Buildroot工具链
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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
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
