c++ - 代码块 osx 快板

Question

我是 C++ 的新手，由于统一要求，我们都在使用代码块。我在 10.10.5 OS X 上使用它。现在我必须做一个使用 allegro5 库的项目，但我无法安装它!我花了很多时间尝试学习不同的教程，例如 http://partitionseven.blogspot.com/2011/01/compiling-allegro-5-with-mac-os-x-snow.html完全没有成功。有什么办法让它工作吗？

编辑

我在指定 clang 工具时首先遇到了一个问题——我的 mac 上没有这样的目录/Developer/usr/bin/clang。我只能直接在 finder 中找到 usr/bin/clang，但是文件夹 usr 是灰色的——这意味着什么吗？只有当我点击 Xcode->show contents 时，我才能找到这个路径/Developer/usr/bin/clang。所以这是第一件事，与教程中的不完全一样。我仍然能够运行 CMAKE，但我得到了这样的日志:

The C compiler identification is AppleClang 6.1.0.6020053
The CXX compiler identification is AppleClang 6.1.0.6020053
Check for working C compiler: /usr/bin/clang
Check for working C compiler: /usr/bin/clang -- works
Detecting C compiler ABI info
Detecting C compiler ABI info - done
Detecting C compile features
Detecting C compile features - done
Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
Detecting CXX compiler ABI info
Detecting CXX compiler ABI info - done
Detecting CXX compile features
Detecting CXX compile features - done
Could NOT find PkgConfig (missing:  PKG_CONFIG_EXECUTABLE) 
Check if the system is big endian
Searching 16 bit integer
Looking for sys/types.h
Looking for sys/types.h - found
Looking for stdint.h
Looking for stdint.h - found
Looking for stddef.h
Looking for stddef.h - found
Check size of unsigned short
Check size of unsigned short - done
Using unsigned short
Check if the system is big endian - little endian
Looking for include file dirent.h
Looking for include file dirent.h - found
Looking for include file inttypes.h
Looking for include file inttypes.h - found
Looking for include files sys/types.h, linux/joystick.h
Looking for include files sys/types.h, linux/joystick.h - not found
Looking for include file stdbool.h
Looking for include file stdbool.h - found
Looking for include file stdint.h
Looking for include file stdint.h - found
Looking for include file sys/io.h
Looking for include file sys/io.h - not found
Looking for include file sys/stat.h
Looking for include file sys/stat.h - found
Looking for include file sys/time.h
Looking for include file sys/time.h - found
Looking for include file time.h
Looking for include file time.h - found
Looking for include file sys/utsname.h
Looking for include file sys/utsname.h - found
Looking for include file sys/types.h
Looking for include file sys/types.h - found
Looking for include file soundcard.h
Looking for include file soundcard.h - not found
Looking for include file sys/soundcard.h
Looking for include file sys/soundcard.h - not found
Looking for include file machine/soundcard.h
Looking for include file machine/soundcard.h - not found
Looking for include file linux/soundcard.h
Looking for include file linux/soundcard.h - not found
Looking for include file libkern/OSAtomic.h
Looking for include file libkern/OSAtomic.h - found
Looking for include file sys/inotify.h
Looking for include file sys/inotify.h - not found
Looking for include file sys/timerfd.h
Looking for include file sys/timerfd.h - not found
Looking for getexecname
Looking for getexecname - not found
Looking for mkstemp
Looking for mkstemp - found
Looking for mmap
Looking for mmap - found
Looking for mprotect
Looking for mprotect - found
Looking for sched_yield
Looking for sched_yield - found
Looking for sysconf
Looking for sysconf - found
Looking for fseeko
Looking for fseeko - found
Looking for ftello
Looking for ftello - found
Check size of _Bool
Check size of _Bool - done
Performing Test ALLEGRO_HAVE_PROCFS_ARGCV
Performing Test ALLEGRO_HAVE_PROCFS_ARGCV - Failed
Performing Test ALLEGRO_HAVE_SV_PROCFS_H
Performing Test ALLEGRO_HAVE_SV_PROCFS_H - Failed
Performing Test ALLEGRO_HAVE_VA_COPY
Performing Test ALLEGRO_HAVE_VA_COPY - Success
Check if constructors are supported - yes
Found OpenGL: /System/Library/Frameworks/OpenGL.framework  
Looking for pthread.h
Looking for pthread.h - found
Looking for pthread_create
Looking for pthread_create - found
Found Threads: TRUE  
Found OpenAL: /System/Library/Frameworks/OpenAL.framework  
Found FLAC: /usr/local/include  
Performing Test FLAC_COMPILES
Performing Test FLAC_COMPILES - Success
Could NOT find DUMB (missing:  DUMB_INCLUDE_DIR DUMB_LIBRARY) 
WARNING: libdumb not found, disabling support. <http://dumb.sourceforge.net/>
Found VORBIS: /usr/local/include  
Performing Test VORBIS_COMPILES
Performing Test VORBIS_COMPILES - Success
Found Freetype: /usr/local/lib/libfreetype.dylib (found version "2.6.3") 
Found ZLIB: /usr/lib/libz.dylib (found version "1.2.8") 
Found PhysFS: /usr/local/lib/libphysfs.dylib  
Found PHYSFS: /usr/local/lib/libphysfs.dylib  
Performing Test PHYSFS_IMPLICIT_ZLIB
Performing Test PHYSFS_IMPLICIT_ZLIB - Success
Could NOT find LATEX (missing:  LATEX_COMPILER) 
Configuring done
CMake Warning (dev):
  Policy CMP0042 is not set: MACOSX_RPATH is enabled by default.  Run "cmake
  --help-policy CMP0042" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

  MACOSX_RPATH is not specified for the following targets:

   allegro
   allegro_acodec
   allegro_audio
   allegro_color
   allegro_dialog
   allegro_font
   allegro_image
   allegro_main
   allegro_memfile
   allegro_physfs
   allegro_primitives
   allegro_ttf

This warning is for project developers.  Use -Wno-dev to suppress it.

Generating done

CMake生成的文件是

MacBook-Air-ukasz:build lukasz$ ls
CMakeCache.txt      cmake_install.cmake include
CMakeFiles      demos           lib
Makefile        docs            tests
addons          examples

谢谢@MikeKinghan，看来我更进了一步——我没有收到错误。但是我打开了代码块，粘贴了示例代码(教程中的代码)，并且在编译时出现错误

g++   -c /Users/lukasz/Desktop/test_allegro/test.cpp -o /Users/lukasz/Desktop/test_allegro/test.o
g++  -o /Users/lukasz/Desktop/test_allegro/test /Users/lukasz/Desktop/test_allegro/test.o   
Undefined symbols for architecture x86_64:
  "_al_clear_to_color", referenced from:
      __al_mangled_main in test.o
  "_al_create_display", referenced from:
      __al_mangled_main in test.o
  "_al_destroy_display", referenced from:
      __al_mangled_main in test.o
  "_al_flip_display", referenced from:
      __al_mangled_main in test.o
  "_al_install_system", referenced from:
      __al_mangled_main in test.o
  "_al_map_rgb", referenced from:
      __al_mangled_main in test.o
  "_al_rest", referenced from:
      __al_mangled_main in test.o
  "_main", referenced from:
     implicit entry/start for main executable
     (maybe you meant: __al_mangled_main)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

编辑

当我使用

从终端运行测试应用程序时

gcc alleg5test.c -o alleg5test -L/usr/local/lib -lallegro -lallegro_main
./alleg5test

它起作用了——我得到了一个黑屏。所以可能我必须“用代码块加入图书馆。任何想法 - 我只找到了一个适用于 Windows 的教程。

Answer 1

由于 SO 限制，我无法回复，但有一种可能性:您的 Allegro 库是为 i386 构建的，不包括 x86_64 架构。您可以在命令行上检查库，但它不会总是告诉您您拥有什么，除非您同时拥有 i386 和 x86_64。你这样做:

文件 liballegro.a 或 文件 liballegro.dylib

如果它说的是关于 x86_64 的任何内容，那我就错了。如果不是，那可能是问题所在。然后您有两个选择:要么将 Allegro 构建为 x86_64，要么将您的程序构建为 i386。要将 Allegro 构建为 x86_64 和 i386，请将以下内容添加到您的 CMake 命令中，如下所示:

cmake .. -DCMAKE_OSX_ARCHITECTURES="x86_64;i386"...

或者只在 cmake-gui 中指定该变量。您可以通过删除它和分号来省略一个或另一个。

现在要构建具有特定架构的程序，如果您像链接的教程一样从命令行使用 gcc，请使用 -m 开关。要为 i386 构建，请使用 -m32 并为 x86_64 构建使用 -m64(或者您可以为两者都使用 -arch i386 -arch x86_64我相信(不确定，现在不在 Mac 上。)所以你的命令是:

gcc -m64 ... 其中 ... 与之前相同。