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标题: 【openwrt】ubuntu20环境下编译openwrt15(Chaos Calmer)因GCC版本太... [打印本页]

作者: sunsili 时间: 2023-6-23 19:36
标题: 【openwrt】ubuntu20环境下编译openwrt15(Chaos Calmer)因GCC版本太...
【openwrt】ubuntu20环境下编译openwrt15(Chaos Calmer)因GCC版本太高而编译不通过

【现象】
编译出错提示：
In file included from include/linux/compiler.h:54,
from /home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10/arch/sandbox/include/asm/bitops.h:20,
from include/linux/bitops.h:110,
from /home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10/include/common.h:20:
include/linux/compiler-gcc.h:114:1: fatal error: linux/compiler-gcc9.h: No such file or directory
114 | #include gcc_header(GNUC)
| ^~~~
compilation terminated.
make[6]: *** [/home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10/scripts/Makefile.autoconf:64: include/autoconf.mk] Error 1
make[5]: *** [/home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10/Makefile:464: silentoldconfig] Error 1
make[4]: *** No rule to make target 'include/config/auto.conf', needed by 'include/config/uboot.release'.  Stop.
make[4]: Leaving directory '/home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10'
make[3]: *** [Makefile:48: /home/fan/openwrt_CC_mt76xx_zhuotk_source/build_dir/host/u-boot-2014.10/.built] Error 2

【原因】
ubuntu20默认的gcc9版本太高了，怕有其它问题，所以首先我是将gcc进行降版本，并切换为gcc-4.8
Ubuntu20.04终端安装、切换低版本gcc/g++

【解决方法】
增加源
sudo vim /etc/apt/sources.list
添加
deb http://dk.archive.ubuntu.com/ubuntu/ xenial main
deb http://dk.archive.ubuntu.com/ubuntu/ xenial universe

更新源
sudo apt-get update
安装gcc5，g++5
sudo apt-get install g++-5 gcc-5
安装gcc4，g++4
sudo apt-get install g++-4.8 gcc-4.8
设置优先级
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 40
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/g++-4.8 40
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 50
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/g++-5 50
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/g++-9 90
选择gcc版本
sudo update-alternatives --config gcc
There are 6 choices for the alternative gcc (providing /usr/bin/gcc).

  Selection Path             Priority Status
------------------------------------------------------------
  0          /usr/bin/g++-9    90       auto mode
  1          /usr/bin/g++-4.8 40       manual mode
  2          /usr/bin/g++-5    50       manual mode
  3          /usr/bin/g++-9    90       manual mode
  4          /usr/bin/gcc-4.8 40       manual mode
* 5          /usr/bin/gcc-5    50       manual mode
  6          /usr/bin/gcc-9    90       manual mode

Press <enter> to keep the current choice, or type selection number: 5
我选择的是gcc-5

实践证明：用此版本的gcc 是可以编译通过的。

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