Mac OS 使用asio庫

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

本人下載的版本：asio-1.12.2

1，本人環境：

dengzhongqiangdeMacBook-Pro:asio-1.12.2 dengzhongqiang$ clang -v
Apple LLVM version 10.0.0 (clang-1000.10.44.4)
Target: x86_64-apple-darwin18.5.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

2. cd到下載的庫目錄

dengzhongqiangdeMacBook-Pro:asio-1.12.2 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 '501' is supported by ustar format... yes
checking whether GID '20' 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++11 is enabled... no
checking whether C++14 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.執行make

dengzhongqiangdeMacBook-Pro:asio-1.12.2 dengzhongqiang$ make
Making all in include
make[1]: Nothing to be done for `all'.
Making all in src
Making all in examples/cpp03
g++ -I./../../../include -g -O2 -ftemplate-depth-256   -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 1 (use -v to see invocation)
make[2]: *** [icmp/ping] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1

這裏執行報錯了。由於這個報錯： boost::chrono::steady_clock::now()

分析：因爲本人沒有安裝 boost，因此就沒有這個api了。

解決辦法：

1.安裝boost庫

brew install boost

而後執行 

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

4.安裝asio

make install