OpenWRT LEDE在Ubuntu22.04 编译全过程记录

预装各类工具

~/openwrt/lede $ sudo apt-get install gcc g++ build-essential asciidoc  binutils bzip2 gawk gettext git libncurses5-dev libz-dev patch flex bison make autoconf texinfo unzip sharutils subversion ncurses-term zlib1g-dev ccache upx lib32gcc-s1 libc6-dev-i386 uglifyjs git-core gcc-multilib p7zip p7zip-full msmtp libssl-dev libglib2.0-dev xmlto qemu-utils automake libtool  -y

更新订阅源

./scripts/feeds update -a
./scripts/feeds install -a

• 注， feeds用法

~/openwrt/lede/mtk-openwrt-lede-4.2.1.0 $ ./scripts/feeds -h
Usage: ./scripts/feeds <command> [options]

Commands:
        list [options]: List feeds, their content and revisions (if installed)
        Options:
            -n :            List of feed names.
            -s :            List of feed names and their URL.
            -r <feedname>:  List packages of specified feed.
            -d <delimiter>: Use specified delimiter to distinguish rows (default: spaces)
            -f :            List feeds in feeds.conf compatible format (when using -s).

        install [options] <package>: Install a package
        Options:
            -a :           Install all packages from all feeds or from the specified feed using the -p option.
            -p <feedname>: Prefer this feed when installing packages.
            -d <y|m|n>:    Set default for newly installed packages.
            -f :           Install will be forced even if the package exists in core OpenWrt (override)

        search [options] <substring>: Search for a package
        Options:
            -r <feedname>: Only search in this feed

        uninstall -a|<package>: Uninstall a package
        Options:
            -a :           Uninstalls all packages.

        update -a|<feedname(s)>: Update packages and lists of feeds in feeds.conf .
        Options:
            -a :           Update all feeds listed within feeds.conf. Otherwise the specified feeds will be updated.
            -i :           Recreate the index only. No feed update from repository is performed.
            -f :           Force updating feeds even if there are changed, uncommitted files.

        clean:             Remove downloaded/generated files.


/* 可以测试的指令 */
./scripts/feeds list -s  				/* 列出所有订阅源信息 */ 
./scripts/feeds list -r packages        /* 列出指定订阅源保护的全部package */

• 查看更新的订阅源信息，index file feeds/packages.index

~/openwrt/lede/mtk-openwrt-lede-4.2.1.0 $ ./scripts/feeds update -a
Updating feed 'packages' from 'https://git.lede-project.org/feed/packages.git;lede-17.01' ...
warning: redirecting to https://git.openwrt.org/feed/packages.git/
Already up to date.
Create index file './feeds/packages.index'
Updating feed 'luci' from 'https://git.lede-project.org/project/luci.git;lede-17.01' ...
warning: redirecting to https://git.openwrt.org/project/luci.git/
Already up to date.
Create index file './feeds/luci.index'
Updating feed 'routing' from 'https://git.lede-project.org/feed/routing.git;lede-17.01' ...
warning: redirecting to https://git.openwrt.org/feed/routing.git/
Already up to date.
Create index file './feeds/routing.index'
Updating feed 'telephony' from 'https://git.lede-project.org/feed/telephony.git;lede-17.01' ...
warning: redirecting to https://git.openwrt.org/feed/telephony.git/
Already up to date.
Create index file './feeds/telephony.index'
~/openwrt/lede/mtk-openwrt-lede-4.2.1.0 $

/* vim ./feeds/packages.index 第一行内容如下  */
Source-Makefile: feeds/packages/admin/debootstrap/Makefile
Package: debootstrap
Version: 1.0.87-1
Depends: +libc +SSP_SUPPORT:libssp +USE_GLIBC:librt +USE_GLIBC:libpthread +coreutils +coreutils-chroot +coreutils-sha1sum +ar +xz
Conflicts:
Menu-Depends:
Provides:
Section: admin
Category: Administration
Repository: base
Title: Bootstrap a basic Debian system
Maintainer: Daniel Golle <daniel@makrotopia.org>
Source: debootstrap-udeb_1.0.87_all.udeb
License: Unique
LicenseFiles: debian/copyright
Type: ipkg
Description:  debootstrap is used to create a Debian base system from scratch, without
 requiring the availability of dpkg or apt. It does this by downloading .deb
 files from a mirror site, and carefully unpacking them into a directory which
 can eventually be chrooted into.
http://wiki.debian.org/Debootstrap
Daniel Golle <daniel@makrotopia.org>
@@

预先下载dl库

make -j8 download V=s
下载 dl 库，编译固件

-j 后面是线程数，第一次编译推荐用单线程，$(nproc)可以获取机器的CPU线程数
# make download -j$(nproc)
make download -j8
make V=s -j1

====================================
文章作者： EamonZzz
文章来源： EamonZzz
文章链接： https://eamonzhang.com/archives/225
版权声明： 内容遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。

编译报错

【问题1】m4 编译错误

mv wctype.h-t wctype.h
make  all-am
make[7]: Entering directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
depbase=`echo gl_avltree_oset.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
gcc  -I.   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT gl_avltree_oset.o -MD -MP -MF $depbase.Tpo -c -o gl_avltree_oset.o gl_avltree_oset.c &&\
mv -f $depbase.Tpo $depbase.Po
depbase=`echo binary-io.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
gcc  -I.   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT binary-io.o -MD -MP -MF $depbase.Tpo -c -o binary-io.o binary-io.c &&\
mv -f $depbase.Tpo $depbase.Po
depbase=`echo c-ctype.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
gcc  -I.   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT c-ctype.o -MD -MP -MF $depbase.Tpo -c -o c-ctype.o c-ctype.c &&\
mv -f $depbase.Tpo $depbase.Po
depbase=`echo c-stack.o | sed 's|[^/]*$|.deps/&|;s|\.o$||'`;\
gcc  -I.   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT c-stack.o -MD -MP -MF $depbase.Tpo -c -o c-stack.o c-stack.c &&\
mv -f $depbase.Tpo $depbase.Po
In file included from /usr/include/signal.h:328,
                 from ./signal.h:52,
                 from c-stack.c:49:
c-stack.c:55:26: error: missing binary operator before token "("
   55 | #elif HAVE_LIBSIGSEGV && SIGSTKSZ < 16384
      |                          ^~~~~~~~
make[7]: *** [Makefile:1837: c-stack.o] Error 1
make[7]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[6]: *** [Makefile:1602: all] Error 2
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[5]: *** [Makefile:1506: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[4]: *** [Makefile:1461: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[3]: *** [Makefile:29: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4'
make[2]: *** [tools/Makefile:153: tools/m4/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2

解决，参考博文

cd tools/m4/patches
wget https://raw.githubusercontent.com/keyfour/openwrt/2722d51c5cf6a296b8ecf7ae09e46690403a6c3d/tools/m4/patches/011-fix-sigstksz.patch

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4/patches$ ls
100-fix-gets-removal.patch
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4/patches$ wget https://raw.githubusercontent.com/keyfour/openwrt/2722d51c5cf6a296b8ecf7ae09e46690403a6c3d/tools/m4/patches/011-fix-sigstksz.patch
--2023-06-29 17:05:49--  https://raw.githubusercontent.com/keyfour/openwrt/2722d51c5cf6a296b8ecf7ae09e46690403a6c3d/tools/m4/patches/011-fix-sigstksz.patch
Resolving raw.githubusercontent.com (raw.githubusercontent.com)... 185.199.111.133, 185.199.110.133, 185.199.109.133, ...
Connecting to raw.githubusercontent.com (raw.githubusercontent.com)|185.199.111.133|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 3257 (3.2K) [text/plain]
Saving to: ‘011-fix-sigstksz.patch’

011-fix-sigstksz.patch                                 100%[============================================================================================================================>]   3.18K  --.-KB/s    in 0s

2023-06-29 17:05:50 (25.1 MB/s) - ‘011-fix-sigstksz.patch’ saved [3257/3257]

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4/patches$ ls
011-fix-sigstksz.patch  100-fix-gets-removal.patch
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4/patches$

【问题2】 freadahead 异常

gcc  -I.   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT freadahead.o -MD -MP -MF $depbase.Tpo -c -o freadahead.o freadahead.c &&\
mv -f $depbase.Tpo $depbase.Po
freadahead.c: In function 'freadahead':
freadahead.c:91:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
   91 |  #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
      |   ^~~~~
make[7]: *** [Makefile:1837: freadahead.o] Error 1
make[7]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[6]: *** [Makefile:1602: all] Error 2
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[5]: *** [Makefile:1506: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[4]: *** [Makefile:1461: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[3]: *** [Makefile:29: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4'
make[2]: *** [tools/Makefile:153: tools/m4/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

解决，参考博文

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ cd build_dir/host/m4-1.4.17/
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17$ ls
acinclude.m4  AUTHORS  bootstrap  c-boxes.el  ChangeLog  config.guess  config.status  configure     COPYING  examples     INSTALL  m4        Makefile     Makefile.in  README  stamp-h  THANKS
aclocal.m4    BACKLOG  build-aux  cfg.mk      checks     config.log    config.sub     configure.ac  doc      GNUmakefile  lib      maint.mk  Makefile.am  NEWS         src     tests    TODO
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17$ sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17$ echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h

• 注意 ： 参考博文中的 _IO_IN_BAXKUP 应该为 _IO_IN_BACKUP ,否则会导致下述报错，此文为正确写法

mv -f $depbase.Tpo $depbase.Po
fflush.c: In function 'clear_ungetc_buffer_preserving_position':
fflush.c:42:20: error: '_IO_IN_BACKUP' undeclared (first use in this function)
   42 |   if (fp->_flags & _IO_IN_BACKUP)
      |                    ^~~~~~~~~~~~~
fflush.c:42:20: note: each undeclared identifier is reported only once for each function it appears in
make[7]: *** [Makefile:1837: fflush.o] Error 1
make[7]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[6]: *** [Makefile:1602: all] Error 2
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/lib'
make[5]: *** [Makefile:1506: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[4]: *** [Makefile:1461: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17'
make[3]: *** [Makefile:29: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/m4-1.4.17/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/m4'
make[2]: *** [tools/Makefile:153: tools/m4/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host$ rm -rf m4-1.4.17/
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host$

【问题3】 bison-3.0.4 相关错误

gcc    -I. -I./lib -I. -I./lib -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include  -MT lib/fseterr.o -MD -MP -MF $depbase.Tpo -c -o lib/fseterr.o lib/fseterr.c &&\
mv -f $depbase.Tpo $depbase.Po
lib/fseterr.c: In function 'fseterr':
lib/fseterr.c:77:3: error: #error "Please port gnulib fseterr.c to your platform! Look at the definitions of ferror and clearerr on your system, then report this to bug-gnulib."
   77 |  #error "Please port gnulib fseterr.c to your platform! Look at the definitions of ferror and clearerr on your system, then report this to bug-gnulib."
      |   ^~~~~
make[6]: *** [Makefile:3461: lib/fseterr.o] Error 1
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4'
make[5]: *** [Makefile:4522: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4'
make[4]: *** [Makefile:2625: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4'
make[3]: *** [Makefile:31: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/bison'
make[2]: *** [tools/Makefile:153: tools/bison/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

解决，参考博文

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ cd build_dir/host/bison-3.0.4
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4$ sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4$ echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h 
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/bison-3.0.4$

• 提示C++17不支持动态异常规格
  error: ISO C++17 does not allow dynamic exception specifications

make[6]: Entering directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35/src'
Making all in mklibs-readelf
make[7]: Entering directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35/src/mklibs-readelf'
x86_64-linux-gnu-g++ -DHAVE_CONFIG_H -I. -I../..   -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include   -g -O2 -MT elf.o -MD -MP -MF .deps/elf.Tpo -c -o elf.o elf.cpp
In file included from elf_data.hpp:24,
                 from elf.cpp:21:
elf.hpp:52:56: error: ISO C++17 does not allow dynamic exception specifications
   52 |       const section &get_section(unsigned int i) const throw (std::out_of_range) { return *sections.at(i); };
      |                                                        ^~~~~
elf.hpp:62:47: error: ISO C++17 does not allow dynamic exception specifications
   62 |       static file *open(const char *filename) throw (std::bad_alloc, std::runtime_error);
      |                                               ^~~~~
elf.hpp:65:38: error: ISO C++17 does not allow dynamic exception specifications
   65 |       file(uint8_t *mem, size_t len) throw (std::bad_alloc) : mem(mem), len(len) { }
      |                                      ^~~~~
elf.hpp:68:52: error: ISO C++17 does not allow dynamic exception specifications
   68 |         static file *open_class(uint8_t *, size_t) throw (std::bad_alloc, std::runtime_error);
      |                                                    ^~~~~
elf.hpp:131:55: error: ISO C++17 does not allow dynamic exception specifications
  131 |         std::string get_string(uint32_t offset) const throw (std::bad_alloc)
      |                                                       ^~~~~
elf.hpp:266:39: error: ISO C++17 does not allow dynamic exception specifications
  266 |       std::string get_version() const throw (std::bad_alloc);
      |                                       ^~~~~
elf.hpp:267:44: error: ISO C++17 does not allow dynamic exception specifications
  267 |       std::string get_version_file() const throw (std::bad_alloc);
      |                                            ^~~~~
elf.hpp:269:44: error: ISO C++17 does not allow dynamic exception specifications
  269 |       std::string get_name_version() const throw (std::bad_alloc);
      |                                            ^~~~~
elf.hpp:308:29: error: ISO C++17 does not allow dynamic exception specifications
  308 |       version_requirement() throw (std::bad_alloc);
      |                             ^~~~~
In file included from elf.cpp:21:
elf_data.hpp:97:42: error: ISO C++17 does not allow dynamic exception specifications
   97 |         file_data(uint8_t *, size_t len) throw (std::bad_alloc, std::runtime_error);
      |                                          ^~~~~
elf_data.hpp:112:43: error: ISO C++17 does not allow dynamic exception specifications
  112 |         virtual void update(const file &) throw (std::bad_alloc);
      |                                           ^~~~~
elf_data.hpp:136:41: error: ISO C++17 does not allow dynamic exception specifications
  136 |         section_real(Shdr *, uint8_t *) throw (std::bad_alloc);
      |                                         ^~~~~
elf_data.hpp:138:35: error: ISO C++17 does not allow dynamic exception specifications
  138 |         void update(const file &) throw (std::bad_alloc);
      |                                   ^~~~~
elf_data.hpp:150:41: error: ISO C++17 does not allow dynamic exception specifications
  150 |         section_real(Shdr *, uint8_t *) throw (std::bad_alloc);
      |                                         ^~~~~
elf_data.hpp:152:35: error: ISO C++17 does not allow dynamic exception specifications
  152 |         void update(const file &) throw (std::bad_alloc);
      |                                   ^~~~~
elf_data.hpp:164:41: error: ISO C++17 does not allow dynamic exception specifications
  164 |         section_real(Shdr *, uint8_t *) throw (std::bad_alloc);
      |                                         ^~~~~
elf_data.hpp:166:35: error: ISO C++17 does not allow dynamic exception specifications
  166 |         void update(const file &) throw (std::bad_alloc);
      |                                   ^~~~~
elf_data.hpp:178:41: error: ISO C++17 does not allow dynamic exception specifications
  178 |         section_real(Shdr *, uint8_t *) throw (std::bad_alloc);
      |                                         ^~~~~
elf_data.hpp:180:35: error: ISO C++17 does not allow dynamic exception specifications
  180 |         void update(const file &) throw (std::bad_alloc);
      |                                   ^~~~~
elf_data.hpp:192:41: error: ISO C++17 does not allow dynamic exception specifications
  192 |         section_real(Shdr *, uint8_t *) throw (std::bad_alloc);
      |                                         ^~~~~
elf_data.hpp:223:42: error: ISO C++17 does not allow dynamic exception specifications
  223 |         segment_real (Phdr *, uint8_t *) throw (std::bad_alloc);
      |                                          ^~~~~
elf_data.hpp:235:71: error: ISO C++17 does not allow dynamic exception specifications
  235 |         void update_string(const section_type<section_type_STRTAB> &) throw (std::bad_alloc);
      |                                                                       ^~~~~
elf_data.hpp:247:71: error: ISO C++17 does not allow dynamic exception specifications
  247 |         void update_string(const section_type<section_type_STRTAB> &) throw (std::bad_alloc);
      |                                                                       ^~~~~
elf_data.hpp:248:62: error: ISO C++17 does not allow dynamic exception specifications
  248 |         virtual void update_version (const file &, uint16_t) throw (std::bad_alloc);
      |                                                              ^~~~~
elf_data.hpp:260:71: error: ISO C++17 does not allow dynamic exception specifications
  260 |         void update_string(const section_type<section_type_STRTAB> &) throw (std::bad_alloc);
      |                                                                       ^~~~~
elf_data.hpp:272:71: error: ISO C++17 does not allow dynamic exception specifications
  272 |         void update_string(const section_type<section_type_STRTAB> &) throw (std::bad_alloc);
      |                                                                       ^~~~~
elf_data.hpp:283:71: error: ISO C++17 does not allow dynamic exception specifications
  283 |         void update_string(const section_type<section_type_STRTAB> &) throw (std::bad_alloc);
      |                                                                       ^~~~~
elf.cpp:39:41: error: ISO C++17 does not allow dynamic exception specifications
   39 | file *file::open (const char *filename) throw (std::bad_alloc, std::runtime_error)
      |                                         ^~~~~
elf.cpp:75:50: error: ISO C++17 does not allow dynamic exception specifications
   75 | file *file::open_class(uint8_t *mem, size_t len) throw (std::bad_alloc, std::runtime_error)
      |                                                  ^~~~~
elf.cpp:89:63: error: ISO C++17 does not allow dynamic exception specifications
   89 | file_data<_class, _data>::file_data(uint8_t *mem, size_t len) throw (std::bad_alloc, std::runtime_error)
      |                                                               ^~~~~
elf.cpp:191:60: error: ISO C++17 does not allow dynamic exception specifications
  191 | void section_data<_class, _data>::update(const file &file) throw (std::bad_alloc)
      |                                                            ^~~~~
elf.cpp:205:93: error: ISO C++17 does not allow dynamic exception specifications
  205 | section_real<_class, _data, section_type_DYNAMIC>::section_real(Shdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                                                                             ^~~~~
elf.cpp:222:82: error: ISO C++17 does not allow dynamic exception specifications
  222 | void section_real<_class, _data, section_type_DYNAMIC>::update(const file &file) throw (std::bad_alloc)
      |                                                                                  ^~~~~
elf.cpp:244:92: error: ISO C++17 does not allow dynamic exception specifications
  244 | section_real<_class, _data, section_type_DYNSYM>::section_real(Shdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                                                                            ^~~~~
elf.cpp:261:81: error: ISO C++17 does not allow dynamic exception specifications
  261 | void section_real<_class, _data, section_type_DYNSYM>::update(const file &file) throw (std::bad_alloc)
      |                                                                                 ^~~~~
elf.cpp:286:96: error: ISO C++17 does not allow dynamic exception specifications
  286 | section_real<_class, _data, section_type_GNU_VERDEF>::section_real(Shdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                                                                                ^~~~~
elf.cpp:308:85: error: ISO C++17 does not allow dynamic exception specifications
  308 | void section_real<_class, _data, section_type_GNU_VERDEF>::update(const file &file) throw (std::bad_alloc)
      |                                                                                     ^~~~~
elf.cpp:334:42: error: ISO C++17 does not allow dynamic exception specifications
  334 | section_real(Shdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                          ^~~~~
elf.cpp:356:86: error: ISO C++17 does not allow dynamic exception specifications
  356 | void section_real<_class, _data, section_type_GNU_VERNEED>::update(const file &file) throw (std::bad_alloc)
      |                                                                                      ^~~~~
elf.cpp:373:43: error: ISO C++17 does not allow dynamic exception specifications
  373 | section_real (Shdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                           ^~~~~
elf.cpp:400:93: error: ISO C++17 does not allow dynamic exception specifications
  400 | segment_real<_class, _data, segment_type_INTERP>::segment_real (Phdr *header, uint8_t *mem) throw (std::bad_alloc)
      |                                                                                             ^~~~~
elf.cpp:429:99: error: ISO C++17 does not allow dynamic exception specifications
  429 | void dynamic_data<_class, _data>::update_string(const section_type<section_type_STRTAB> &section) throw (std::bad_alloc)
      |                                                                                                   ^~~~~
elf.cpp:435:42: error: ISO C++17 does not allow dynamic exception specifications
  435 | std::string symbol::get_version () const throw (std::bad_alloc)
      |                                          ^~~~~
elf.cpp:445:47: error: ISO C++17 does not allow dynamic exception specifications
  445 | std::string symbol::get_version_file () const throw (std::bad_alloc)
      |                                               ^~~~~
elf.cpp:453:47: error: ISO C++17 does not allow dynamic exception specifications
  453 | std::string symbol::get_name_version () const throw (std::bad_alloc)
      |                                               ^~~~~
elf.cpp:478:98: error: ISO C++17 does not allow dynamic exception specifications
  478 | void symbol_data<_class, _data>::update_string(const section_type<section_type_STRTAB> &section) throw (std::bad_alloc)
      |                                                                                                  ^~~~~
elf.cpp:484:83: error: ISO C++17 does not allow dynamic exception specifications
  484 | void symbol_data<_class, _data>::update_version(const file &file, uint16_t index) throw (std::bad_alloc)
      |                                                                                   ^~~~~
elf.cpp:531:110: error: ISO C++17 does not allow dynamic exception specifications
  531 | void version_definition_data<_class, _data>::update_string(const section_type<section_type_STRTAB> &section) throw (std::bad_alloc)
      |                                                                                                              ^~~~~
elf.cpp:537:44: error: ISO C++17 does not allow dynamic exception specifications
  537 | version_requirement::version_requirement() throw (std::bad_alloc)
      |                                            ^~~~~
elf.cpp:561:65: error: ISO C++17 does not allow dynamic exception specifications
  561 | update_string(const section_type<section_type_STRTAB> &section) throw (std::bad_alloc)
      |                                                                 ^~~~~
elf.cpp:596:65: error: ISO C++17 does not allow dynamic exception specifications
  596 | update_string(const section_type<section_type_STRTAB> &section) throw (std::bad_alloc)
      |                                                                 ^~~~~
make[7]: *** [Makefile:387: elf.o] Error 1
make[7]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35/src/mklibs-readelf'
make[6]: *** [Makefile:440: all-recursive] Error 1
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35/src'
make[5]: *** [Makefile:364: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35'
make[4]: *** [Makefile:305: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35'
make[3]: *** [Makefile:35: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mklibs-0.1.35/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/mklibs'
make[2]: *** [tools/Makefile:153: tools/mklibs/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

原因：gcc版本过高，当前Ubuntu22.04安装的gcc版本如下

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 11.3.0-1ubuntu1~22.04.1' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-11 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=release --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-11-aYxV0E/gcc-11-11.3.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-aYxV0E/gcc-11-11.3.0/debian/tmp-gcn/usr --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.3.0 (Ubuntu 11.3.0-1ubuntu1~22.04.1)
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

**未解决**，参考博文, 降低gcc、g++版本，参考博文，注意 博文中使用update-alternatives添加g++的语句有误

snow@snow:~$ sudo apt-get install gcc-9
snow@snow:~$ sudo apt-get install g++-9
snow@snow:~$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 90
update-alternatives: using /usr/bin/gcc-9 to provide /usr/bin/gcc (gcc) in auto mode
snow@snow:~$ 
snow@snow:~$ sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 90
update-alternatives: using /usr/bin/g++-9 to provide /usr/bin/g++ (g++) in auto mode
snow@snow:~$
snow@snow:~$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.5.0-1ubuntu1~22.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-5Q4PKF/gcc-9-9.5.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-mutex
Thread model: posix
gcc version 9.5.0 (Ubuntu 9.5.0-1ubuntu1~22.04)
snow@snow:~$
snow@snow:~$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.5.0-1ubuntu1~22.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-5Q4PKF/gcc-9-9.5.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-build-config=bootstrap-lto-lean --enable-link-mutex
Thread model: posix
gcc version 9.5.0 (Ubuntu 9.5.0-1ubuntu1~22.04)
snow@snow:~$

备注：Ubuntu22.04 默认源无gcc5/g++5，需要手动添加源

sudo vim /etc/apt/sources.list
增加源
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

apt-get update时报错

~ $ sudo apt-get update
Hit:1 http://cn.archive.ubuntu.com/ubuntu jammy InRelease
Get:2 http://security.ubuntu.com/ubuntu jammy-security InRelease [110 kB]
Get:3 http://cn.archive.ubuntu.com/ubuntu jammy-updates InRelease [119 kB]
Get:4 http://cn.archive.ubuntu.com/ubuntu jammy-backports InRelease [108 kB]
Get:5 http://cn.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages [763 kB]
Get:6 http://security.ubuntu.com/ubuntu jammy-security/main amd64 DEP-11 Metadata [41.6 kB]
Get:7 http://cn.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages [437 kB]
Get:8 http://cn.archive.ubuntu.com/ubuntu jammy-updates/main amd64 DEP-11 Metadata [99.5 kB]
Get:9 http://cn.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 Packages [937 kB]
Get:10 http://cn.archive.ubuntu.com/ubuntu jammy-updates/universe i386 Packages [628 kB]
Get:11 http://cn.archive.ubuntu.com/ubuntu jammy-updates/universe amd64 DEP-11 Metadata [274 kB]
Get:12 http://cn.archive.ubuntu.com/ubuntu jammy-updates/multiverse amd64 DEP-11 Metadata [940 B]
Get:13 http://cn.archive.ubuntu.com/ubuntu jammy-backports/main amd64 DEP-11 Metadata [7,976 B]
Get:14 http://security.ubuntu.com/ubuntu jammy-security/universe amd64 DEP-11 Metadata [22.0 kB]
Get:15 http://cn.archive.ubuntu.com/ubuntu jammy-backports/universe amd64 DEP-11 Metadata [15.4 kB]
Get:16 http://dk.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Err:16 http://dk.archive.ubuntu.com/ubuntu xenial InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32

Reading package lists... Done
W: GPG error: http://dk.archive.ubuntu.com/ubuntu xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32
E: The repository 'http://dk.archive.ubuntu.com/ubuntu xenial InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
~ $
~ $

修复update报错，参考博文

~ $ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
Executing: /tmp/apt-key-gpghome.3mdTTn36QK/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 40976EAF437D05B5

gpg: key 40976EAF437D05B5: public key "Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
~ $
~ $
~ $ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
Executing: /tmp/apt-key-gpghome.pOLBIzcmLU/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32
gpg: key 3B4FE6ACC0B21F32: public key "Ubuntu Archive Automatic Signing Key (2012) <ftpmaster@ubuntu.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1
~ $
~ $
~ $
~ $ sudo apt-get update
Hit:1 http://security.ubuntu.com/ubuntu jammy-security InRelease
Hit:2 http://cn.archive.ubuntu.com/ubuntu jammy InRelease
Hit:3 http://cn.archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:4 http://cn.archive.ubuntu.com/ubuntu jammy-backports InRelease
Get:5 http://dk.archive.ubuntu.com/ubuntu xenial InRelease [247 kB]
Get:6 http://dk.archive.ubuntu.com/ubuntu xenial/main amd64 Packages [1,201 kB]
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~ $
~ $
~ $ sudo apt-get install g++-5 gcc-5 /* 即可安装成功 */

使用gcc version 5.3.1继续编译项目

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.3.1-14ubuntu2' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.3.1 20160413 (Ubuntu 5.3.1-14ubuntu2)

降低gcc/g++ 版本后，上述问题依旧存在，最后使用下述方法修复，参考博文1，参考博文2

解决，修改tools/mklibs/Makefile

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim tools/mklibs/Makefile
/*  Makefile的第21行添加如下内容 */
HOST_CPPFLAGS += -std=gnu++98

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ make -j1 V=s

【问题4】 mkfs.jffs2 相关问题

In function 'memset',
    inlined from 'invert_mat' at lib/libfec.c:421:5,
    inlined from 'build_decode_matrix' at lib/libfec.c:817:9,
    inlined from 'fec_decode' at lib/libfec.c:848:13:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:59:10: warning: '__builtin_memset' specified size between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
   59 |   return __builtin___memset_chk (__dest, __ch, __len,
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   60 |      __glibc_objsize0 (__dest));
      |      ~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:59:10: warning: '__builtin_memset' specified size between 18446744071562067968 and 18446744073709551615 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
  AR      lib/libmtd.a
  LD      mkfs.jffs2
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.o: in function `write_special_file':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:944: undefined reference to `major'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:944: undefined reference to `minor'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.o: in function `recursive_populate_directory':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:1273: undefined reference to `minor'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:1273: undefined reference to `major'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:1263: undefined reference to `minor'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:1263: undefined reference to `major'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.o: in function `interpret_table_entry':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:467: undefined reference to `makedev'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:503: undefined reference to `makedev'
/usr/bin/ld: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c:510: undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make[4]: *** [common.mk:81: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/mkfs.jffs2] Error 1
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2'
make[3]: *** [Makefile:56: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/mtd-utils-1.5.2/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/mtd-utils'
make[2]: *** [tools/Makefile:153: tools/mtd-utils/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

解决，在下述四个文件中添加#include <sys/sysmacros.h>，参考博文

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/mtd-utils-1.5.2/mkfs.jffs2.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/mtd-utils-1.5.2/ubi-utils/libubi.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/mtd-utils-1.5.2/mkfs.ubifs/devtable.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/mtd-utils-1.5.2/mkfs.ubifs/mkfs.ubifs.c

【问题5】 findutils-4.6.0 相关问题

mv -f $depbase.Tpo $depbase.Po
freadahead.c: In function 'freadahead':
freadahead.c:92:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
   92 |  #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread, ungetc on your system, then report this to bug-gnulib."
      |   ^~~~~
make[9]: *** [Makefile:2225: freadahead.o] Error 1
make[9]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0/gl/lib'
make[8]: *** [Makefile:2250: all-recursive] Error 1
make[8]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0/gl/lib'
make[7]: *** [Makefile:1931: all] Error 2
make[7]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0/gl/lib'
make[6]: *** [Makefile:1657: all-recursive] Error 1
make[6]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0/gl'
make[5]: *** [Makefile:1706: all-recursive] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0'
make[4]: *** [Makefile:1646: all] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0'
make[3]: *** [Makefile:21: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/findutils'
make[2]: *** [tools/Makefile:153: tools/findutils/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

解决，参考博文

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ cd build_dir/host/findutils-4.6.0
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$ sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$ echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$ sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' gl/lib/*.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$ echo "#define _IO_IN_BACKUP 0x100" >> gl/lib/stdio-impl.h
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$ sed -i '/unistd/a #include <sys/sysmacros.h>' gl/lib/mountlist.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/findutils-4.6.0$

【问题6】 squashfs4.2 相关问题

Applying ./patches/200-add-fixed-timestamp-option.patch using plaintext:
patching file squashfs-tools/mksquashfs.c
touch /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/.prepared08e88402b54b78c37ad607f89189542b
(cd /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/; if [ -x configure ]; then cp -fpR /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/scripts/config.{guess,sub} /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2// && CC="gcc" CFLAGS="-O2 -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include " CPPFLAGS="-I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/include " LDFLAGS="-L/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/lib -L/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/usr/lib " CONFIG_SHELL="/usr/bin/env bash"  bash ./configure --target=x86_64-linux-gnu --host=x86_64-linux-gnu --build=x86_64-linux-gnu --program-prefix="" --program-suffix="" --prefix=/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host --exec-prefix=/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host --sysconfdir=/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/etc --localstatedir=/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/var --sbindir=/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/bin ; fi )
touch /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/.configured
make -C /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/squashfs-tools CC="gcc" XZ_SUPPORT=1 LZMA_XZ_SUPPORT=1 XATTR_SUPPORT= LZMA_LIB="/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/lib/liblzma.a" EXTRA_CFLAGS="-I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include" mksquashfs unsquashfs
make[4]: Entering directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/squashfs-tools'
gcc -I/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/host/include -I. -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_GNU_SOURCE -DCOMP_DEFAULT=\"gzip\" -Wall -DGZIP_SUPPORT -DLZMA_SUPPORT -DXZ_SUPPORT   -c -o mksquashfs.o mksquashfs.c
mksquashfs.c: In function 'create_inode':
mksquashfs.c:1375:24: error: called object 'major' is not a function or function pointer
 1375 |   unsigned int major = major(buf->st_rdev);
      |                        ^~~~~
mksquashfs.c:1375:16: note: declared here
 1375 |   unsigned int major = major(buf->st_rdev);
      |                ^~~~~
mksquashfs.c:1376:24: error: called object 'minor' is not a function or function pointer
 1376 |   unsigned int minor = minor(buf->st_rdev);
      |                        ^~~~~
mksquashfs.c:1376:16: note: declared here
 1376 |   unsigned int minor = minor(buf->st_rdev);
      |                ^~~~~
mksquashfs.c:1399:24: error: called object 'major' is not a function or function pointer
 1399 |   unsigned int major = major(buf->st_rdev);
      |                        ^~~~~
mksquashfs.c:1399:16: note: declared here
 1399 |   unsigned int major = major(buf->st_rdev);
      |                ^~~~~
mksquashfs.c:1400:24: error: called object 'minor' is not a function or function pointer
 1400 |   unsigned int minor = minor(buf->st_rdev);
      |                        ^~~~~
mksquashfs.c:1400:16: note: declared here
 1400 |   unsigned int minor = minor(buf->st_rdev);
      |                ^~~~~
mksquashfs.c: In function 'dir_scan2':
mksquashfs.c:3805:17: warning: implicit declaration of function 'makedev' [-Wimplicit-function-declaration]
 3805 |   buf.st_rdev = makedev(pseudo_ent->dev->major,
      |                 ^~~~~~~
make[4]: *** [<builtin>: mksquashfs.o] Error 1
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/squashfs-tools'
make[3]: *** [Makefile:43: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/host/squashfs4.2/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/tools/squashfs4'
make[2]: *** [tools/Makefile:153: tools/squashfs4/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [tools/Makefile:150: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/target-mipsel_24kc_musl-1.1.16/stamp/.tools_install_yyynyyyyyynyyyyynyynnyyyyyyynyyyyyyyyyyyyyyyynyynynnyyynnny] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

解决，下述两个文件添加#include <sys/sysmacros.h>，参考博文

snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/squashfs4.2/squashfs-tools/mksquashfs.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$ vim build_dir/host/squashfs4.2/squashfs-tools/unsquashfs.c
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$

【问题】 gcc-5.4.0 相关问题

use of an operand of type ‘bool’ in ‘operator++’ is forbidden in C++17

/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/recog.h: In member function 'rtx_def* insn_gen_fn::operator()(rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx, rtx) const':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/recog.h:317:170: warning: cast between incompatible function types from 'insn_gen_fn::stored_funcptr' {aka 'rtx_def* (*)()'} to 'insn_gen_fn::f16' {aka 'rtx_def* (*)(rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*, rtx_def*)'} [-Wcast-function-type]
  317 |   rtx operator () (rtx a0, rtx a1, rtx a2, rtx a3, rtx a4, rtx a5, rtx a6, rtx a7, rtx a8, rtx a9, rtx a10, rtx a11, rtx a12, rtx a13, rtx a14, rtx a15) const { return ((f16)func) (a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15); }
      |                                                                                                                                                                          ^~~~~~~~~
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c: In function 'void init_reload()':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c:115:24: error: use of an operand of type 'bool' in 'operator++' is forbidden in C++17
  115 |   (this_target_reload->x_spill_indirect_levels)
      |   ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c:470:7: note: in expansion of macro 'spill_indirect_levels'
  470 |       spill_indirect_levels++;
      |       ^~~~~~~~~~~~~~~~~~~~~
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c: In function 'void elimination_effects(rtx, machine_mode)':
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c:3085:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
 3085 |       if (code == POST_MODIFY || code == PRE_MODIFY)
      |       ^~
/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0/gcc/reload1.c:3089:5: note: here
 3089 |     case STRICT_LOW_PART:
      |     ^~~~
make[5]: *** [Makefile:1065: reload1.o] Error 1
make[5]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0-initial/gcc'
make[4]: *** [Makefile:4101: all-gcc] Error 2
make[4]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0-initial'
make[3]: *** [Makefile:37: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/build_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/gcc-5.4.0-initial/.built] Error 2
make[3]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/toolchain/gcc/initial'
make[2]: *** [toolchain/Makefile:92: toolchain/gcc/initial/compile] Error 2
make[2]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make[1]: *** [toolchain/Makefile:89: /home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/staging_dir/toolchain-mipsel_24kc_gcc-5.4.0_musl-1.1.16/stamp/.toolchain_install] Error 2
make[1]: Leaving directory '/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0'
make: *** [/home/snow/openwrt/lede/mtk-openwrt-lede-4.2.1.0/include/toplevel.mk:199: world] Error 2
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$
snow@snow:~/openwrt/lede/mtk-openwrt-lede-4.2.1.0$