"Original" source code compilation libevent-2.0.21-stable generated library file description

Follow the instructions in the README to first execute the Configure

The output information below is for the detection of the machine where the source code is compiled

[[email protected] libevent-2.0.21-stable]#./configure checking for a bsd-compatible install .../usr/bin/install-c ... configure:creating./config.statusconfig.status:creating libevent.pcconfig.status:creating Libevent_ Openssl.pcconfig.status:creating libevent_pthreads.pcconfig.status:creating Makefileconfig.status:creating Include/makefileconfig.status:creating test/makefileconfig.status:creating sample/makefileconfig.status:creating Config.hconfig.status:config.h is unchangedconfig.status:executing depfiles commandsconfig.status:executing libtool Commands[[email protected] libevent-2.0.21-stable]#

Next, execute make (only the library files we care about)

[[email protected] libevent-2.0.21-stable]# make ... "Generate libevent-2.0.so.5.1.9 file" Libtool:link:gcc-shared-fpic- Dpic. libs/event.o. LIBS/EVTHREAD.O libs/buffer.o libs/bufferevent.o. libs/bufferevent_sock.o. Libs/bufferevent_ FILTER.O. libs/bufferevent_pair.o. LIBS/LISTENER.O libs/bufferevent_ratelim.o libs/evmap.o. libs/log.o. libs/ EVUTIL.O. LIBS/EVUTIL_RAND.O libs/strlcpy.o. LIBS/POLL.O libs/epoll.o. libs/signal.o. Libs/event_ TAGGING.O. libs/http.o. libs/evdns.o. Libs/evrpc.o-lrt-o2-wl,-soname-wl,libevent-2.0.so.5-o. Libs/libevent-2.0.s o.5.1.9 "Creating soft links to libevent.so and libevent-2.0.so.5 to libevent-2.0.so.5.1.9" Libtool:link: (CD ". Libs" && rm-f "Libev Ent-2.0.so.5 "&& ln-s" libevent-2.0.so.5.1.9 "" Libevent-2.0.so.5 ") Libtool:link: (CD". Libs "&& Rm-f" Li Bevent.so "&& ln-s" libevent-2.0.so.5.1.9 "" libevent.so ")" Generate Libevent.a File "Libtool:link:ar cru. Libs/libevent. A event.o evthread.o buffer.o bufferevent.o BufferevENT_SOCK.O bufferevent_filter.o bufferevent_pair.o listener.o bufferevent_ratelim.o evmap.o log.o EVUTIL.O Evutil_ RAND.O strlcpy.o select.o poll.o epoll.o signal.o event_tagging.o http.o evdns.o evrpc.olibtool:link:ranlib. Libs/libeve Nt.alibtool:link: (CD ". Libs" && rm-f "libevent.la" && ln-s ". /libevent.la "libevent.la") "Generate libevent_core-2.0.so.5.1.9 File" Libtool:link:gcc-shared-fpic-dpic. libs/event.o. lib S/EVTHREAD.O. libs/buffer.o. LIBS/BUFFEREVENT.O libs/bufferevent_sock.o. libs/bufferevent_filter.o. libs/ BUFFEREVENT_PAIR.O. libs/listener.o. LIBS/BUFFEREVENT_RATELIM.O libs/evmap.o libs/log.o. libs/evutil.o. libs/ EVUTIL_RAND.O. libs/strlcpy.o. LIBS/SELECT.O libs/poll.o. libs/epoll.o. Libs/signal.o-lrt-o2-wl,-soname-wl,libev Ent_core-2.0.so.5-o. libs/libevent_core-2.0.so.5.1.9 "Establishing libevent_core.so and libevent_core-2.0.so.5 to Libevent_ core-2.0.so.5.1.9 Soft Link "Libtool:link: (CD". Libs "&& rm-f" libevent_core-2.0.so.5 "&& ln-s"libevent_core-2.0.so.5.1.9 "" Libevent_core-2.0.so.5 ") Libtool:link: (CD". Libs "&& rm-f" libevent_core.so " && ln-s "libevent_core-2.0.so.5.1.9" "libevent_core.so") "Generate Libevent_core.a File" Libtool:link:ar cru. libs/ Libevent_core.a event.o evthread.o buffer.o bufferevent.o bufferevent_sock.o bufferevent_filter.o bufferevent_pair.o LISTENER.O bufferevent_ratelim.o evmap.o log.o evutil.o evutil_rand.o strlcpy.o select.o poll.o epoll.o signal.olibtool: Link:ranlib. Libs/libevent_core.alibtool:link: (CD ". Libs" && rm-f "libevent_core.la" && ln-s ". /libevent_core.la "libevent_core.la") "Generate libevent_extra-2.0.so.5.1.9 File" Libtool:link:gcc-shared-fpic-dpic. libs/e VENT_TAGGING.O. libs/http.o. libs/evdns.o. Libs/evrpc.o-lrt-o2-wl,-soname-wl,libevent_extra-2.0.so.5-o. Libs/lib event_extra-2.0.so.5.1.9 "Creating soft links to libevent_extra.so and libevent_extra-2.0.so.5 to libevent_extra-2.0.so.5.1.9" Libtool: Link: (CD ". Libs" && rm-f "libevent_extra-2.0.so.5 "&& ln-s" libevent_extra-2.0.so.5.1.9 "" Libevent_extra-2.0.so.5 ") Libtool:link: (CD". Libs "& & Rm-f "libevent_extra.so" && ln-s "libevent_extra-2.0.so.5.1.9" "libevent_extra.so") "Generate LIBEVENT_EXTRA.A File "Libtool:link:ar cru. LIBS/LIBEVENT_EXTRA.A event_tagging.o http.o evdns.o evrpc.olibtool:link:ranlib. Libs/libeven T_extra.alibtool:link: (CD ". Libs" && rm-f "libevent_extra.la" && ln-s ". /libevent_extra.la "" libevent_extra.la ")" Generate libevent_pthreads-2.0.so.5.1.9 File "Libtool:link:gcc-shared-fpic-dpic. L Ibs/evthread_pthread.o-lrt-o2-wl,-soname-wl,libevent_pthreads-2.0.so.5-o. libs/libevent_pthreads-2.0.so.5.1.9 "built Libevent_pthreads.so and libevent_pthreads-2.0.so.5 to libevent_pthreads-2.0.so.5.1.9 soft link "Libtool:link: (CD". Libs "& amp;& rm-f "libevent_pthreads-2.0.so.5" && ln-s "libevent_pthreads-2.0.so.5.1.9" "Libevent_ Pthreads-2.0.so.5 ") Libtool:link: (CD". Libs "&& rm-f" LIBEVENT_PTHREADS.SO "&& ln-s" libevent_pthreads-2.0.so.5.1.9 "" libevent_pthreads.so ")" Generate Libevent_pthreads.a file "Libtool:link: Ar cru. Libs/libevent_pthreads.a evthread_pthread.olibtool:link:ranlib. Libs/libevent_pthreads.alibtool:link: (CD ". Libs "&& rm-f" libevent_pthreads.la "&& ln-s" ... /libevent_pthreads.la "" libevent_pthreads.la ")" Generate libevent_openssl-2.0.so.5.1.9 file "Libtool:link:gcc-shared-fpic- Dpic. Libs/bufferevent_openssl.o-lssl-lcrypto-lrt-o2-wl,-soname-wl,libevent_openssl-2.0.so.5-o. libs/libevent _openssl-2.0.so.5.1.9 "Build libevent_openssl.so and libevent_openssl-2.0.so.5 to libevent_openssl-2.0.so.5.1.9 soft links" Libtool:link: (CD ". Libs" && rm-f "libevent_openssl-2.0.so.5" && ln-s "libevent_openssl-2.0.so.5.1.9" " Libevent_openssl-2.0.so.5 ") Libtool:link: (CD". Libs "&& rm-f" libevent_openssl.so "&& ln-s" Libevent_o penssl-2.0.so.5.1.9 "libevent_openssl.so") "Generate Libevent_openssl.a File" Libtool:link:ar cru. Libs/libeVENT_OPENSSL.A bufferevent_openssl.olibtool:link:ranlib. Libs/libevent_openssl.alibtool:link: (CD ". Libs" & & Rm-f "libevent_openssl.la" && ln-s ". /libevent_openssl.la "" libevent_openssl.la ") ... [[email protected] libevent-2.0.21-stable]#

finally specify the Make install command

[email protected] libevent-2.0.21-stable]# make install ... (Install the library file into the system directory) ... (Change permissions and add index to. a files) [[email protected] libevent-2.0.21-stable]#

at this point, you can see that the generated file is already in the system.

[[email protected] ~]# updatedb[[email protected] ~]# Locate libevent.../usr/local/lib/libevent-2.0.so.5/ usr/local/lib/libevent-2.0.so.5.1.9/usr/local/lib/libevent.a/usr/local/lib/libevent.la/usr/local/lib/ libevent.so/usr/local/lib/libevent_core-2.0.so.5/usr/local/lib/libevent_core-2.0.so.5.1.9/usr/local/lib/ Libevent_core.a/usr/local/lib/libevent_core.la/usr/local/lib/libevent_core.so/usr/local/lib/libevent_ Extra-2.0.so.5/usr/local/lib/libevent_extra-2.0.so.5.1.9/usr/local/lib/libevent_extra.a/usr/local/lib/libevent _extra.la/usr/local/lib/libevent_extra.so/usr/local/lib/libevent_openssl-2.0.so.5/usr/local/lib/libevent_ Openssl-2.0.so.5.1.9/usr/local/lib/libevent_openssl.a/usr/local/lib/libevent_openssl.la/usr/local/lib/libevent _openssl.so/usr/local/lib/libevent_pthreads-2.0.so.5/usr/local/lib/libevent_pthreads-2.0.so.5.1.9/usr/local/ lib/libevent_pthreads.a/usr/local/lib/libevent_pthreads.la/usr/local/lib/libevent_pthreads.so/usr/local/lib/ Pkgconfig/libevent.pc/usr/local/lib/pkGconfig/libevent_openssl.pc/usr/local/lib/pkgconfig/libevent_pthreads.pc[[email protected] ~]# 

By organizing the Make output above, you will know what is included in compiling each library and what options are used

"Generate libevent-2.0.so.5.1.9 file"

Libtool:link:gcc-shared-fpic-dpic
. LIBS/EVENT.O
. LIBS/EVTHREAD.O
. LIBS/BUFFER.O
. LIBS/BUFFEREVENT.O
. LIBS/BUFFEREVENT_SOCK.O
. LIBS/BUFFEREVENT_FILTER.O
. LIBS/BUFFEREVENT_PAIR.O
. LIBS/LISTENER.O
. LIBS/BUFFEREVENT_RATELIM.O
. LIBS/EVMAP.O
. LIBS/LOG.O
. LIBS/EVUTIL.O
. LIBS/EVUTIL_RAND.O
. LIBS/STRLCPY.O
. LIBS/SELECT.O
. LIBS/POLL.O
. LIBS/EPOLL.O
. LIBS/SIGNAL.O
. LIBS/EVENT_TAGGING.O
. LIBS/HTTP.O
. LIBS/EVDNS.O
. LIBS/EVRPC.O  
-lrt-o2-wl,-soname-wl,libevent-2.0.so.5-o. libs/libevent-2.0.so.5.1.9


"Generate libevent_core-2.0.so.5.1.9 file"

Libtool:link:gcc-shared-fpic-dpic
. LIBS/EVENT.O
. LIBS/EVTHREAD.O
. LIBS/BUFFER.O
. LIBS/BUFFEREVENT.O
. LIBS/BUFFEREVENT_SOCK.O
. LIBS/BUFFEREVENT_FILTER.O
. LIBS/BUFFEREVENT_PAIR.O
. LIBS/LISTENER.O
. LIBS/BUFFEREVENT_RATELIM.O
. LIBS/EVMAP.O
. LIBS/LOG.O
. LIBS/EVUTIL.O
. LIBS/EVUTIL_RAND.O
. LIBS/STRLCPY.O
. LIBS/SELECT.O
. LIBS/POLL.O
. LIBS/EPOLL.O
. LIBS/SIGNAL.O
-lrt-o2-wl,-soname-wl,libevent_core-2.0.so.5-o. libs/libevent_core-2.0.so.5.1.9


"Generate libevent_extra-2.0.so.5.1.9 file"

Libtool:link:gcc-shared-fpic-dpic
. LIBS/EVENT_TAGGING.O
. LIBS/HTTP.O
. LIBS/EVDNS.O
. LIBS/EVRPC.O
-lrt-o2-wl,-soname-wl,libevent_extra-2.0.so.5-o. libs/libevent_extra-2.0.so.5.1.9


"Generate libevent_pthreads-2.0.so.5.1.9 file"

Libtool:link:gcc-shared-fpic-dpic
. LIBS/EVTHREAD_PTHREAD.O  
-lrt-o2-wl,-soname-wl,libevent_pthreads-2.0.so.5-o. libs/libevent_pthreads-2.0.so.5.1.9


"Generate libevent_openssl-2.0.so.5.1.9 file"
Libtool:link:gcc-shared-fpic-dpic
. LIBS/BUFFEREVENT_OPENSSL.O  
-lssl-lcrypto-lrt-o2-wl,-soname-wl,libevent_openssl-2.0.so.5-o. libs/libevent_openssl-2.0.so.5.1.9


as you can see from the content contained in the library file,
libevent = libevent_core + Libevent_extra

The libevent_pthreads and Libevent_openssl are two dedicated libraries.


people on the Web are given the following suggestions for use:

• Libevent the 2.0 release, it is recommended that you do not link the Libevent library directly, but that you should link libraries such as libevent_core and Libevent_extra as needed
• Libevent_core provides Event_base, Evbuffer, bufferevent, utility and other common methods
• Libevent_extra provides advanced features such as HTTP, DNS, and RPC
• If you use libevent in multiple threads, you also need to link the Libevent_pthreads library
• If SSL is used, you need to link the Libevent_openssl library again

"Original" source code compilation libevent-2.0.21-stable generated library file description