Compiler

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GCC/G++

• How to Install the Latest GCC on Windows

gcc/g++ Options

• -dumpmachine: print the compiler's target machine (for example, arm-linux-gnueabihf)

• -dM -E:

  • gcc -dM -E - < /dev/null: 显示所有预定义的宏

• 编译属性 __attribute__

Faster Compilers

• Compile faster with Ccache and Distcc
• Speeding Up Compilation with ccache and distcc

ccache: a fast C/C++ compiler cache

ccache is a compiler cache. It speeds up recompilation by caching previous compilations and detecting when the same compilation is being done again. Supported languages are C, C++, Objective-C and Objective-C++.

• install in Ubuntu

  Bash

  sudo apt install ccache
  

• CMake configuration:

  CMake

  # Configure CCache if available
  find_program(CCACHE_FOUND ccache)
  if(CCACHE_FOUND)
          set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE ccache)
          set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
  endif(CCACHE_FOUND)  
  

• Usage with Android NDK

  Bash

  export NDK_CCACHE=/usr/bin/ccache
  
  ndk-build -j9
  

• To see if ccache is really working, you can use ccache -s command, which will display ccache statistics, on second and all subsequent compilations the cache hit values should increase and thus show that ccache is working:

  Text Only

  cache directory                     /home/cg/.ccache
  primary config                      /home/cg/.ccache/ccache.conf
  secondary config      (readonly)    /etc/ccache.conf
  cache hit (direct)                     0
  cache hit (preprocessed)               0
  cache miss                             0
  files in cache                         0
  cache size                           0.0 kB
  max cache size                       5.0 GB
  

distcc: a fast, free distributed C/C++ compiler

distcc is a program to distribute builds of C, C++, Objective C or Objective C++ code across several machines on a network. distcc should always generate the same results as a local build, is simple to install and use, and is usually much faster than a local compile.