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net-snmp靜態(tài)編譯鏈接的獲取程序及生成執(zhí)行程序詳解

 更新時(shí)間:2023年08月02日 09:33:03   作者:龔正陽(yáng)  
這篇文章主要介紹了net-snmp靜態(tài)編譯鏈接的獲取程序及生成執(zhí)行程序詳解,有需要的朋友可以借鑒參考下,希望能夠有所幫助,祝大家多多進(jìn)步,早日升職加薪

引言

由于在某些場(chǎng)景需要使用靜態(tài)鏈接的snmpwalk或者其他程序,為了方便執(zhí)行文件的分發(fā),適配多版本系統(tǒng),所以需要自己編譯net-snmp

實(shí)驗(yàn)操作系統(tǒng)Ubuntu22 amd64

獲取程序

git clone方式

$ git clone https://github.com/net-snmp/net-snmp.git

或者也可以依據(jù)tag下載源碼包

生成Makefile

net-snmp項(xiàng)目根路徑下面有一個(gè)configure文件,可以用于生成Makefile,命令執(zhí)行過(guò)程中會(huì)彈出一些輸入確認(rèn),直接回車(chē)確認(rèn)即可

$ ./configure --prefix=/tmp/snmp --disable-embedded-perl --without-perl-modules --disable-ucd-snmp-compatibility --disable-scripts

--prefix參數(shù)指定文件安裝目錄到/tmp/snmp

需要禁用perl相關(guān)模塊以及一些腳本,否則可能會(huì)遇到錯(cuò)誤如下

relocation R_X86_64_PC32 against symbol `netsnmp_ds_handle_config' can not be used when making a shared object; recompile with -fPIC

生成執(zhí)行程序

如果此時(shí)項(xiàng)目根目錄下面生成一個(gè)Makefile,則表示configure命令成功

執(zhí)行程序的源碼和生成的二進(jìn)制都在apps/目錄下

$ make LDFLAGS="-static"

校驗(yàn)生成的二進(jìn)制執(zhí)行文件,發(fā)現(xiàn)不是靜態(tài)鏈接的

$ ldd apps/snmpwalk
        linux-vdso.so.1 (0x00007ffed71c1000)
        libcrypto.so.3 => /lib/x86_64-linux-gnu/libcrypto.so.3 (0x00007ff639800000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff639400000)
        /lib64/ld-linux-x86-64.so.2 (0x00007ff639d7e000)

靜態(tài)編譯snmpwalk

發(fā)現(xiàn)在make snmpwalk執(zhí)行的時(shí)候會(huì)產(chǎn)生兩條執(zhí)行命令,第一條是 gcc包含-static參數(shù),但是第二條沒(méi)包含

$ cd apps
$ rm snmpwalk
$ make snmpwalk
/bin/bash ../libtool  --mode=link gcc  -static -g -O2 -DNETSNMP_ENABLE_IPV6 -fno-strict-aliasing -DNETSNMP_REMOVE_U64 -g -O2 -Ulinux -Dlinux=linux  -Wall -Wextra -Wstrict-prototypes -Wwrite-strings -Wcast-qual -Wimplicit-fallthrough -Wlogical-op -Wundef -Wno-format-truncation -Wno-missing-field-initializers -Wno-sign-compare -Wno-unused-parameter  -o snmpwalk snmpwalk.lo ../snmplib/libnetsnmp.la   
libtool: link: gcc -g -O2 -DNETSNMP_ENABLE_IPV6 -fno-strict-aliasing -DNETSNMP_REMOVE_U64 -g -O2 -Ulinux -Dlinux=linux -Wall -Wextra -Wstrict-prototypes -Wwrite-strings -Wcast-qual -Wimplicit-fallthrough -Wlogical-op -Wundef -Wno-format-truncation -Wno-missing-field-initializers -Wno-sign-compare -Wno-unused-parameter -o snmpwalk .libs/snmpwalk.o  ../snmplib/.libs/libnetsnmp.a -lm -lssl -lcrypto

所以需要執(zhí)行命令如下,把make snmpwalk的輸出的第二條命令粘貼下來(lái),手動(dòng)在gcc后面加上-static參數(shù)

$ rm snmpwalk
$ gcc -static -g -O2 -DNETSNMP_ENABLE_IPV6 -fno-strict-aliasing -DNETSNMP_REMOVE_U64 -g -O2 -Ulinux -Dlinux=linux -Wall -Wextra -Wstrict-prototypes -Wwrite-strings -Wcast-qual -Wimplicit-fallthrough -Wlogical-op -Wundef -Wno-format-truncation -Wno-missing-field-initializers -Wno-sign-compare -Wno-unused-parameter -o snmpwalk .libs/snmpwalk.o  ../snmplib/.libs/libnetsnmp.a -lm -lssl -lcrypto 
# 執(zhí)行的時(shí)候會(huì)產(chǎn)生告警信息如下,這是正常的
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/11/../../../x86_64-linux-gnu/libcrypto.a(libcrypto-lib-dso_dlfcn.o): in function `dlfcn_globallookup':
(.text+0x17): 警告: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/bin/ld: ../snmplib/.libs/libnetsnmp.a(system.o): in function `netsnmp_str_to_gid':
/home/gong/rust-work/github/net-snmp/snmplib/system.c:1492: 警告: Using 'getgrnam' in statically linked applications requires at runtime the shared libraries from the bc version used for linking
/usr/bin/ld: /home/gong/rust-work/github/net-snmp/snmplib/system.c:1494: 警告: Using 'endgrent' in statically linked applications requires at runtime the shared librar from the glibc version used for linking
/usr/bin/ld: ../snmplib/.libs/libnetsnmp.a(system.o): in function `netsnmp_str_to_uid':
/home/gong/rust-work/github/net-snmp/snmplib/system.c:1459: 警告: Using 'getpwnam' in statically linked applications requires at runtime the shared libraries from the bc version used for linking
/usr/bin/ld: /home/gong/rust-work/github/net-snmp/snmplib/system.c:1461: 警告: Using 'endpwent' in statically linked applications requires at runtime the shared librar from the glibc version used for linking
/usr/bin/ld: ../snmplib/.libs/libnetsnmp.a(system.o): in function `netsnmp_getaddrinfo':
/home/gong/rust-work/github/net-snmp/snmplib/system.c:884: 警告: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/bin/ld: ../snmplib/.libs/libnetsnmp.a(system.o): in function `netsnmp_gethostbyaddr':
/home/gong/rust-work/github/net-snmp/snmplib/system.c:1050: 警告: Using 'gethostbyaddr' in statically linked applications requires at runtime the shared libraries frome glibc version used for linking
/usr/bin/ld: ../snmplib/.libs/libnetsnmp.a(system.o): in function `netsnmp_gethostbyname':
/home/gong/rust-work/github/net-snmp/snmplib/system.c:980: 警告: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from  glibc version used for linking

檢查snmpwalk鏈接

$ ldd snmpwalk

 不是動(dòng)態(tài)可執(zhí)行文件

之后也可以把生成的snmpwalk復(fù)制到另外一臺(tái)古老的linux上運(yùn)行校驗(yàn),如果機(jī)器上有docker, 可以執(zhí)行命令docker run -it alpine sh,把snmpwalk復(fù)制到容器內(nèi)部執(zhí)行

以上就是net-snmp靜態(tài)編譯鏈接的獲取程序及生成執(zhí)行程序詳解的詳細(xì)內(nèi)容,更多關(guān)于net-snmp靜態(tài)編譯鏈接的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章!

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