Compiling & installing libevent ...

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  ^~~~

bufferevent_openssl.c:237:2: note: (near initialization for 'methods_bufferevent')

bufferevent_openssl.c:228:19: error: storage size of 'methods_bufferevent' isn't known

 static BIO_METHOD methods_bufferevent = {

                   ^~~~~~~~~~~~~~~~~~~

make[2]: *** [Makefile:793: bufferevent_openssl.lo] Error 1

make[2]: Leaving directory '/root/xunsearch-full-1.4.15/libevent-2.0.21-stable'

make[1]: *** [Makefile:857: install-recursive] Error 1

make[1]: Leaving directory '/root/xunsearch-full-1.4.15/libevent-2.0.21-stable'

make: *** [Makefile:1182: install] Error 2

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ERROR: failed to compile libevent, see 'setup.log' for more detail

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