optimized build)
AUTOCHECK WARN: zend_compiled_variable: missing structinfo, dont panic
AUTOCHECK INFO: zend_try_catch_element: processor looks good
AUTOCHECK ERROR: ==== calc zend_brk_cont_element =================
continued...

is this an arch config build mismatch?

any pointers appreciated. tia.