Mac OS 使用asio库

下载地址：http://sourceforge.net/projects/asio/files/asio/1.12.2%20%28Stable%29/

本人下载的版本：asio-1.12.2

1，本人环境：

dengzhongqiangdeMacBook-Pro:asio-1.12. dengzhongqiang$ clang -v
Apple LLVM version 10.0. (clang-1000.10.44.4)
Target: x86_64-apple-darwin18.5.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

2. cd到下载的库目录

dengzhongqiangdeMacBook-Pro:asio-1.12. dengzhongqiang$ ./configure
checking whether to enable maintainer-specific portions of Makefiles... no
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether UID '' is supported by ustar format... yes
checking whether GID '' is supported by ustar format... yes
checking how to create a ustar tar archive... gnutar
checking build system type... x86_64-apple-darwin18.5.0
checking host system type... x86_64-apple-darwin18.5.0
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 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 for ranlib... ranlib
checking how to run the C++ preprocessor... g++ -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 boost/noncopyable.hpp usability... yes
checking boost/noncopyable.hpp presence... yes
checking for boost/noncopyable.hpp... yes
checking openssl/ssl.h usability... no
checking openssl/ssl.h presence... no
checking for openssl/ssl.h... no
checking whether C++ is enabled... no
checking whether C++ is enabled... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating include/Makefile
config.status: creating src/Makefile
config.status: creating src/tests/Makefile
config.status: creating src/examples/cpp03/Makefile
config.status: creating src/examples/cpp11/Makefile
config.status: creating src/examples/cpp14/Makefile
config.status: creating src/examples/cpp17/Makefile
config.status: executing depfiles commands

3.执行make

dengzhongqiangdeMacBook-Pro:asio-1.12. dengzhongqiang$ make
Making all in include
make[]: Nothing to be done for `all'.
Making all in src
Making all in examples/cpp03
g++ -I./../../../include -g -O2 -ftemplate-depth-   -o icmp/ping icmp/ping.o
Undefined symbols for architecture x86_64:
  "boost::chrono::steady_clock::now()", referenced from:
      pinger::start_send() in ping.o
      asio::detail::timer_queue<asio::detail::chrono_time_traits<boost::chrono::steady_clock, asio::wait_traits<boost::chrono::steady_clock> > >::wait_duration_msec(long) const in ping.o
      asio::detail::timer_queue<asio::detail::chrono_time_traits<boost::chrono::steady_clock, asio::wait_traits<boost::chrono::steady_clock> > >::wait_duration_usec(long) const in ping.o
      asio::detail::timer_queue<asio::detail::chrono_time_traits<boost::chrono::steady_clock, asio::wait_traits<boost::chrono::steady_clock> > >::get_ready_timers(asio::detail::op_queue<asio::detail::scheduler_operation>&) in ping.o
      pinger::handle_receive(unsigned long) in ping.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code  (use -v to see invocation)
make[]: *** [icmp/ping] Error
make[]: *** [all-recursive] Error
make: *** [all-recursive] Error 

这里执行报错了。因为这个报错： boost::chrono::steady_clock::now()

分析：由于本人没有安装 boost，所以就没有这个api了。

解决办法：

1.安装boost库

brew install boost

然后执行

./configure --with-boost='/usr/local/include'

4.安装asio

make install