废话不多说，直接进入正题~~~

下载

使用git工具下载libmodbus库源码

git clone git://github.com/stephane/libmodbus

安装

下载好后会出现一个libmodbus的文件夹在当前目录下。

cd libmodbus

还需要安装libtool工具

 sudo apt-get install libtool

然后执行autogen.sh文件

./autogen.sh

khadas@Khadas:~/app/locke/libmodbus$ ./autogen.sh
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'build-aux'.
libtoolize: linking file 'build-aux/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: linking file 'm4/libtool.m4'
libtoolize: linking file 'm4/ltoptions.m4'
libtoolize: linking file 'm4/ltsugar.m4'
libtoolize: linking file 'm4/ltversion.m4'
libtoolize: linking file 'm4/lt~obsolete.m4'
configure.ac:33: installing 'build-aux/compile'
configure.ac:32: installing 'build-aux/missing'
src/Makefile.am: installing 'build-aux/depcomp'

------------------------------------------------------
Initialized build system. You can now run ./configure
------------------------------------------------------

成功！

接着配置，在libmodbus文件夹里新建一个install文件夹用来存放编译生成的相关文件。

mkdir install

./configure --prefix=/home/khadas/app/locke/libmodbus/install

/home/khadas/app/locke/libmodbus/install为安装路径

输出结果为

checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking how to create a pax tar archive... gnutar
checking whether make supports the include directive... yes (GNU style)
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking whether gcc understands -c and -o together... yes
checking dependency style of gcc... gcc3
checking for gcc option to accept ISO C99... none needed
checking for gcc option to accept ISO Standard C... (cached) none needed
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking minix/config.h usability... no
checking minix/config.h presence... no
checking for minix/config.h... no
checking whether it is safe to define __EXTENSIONS__... yes
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking whether make supports nested variables... (cached) yes
checking build system type... aarch64-unknown-linux-gnu
checking host system type... aarch64-unknown-linux-gnu
checking how to print strings... printf
checking for a sed that does not truncate output... /usr/bin/sed
checking for fgrep... /usr/bin/grep -F
checking for ld used by gcc... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert aarch64-unknown-linux-gnu file names to aarch64-unknown-linux-gnu format... func_convert_file_noop
checking how to convert aarch64-unknown-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc object... ok
checking for sysroot... no
checking for a working dd... /usr/bin/dd
checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1
checking for mt... mt
checking if mt is a manifest tool... no
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc supports -fno-rtti -fno-exceptions... no
checking for gcc option to produce PIC... -fPIC -DPIC
checking if gcc PIC flag -fPIC -DPIC works... yes
checking if gcc static flag -static works... yes
checking if gcc supports -c -o file.o... yes
checking if gcc supports -c -o file.o... (cached) yes
checking whether the gcc linker (/usr/bin/ld) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking arpa/inet.h usability... yes
checking arpa/inet.h presence... yes
checking for arpa/inet.h... yes
checking byteswap.h usability... yes
checking byteswap.h presence... yes
checking for byteswap.h... yes
checking errno.h usability... yes
checking errno.h presence... yes
checking for errno.h... yes
checking fcntl.h usability... yes
checking fcntl.h presence... yes
checking for fcntl.h... yes
checking limits.h usability... yes
checking limits.h presence... yes
checking for limits.h... yes
checking linux/serial.h usability... yes
checking linux/serial.h presence... yes
checking for linux/serial.h... yes
checking netdb.h usability... yes
checking netdb.h presence... yes
checking for netdb.h... yes
checking netinet/in.h usability... yes
checking netinet/in.h presence... yes
checking for netinet/in.h... yes
checking netinet/tcp.h usability... yes
checking netinet/tcp.h presence... yes
checking for netinet/tcp.h... yes
checking sys/ioctl.h usability... yes
checking sys/ioctl.h presence... yes
checking for sys/ioctl.h... yes
checking sys/params.h usability... no
checking sys/params.h presence... no
checking for sys/params.h... no
checking sys/socket.h usability... yes
checking sys/socket.h presence... yes
checking for sys/socket.h... yes
checking sys/time.h usability... yes
checking sys/time.h presence... yes
checking for sys/time.h... yes
checking for sys/types.h... (cached) yes
checking termios.h usability... yes
checking termios.h presence... yes
checking for termios.h... yes
checking time.h usability... yes
checking time.h presence... yes
checking for time.h... yes
checking for unistd.h... (cached) yes
checking for asciidoc... no
checking for xmlto... no
checking whether to build documentation... no
configure: WARNING: The tools to build the documentation aren't installed
checking whether __CYGWIN__ is declared... no
checking for accept4... yes
checking for getaddrinfo... yes
checking for gettimeofday... yes
checking for inet_ntoa... yes
checking for select... yes
checking for socket... yes
checking for strerror... yes
checking for strlcpy... no
checking for inline... inline
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC -DPIC
checking if g++ PIC flag -fPIC -DPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (/usr/bin/ld) supports shared libraries... yes
checking dynamic linker characteristics... (cached) GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking for int64_t... yes
checking for size_t... yes
checking for ssize_t... yes
checking for uint16_t... yes
checking for uint32_t... yes
checking for uint8_t... yes
checking winsock2.h usability... no
checking winsock2.h presence... no
checking for winsock2.h... no
checking whether TIOCSRS485 is declared... yes
checking whether TIOCM_RTS is declared... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating src/Makefile
config.status: creating src/modbus-version.h
config.status: creating src/win32/modbus.dll.manifest
config.status: creating tests/Makefile
config.status: creating doc/Makefile
config.status: creating libmodbus.pc
config.status: creating config.h
config.status: creating tests/unit-test.h
config.status: executing depfiles commands
config.status: executing libtool commands

        libmodbus 3.1.6
        ===============

        prefix:                 /home/khadas/app/locke/libmodbus/install
        sysconfdir:             ${prefix}/etc
        libdir:                 ${exec_prefix}/lib
        includedir:             ${prefix}/include

        compiler:               gcc
        cflags:                 -g -O2
        ldflags:

        documentation:          no
        tests:                  yes

下一步，make&&make install

make
make install

输出结果为

Making install in src
 /usr/bin/mkdir -p '/home/luo/locke/libmodbus/libmodbus/install/lib'
 /bin/bash ../libtool   --mode=install /usr/bin/install -c   libmodbus.la '/home/luo/locke/libmodbus/libmodbus/install/lib'
libtool: install: /usr/bin/install -c .libs/libmodbus.so.5.1.0 /home/luo/locke/libmodbus/libmodbus/install/lib/libmodbus.so.5.1.0
libtool: install: (cd /home/luo/locke/libmodbus/libmodbus/install/lib && { ln -s -f libmodbus.so.5.1.0 libmodbus.so.5 || { rm -f libmodbus.so.5 && ln -s libmodbus.so.5.1.0 libmodbus.so.5; }; })
libtool: install: (cd /home/luo/locke/libmodbus/libmodbus/install/lib && { ln -s -f libmodbus.so.5.1.0 libmodbus.so || { rm -f libmodbus.so && ln -s libmodbus.so.5.1.0 libmodbus.so; }; })
libtool: install: /usr/bin/install -c .libs/libmodbus.lai /home/luo/locke/libmodbus/libmodbus/install/lib/libmodbus.la
libtool: finish: PATH="/home/luo/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/sbin" ldconfig -n /home/luo/locke/libmodbus/libmodbus/install/lib
----------------------------------------------------------------------
Libraries have been installed in:
   /home/luo/locke/libmodbus/libmodbus/install/lib

If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the '-LLIBDIR'
flag during linking and do at least one of the following:
   - add LIBDIR to the 'LD_LIBRARY_PATH' environment variable
     during execution
   - add LIBDIR to the 'LD_RUN_PATH' environment variable
     during linking
   - use the '-Wl,-rpath -Wl,LIBDIR' linker flag
   - have your system administrator add LIBDIR to '/etc/ld.so.conf'

See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
 /usr/bin/mkdir -p '/home/luo/locke/libmodbus/libmodbus/install/include/modbus'
 /usr/bin/install -c -m 644 modbus.h modbus-version.h modbus-rtu.h modbus-tcp.h '/home/luo/locke/libmodbus/libmodbus/install/include/modbus'
Making install in doc
make[2]: 对“install-exec-am”无需做任何事。
Making install in tests
make[2]: 对“install-exec-am”无需做任何事。
make[2]: 对“install-data-am”无需做任何事。
make[2]: 对“install-exec-am”无需做任何事。
 /usr/bin/mkdir -p '/home/luo/locke/libmodbus/libmodbus/install/share/doc/libmodbus'
 /usr/bin/install -c -m 644 MIGRATION README.md AUTHORS NEWS '/home/luo/locke/libmodbus/libmodbus/install/share/doc/libmodbus'
 /usr/bin/mkdir -p '/home/luo/locke/libmodbus/libmodbus/install/lib/pkgconfig'
 /usr/bin/install -c -m 644 libmodbus.pc '/home/luo/locke/libmodbus/libmodbus/install/lib/pkgconfig'

编译成功后，在刚刚创建的install文件夹下，会输出include头文件以及lib库文件，将lib下的3个动态库libmodbus.so.x.x，项目所在环境的/usr/lib目录

sudo cp -r lib/libmodbus.so* /usr/lib

使用：

在项目makefile文件中 -L./lib -lmodbus 在调用函数的c文件中引入.h文件