Buildroot Toolchain

配置工具链

Toolchain type (External toolchain) --->

 ( ) Buildroot toolchain
 ( ) External toolchain

外部交叉编译工具链配置

(X) External toolchain

手动移植工具链

参考文章 https://blog.csdn.net/zhou_chenz/article/details/52346134

自动下载配置

  Toolchain type (External toolchain)  --->                                                                                          		 
      *** Toolchain External Options ***                                                                                                  
      Toolchain (Custom toolchain)  --->                                                                                                  
      Toolchain origin (Toolchain to be downloaded and installed)  --->                                                                   
  (https://publishing-ap-linaro-org.s3.amazonaws.com/...)
  ($(ARCH)-linux-gnueabihf) Toolchain prefix                                                                                              
      External toolchain gcc version (5.x)  --->                                                                                          
      External toolchain kernel headers series (4.0.x)  --->                                                                              
      External toolchain C library (glibc/eglibc)  --->                                                                                   
  [*] Toolchain has SSP support?                                                                                                          
  [*] Toolchain has RPC support?                                                                                                          
  [*] Toolchain has C++ support?                                                                                                          
  ()  Extra toolchain libraries to be copied to target                                                                                    
  [ ] Copy gdb server to the Target                                                                                                       
      *** Host GDB Options ***                                                                                                            
  [ ] Build cross gdb for the host                                                                                                        
      *** Toolchain Generic Options ***                                                                                                   
  [ ] Copy gconv libraries                                                                                                                
  [*] Enable MMU support                                                                                                                  
  ()  Target Optimizations                                                                                                                
  ()  Target linker options                                                                                                               
  [ ] Register toolchain within Eclipse Buildroot plug-in

自动构建工具链

(X) Buildroot toolchain

   Toolchain type (Buildroot toolchain)  --->
     *** Toolchain Buildroot Options ***
 (100ask) custom toolchain vendor name
     C library (glibc)  --->
     *** Kernel Header Options ***
     Kernel Headers (Same as kernel being built)  --->
     Custom kernel headers series (4.1.x)  --->
     glibc version (2.23)  --->
     *** Binutils Options ***
     Binutils Version (binutils 2.26.1)  --->
 ()  Additional binutils options
     *** GCC Options ***
     GCC compiler Version (gcc 5.x)  --->
 ()  Additional gcc options
 [*] Enable C++ support
 [ ] Enable Fortran support
 [ ] Enable compiler link-time-optimization support
 [ ] Enable compiler OpenMP support
 [ ] Enable graphite support
     *** Host GDB Options ***
 [ ] Build cross gdb for the host
     *** Toolchain Generic Options ***
 [ ] Copy gconv libraries
 [*] Enable MMU support
 ()  Target Optimizations
 ()  Target linker options
 [ ] Register toolchain within Eclipse Buildroot plug-in

详细注释

Toolchain：工具链选项

 Toolchain type：Buildroot提供两种方式使用toolchain
     external toolthain：非Buildroot提供的交叉编译器
     Buildroot toolchain：Buildroot本身编译生成的Buildroot toolchain，直接选择此项
 custom toolchain vendor name：填上S3C2440
 C library：C库选择，选择 glibc
 Kernel Headers：内核头文件，Linux 4.9.x kernel headers
 glibc version：glibc版本选择，2.24
 Binutils Version：binutils版本：2.27
 Additional binutils options：附加的 binutils 选择，不填即可
 GCC compiler Version：GCC版本选择，gcc 6.x
 Additional gcc options：附件的GCC选项，不填写即可
 Enable C++ support：使能C++支持，选上
 Enable Fortran support：使能Fortran语言支持，不选
 Enable compiler link-time-optimization support：是否支持LTO，不选，LTO是什么：http://blog.csdn.net/fickyou/article/details/52381776
 Enable compiler OpenMP support：支持OpenMP？OpenMP用于共享内存并行系统的多处理器程序设计，OpenMP并不适合需要复杂的线程间同步和互斥的场合，OpenMp的另一个缺点是不能在非共享内存系统(如计算机集群)上使用。不选择
 Enable graphite support ：是否支持graphite。Graphite是应用WEB应用的一套开源的编程接口。不选择。具体看百度百科：https://baike.baidu.com/item/Graphite/9810474?fr=aladdin
 Build cross gdb for the host：主机上运行gdb进行调试，不选
 Copy gconv libraries：拷贝 gconv库，gconv库用于在不同字符集之间进行转换。默认不选即可
 Enable MMU support：使能 MMU，S3C2440支持MMU，选上
 Target Optimizations：不选
 Target linker options：不选
 Register toolchain within Eclipse Buildroot plug-in：eclipse插件支持，不选

参考网址

• Toolchain介绍 https://www.slideshare.net/anil_pugalia/toolchain-4566799
• linaro工具链下载地址 https://releases.linaro.org/components/toolchain/binaries/