"net-snmp5.7.3 Transplant to Arm-linux platform"

net-snmp5.7.3 porting to the Arm-linux platform

This cross-compilation is performed under Ubuntu 15.04 64-bit systems.

Preparatory work

There are several preparations to complete before compiling the migration.

• 1 Download net-snmp 5.7.3 Source Package
• 2 Install the cross-compilation environment (ARM-LINUX-GNUEABI-GCC) using the command to sudo apt-get install gcc-arm-linux-gnueabi install.

Compiling the configuration

Unzip the NET-SNMP source package and enter the source package directory

 unzip net-snmp-5.7.3.zip  cd net-snmp-5.7.3/

There are those that can be used to ./configure --help view the configuration options. There is no post, give directly.

Options	Description
–host=arm-linux	Operating Platform
–target=arm-linux	Target platform
–build=i686-linux	Compiling the Platform
–with-cc=arm-linux-gcc	Cross-compilation tool
–with-ar=arm-linux-ar	Packaging tools to use
–prefix=/usr/local/net-snmp	installation directory
–disable-shared	Do not compile shared libraries
–disable-scripts	Do not install scripts such as MIB2C
–with-endianness=little	Specify the small-end mode
-enable-mini-agent	Minimize build agent
--disable-deprecated	Deprecated features are not compiled
--without-logfile	Specifies that SNMPD does not output a log file (you can use--with-logfile to specify the default log file location)
--disable-minimalist	Remove all non-basic code features
–enable-debugging	Open Debug Information
--disable-testing-code	Do not use test code (some code is not used)
–with-openssl=/opt/hardhat	OpenSSL library path (to support encryption, etc.)
–disable-ipv6	Do not use IPV6
–disable-manuals	Do not install the Manpage instructions page
–disable-ucd-snmp-compatibility	No compatible UCD-SNMP required
–disable-snmptrapd-subagent	No support for SNMPTRAPD's sub-agents
–disable-embedded-perl	The SNMP agent and SNMPTRAPD disable embedded Perl. Enabled by default
–disable-applications	Whether to turn off snmpget and other functions, choose according to your own needs
--with-default-snmp-version= "3"	Specifying the default protocol version
--enable-as-needed	Only links require libraries, not unnecessary libraries (if only other methods are not feasible, link libperl is for apps rather than NET-SNMP libraries.) ）

Here is the configuration I used

Configure

./configure --host=arm-linux --target=arm-linux --build=i686-linux  --with-cc=arm-linux-gnueabi-gcc-4.9 --with-ar=arm-linux-gnueabi-gcc-ar-4.9 --prefix=/usr/local/net-snmp --disable-shared --disable-scripts --with-endianness=little -enable-mini-agent --disable-ipv6 --disable-manuals  --disable-ucd-snmp-compatibility --enable-as-needed

When configuring, you can specify an empty directory to use as the installation directory, for example /home/o/123 . Then make you can install it after the success make install . When porting to the arm board, you can pack and copy the directory directly.

Configre successful output of the information

---------------------------------------------------------            Net-SNMP configuration summary:---------------------------------------------------------  SNMP Versions Supported:    1 2c 3  Building for:               linux  Net-SNMP Version:           5.7.3  Network transport support:  Callback Unix Alias TCP UDP IPv4Base SocketBase TCPBase UDPIPv4Base UDPBase  SNMPv3 Security Modules:     usm  Agent MIB code:            default_modules =>  snmpv3mibs mibII/snmp_mib mibII/system_mib mibII/sysORTable mibII/vacm_vars mibII/vacm_conf  MYSQL Trap Logging:         unavailable  Embedded Perl support:      disabled  SNMP Perl modules:          building -- not embeddable  SNMP Python modules:        disabled  Crypto support from:        internal  Authentication support:     MD5 SHA1  Encryption support:         DES AES  Local DNSSEC validation:    disabled---------------------------------------------------------

Compile

After the configuration is successful, compile with the make command. After the compilation succeeds, the following two lines are output.

chmod a+x net-snmp-configtouch net-snmp-config-x

After the compilation is complete, you can go to the agent folder to see if the file is exported snmpd .

[email protected]:~/snmp/net-snmp-5.7.3/agent$ ll snmpd-rwxrwxr-x 1 o o 3029820  9月 16 20:31 snmpd*[email protected]:~/snmp/net-snmp-5.7.3/agent$ file snmpdsnmpd: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, BuildID[sha1]=735ab05f48664e1af99c639e6519893be9413d2b, not stripped

Compress executable Files

After the compilation is ready to be used directly, but you can also compress to save space. Using arm-linux-gnueabi-strip programs to compress

[email protected]:~/snmp/net-snmp-5.7.3/agent$ arm-linux-gnueabi-strip snmpd[email protected]:~/snmp/net-snmp-5.7.3/agent$ ll snmpd-rwxrwxr-x 1 o o 703836  9月 16 20:51 snmpd*

As you can see, the size of the executable file after compression 3MB has been reduced from near to not 700KB .

Install to target platform

Once the compilation is successful, it can be installed on the target platform. First copy the agent files from the directory snmpd to the target machine. Then create the configuration file on the target machine snmpd.conf , how to configure, you can refer to the fifth part of Http://www.cnblogs.com/oloroso/p/4595123.html. Then you can start to try it.

sudo ./snmpd -c snmpd.conf  –f –Le –d

Problems and workarounds not in Perl library

Compile when there is no Perl library problem, this problem is also good to solve, compile one is. But, without this necessity, trouble.

/usr/lib/gcc-cross/arm-linux-gnueabi/4.9/../../../../arm-linux-gnueabi/bin/ld: cannot find -lperlcollect2: error: ld returned 1 exit statusMakefile:484: recipe for target ‘libnetsnmpagent.la‘ failedmake[1]: *** [libnetsnmpagent.la] Error 1make[1]: Leaving directory ‘/home/o/snmp/net-snmp-5.7.3/agent‘Makefile:656: recipe for target ‘subdirs‘ failedmake: *** [subdirs] Error 1

The solution is really simple, add configure a parameter to the previous configuration --disable-embedded-perl , and then make you can do it again.

"net-snmp5.7.3 Transplant to Arm-linux platform"