Ubuntu20编译openwrt15报错及问题修改集锦
Ubuntu20编译openwrt15报错及问题修改集锦
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背景
最新换了台新电脑，以前电脑是ubuntu16环境，openwrt15编译通过，但是新电脑装的是Ubuntu20（Ubuntu16/18怎么都装不上，可能是电脑硬件较新驱动不支持的原因），再编译openwrt15编译不过了，以下是编译过程中遇到的问题及解决办法，最终成功编译出产物了（MT7628平台）。
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++
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
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编译报错（1）：
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/yang/Work/JS7628/openwrt_-js7628/build_dir/host/m4-1.4.17/lib'修改：
cd build_dir/host/m4-1.4.17/
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h参考：http://www.voycn.com/article/bianyimoujiyuopenwrtdesdk
编译报错（2）：
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:3414: lib/fseterr.o] Error 1
make[6]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/bison-3.0.2'修改：
cd build_dir/host/bison-3.0.2/
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h编译报错（3）：
cc -o make_ext4fs allocate.o canned_fs_config.o contents.o crc16.o ext4fixup.o ext4_sb.o ext4_utils.o extent.o indirect.o make_ext4fs_main.o make_ext4fs.o sha1.o uuid.o wipe.o libsparse/libsparse.a -lz
/bin/ld: contents.o: in function `make_special':
contents.c:(.text+0xbf7): undefined reference to `major'
/bin/ld: contents.c:(.text+0xc17): undefined reference to `minor'
collect2: error: ld returned 1 exit status
make[4]: *** [Makefile:24: make_ext4fs] Error 1
make[4]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/make-ext4fs-2015-05-01'
make[3]: *** [Makefile:37: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/make-ext4fs-2015-05-01/.built] Error 2修改：
vim build_dir/host/make-ext4fs-2015-05-01/contents.c 中添加 #include <sys/sysmacros.h>编译报错（4）：
/bin/ld: ../lib/libblkid.a(devname.o): in function `probe_all':
devname.c:(.text+0x888): undefined reference to `makedev'
/bin/ld: devname.c:(.text+0xb7e): undefined reference to `makedev'
/bin/ld: devname.c:(.text+0xc5b): undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make[6]: *** [Makefile:391: e2fsck] Error 1
make[6]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/e2fsprogs-1.42.8/e2fsck'修改：
vim build_dir/host/e2fsprogs-1.42.8/lib/blkid/devname.c 中添加 #include <sys/sysmacros.h>编译报错（5）：
LD mkfs.jffs2
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.o: in function `write_special_file':
/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:944: undefined reference to `major'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:944: undefined reference to `minor'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.o: in function `recursive_populate_directory':
/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:1273: undefined reference to `minor'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:1273: undefined reference to `major'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:1263: undefined reference to `minor'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:1263: undefined reference to `major'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.o: in function `interpret_table_entry':
/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:467: undefined reference to `makedev'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:503: undefined reference to `makedev'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c:510: undefined reference to `makedev'修改：
vim build_dir/host/mtd-utils-1.5.1/mkfs.jffs2.c 中添加 #include <sys/sysmacros.h>
vim build_dir/host/mtd-utils-1.5.1/ubi-utils/libubi.c 中添加 #include <sys/sysmacros.h>
vim build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/devtable.c 中添加 #include <sys/sysmacros.h>
vim build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.c 中添加 #include <sys/sysmacros.h>编译报错（6）：
make[4]: Entering directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1'
CHK include/version.h
CC mkfs.ubifs/devtable.o
CC mkfs.ubifs/hashtable/hashtable.o
CC mkfs.ubifs/hashtable/hashtable_itr.o
LD mkfs.ubifs/mkfs.ubifs
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.o: in function `add_dev_inode':
/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.c:1157: undefined reference to `minor'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.c:1157: undefined reference to `major'
/bin/ld: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.c:1157: undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make[4]: *** [common.mk:71: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs] Error 1
make[4]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1'
make[3]: *** [Makefile:56: /home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/mtd-utils-1.5.1/.built] Error 2
make[3]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/tools/mtd-utils'
make[2]: *** [tools/Makefile:123: tools/mtd-utils/compile] Error 2
make[2]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628'
make[1]: *** [tools/Makefile:121: /home/yang/Work/JS7628/openwrt_-js7628/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/stamp/.tools_install_yynyynynynyyyyyyyyynyyyyyyyyynyyyyynnyyynnyynnnyy] Error 2
make[1]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628'
make: *** [/home/yang/Work/JS7628/openwrt_-js7628/include/toplevel.mk:183: world] Error 2修改：
vim build_dir/host/mtd-utils-1.5.1/mkfs.ubifs/mkfs.ubifs.c 中添加 #include <sys/sysmacros.h>还有不少这样类似的未定义报错，都是类似的修改方法，在对应的文件中添加 #include <sys/sysmacros.h> 这里就不一一列出来了
编译报错（7）：
freadahead.c: In function 'freadahead':
freadahead.c:64:3: error: #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread on your system, then report this to bug-gnulib."
64 | #error "Please port gnulib freadahead.c to your platform! Look at the definition of fflush, fread on your system, then report this to bug-gnulib."
| ^~~~~
make[8]: *** [Makefile:890: freadahead.o] Error 1
make[8]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/findutils-4.4.2/gnulib/lib'
make[7]: *** [Makefile:696: all] Error 2
make[7]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/findutils-4.4.2/gnulib/lib'
make[6]: *** [Makefile:606: all-recursive] Error 1
make[6]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/findutils-4.4.2/gnulib'
make[5]: *** [Makefile:643: all-recursive] Error 1
make[5]: Leaving directory '/home/yang/Work/JS7628/openwrt_-js7628/build_dir/host/findutils-4.4.2'
make[4]: *** [Makefile:582: all] Error 2修改：
cd build_dir/host/findutils-4.4.2
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' gnulib/lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> gnulib/lib/stdio-impl.h
echo "#define _IO_ferror_unlocked" >> gnulib/lib/stdio-impl.h
sed -i '/unistd/a #include <sys/sysmacros.h>' gnulib/lib/mountlist.c这个问题仍然没有解决，然后更换findutils-4.4.2为findutils-4.6.0，继续报错如下：
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."
#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/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/findutils-4.6.0/gl/lib'
make[8]: *** [Makefile:2250: all-recursive] Error 1
make[8]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/findutils-4.6.0/gl/lib'
make[7]: *** [Makefile:1931: all] Error 2
make[7]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/findutils-4.6.0/gl/lib'
make[6]: *** [Makefile:1657: all-recursive] Error 1
make[6]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/findutils-4.6.0/gl'
make[5]: *** [Makefile:1706: all-recursive] Error 1修改：
cd build_dir/host/findutils-4.6.0
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> lib/stdio-impl.h
sed -i 's/IO_ftrylockfile/IO_EOF_SEEN/' gl/lib/*.c
echo "#define _IO_IN_BACKUP 0x100" >> gl/lib/stdio-impl.h
sed -i '/unistd/a #include <sys/sysmacros.h>' gl/lib/mountlist.c编译报错（8）：
/usr/bin/ld: cmListFileLexer.o: relocation R_X86_64_32S against `.rodata' can not be used when making a PIE object; recompile with -fPIE
/usr/bin/ld: ProcessUNIX.o: relocation R_X86_64_32 against `.rodata' can not be used when making a PIE object; recompile with -fPIE
collect2: error: ld returned 1 exit status
make[4]: *** [Makefile:2: cmake] Error 1
make[4]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/cmake-2.8.12.2/Bootstrap.cmk'
---------------------------------------------
Error when bootstrapping CMake:
Problem while running make
---------------------------------------------
Log of errors: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/cmake-2.8.12.2/Bootstrap.cmk/cmake_bootstrap.log
---------------------------------------------
make[3]: *** [Makefile:28: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/cmake-2.8.12.2/.configured] Error 9
make[3]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/tools/cmake'
make[2]: *** [tools/Makefile:123: tools/cmake/compile] Error 2
make[2]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628'
make[1]: *** [tools/Makefile:121: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/stamp/.tools_install_yynyynynynyyyyyyyyynyyyyyyyyynyyyyynnyyynnyynnnyy] Error 2
make[1]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628'
make: *** [/home/yang/Work/openwrt/JS7628/openwrt_-js7628/include/toplevel.mk:183: world] Error 2修改：
这个问题是我自己修改的（如果有更好的修改方法，请忽略这里的描述）：
修改cmake-2.8.12.2下的bootstrap文件，在第765行之后添加
cmake_c_flags="${CFLAGS} -fpic -fPIC -fpie -fPIE"
第815行之后添加
cmake_cxx_flags="${CXXFLAGS} -fpic -fPIC -fpie -fPIE"
其余文件有类似报错，只需要在对应路径下的CMakeLists.txt文件添加如下代码即可编译通过
foreach(lang C CXX)
set(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -Wno-format -fpic -fPIC -fpie -fPIE")
endforeach()编译报错（9）：
mksquashfs.c: In function 'create_inode':
mksquashfs.c:1372:29: error: called object 'major' is not a function or function pointer
unsigned int major = major(buf->st_rdev);
^
mksquashfs.c:1372:16: note: declared here
unsigned int major = major(buf->st_rdev);
^
mksquashfs.c:1373:29: error: called object 'minor' is not a function or function pointer
unsigned int minor = minor(buf->st_rdev);
^
mksquashfs.c:1373:16: note: declared here
unsigned int minor = minor(buf->st_rdev);
^
mksquashfs.c:1396:29: error: called object 'major' is not a function or function pointer
unsigned int major = major(buf->st_rdev);
^
mksquashfs.c:1396:16: note: declared here
unsigned int major = major(buf->st_rdev);
^
mksquashfs.c:1397:29: error: called object 'minor' is not a function or function pointer
unsigned int minor = minor(buf->st_rdev);
^
mksquashfs.c:1397:16: note: declared here
unsigned int minor = minor(buf->st_rdev);
^
mksquashfs.c: In function 'dir_scan2':
mksquashfs.c:3796:3: warning: implicit declaration of function 'makedev' [-Wimplicit-function-declaration]
buf.st_rdev = makedev(pseudo_ent->dev->major,修改：
vim build_dir/host/squashfs4.2/squashfs-tools/mksquashfs.c 添加 #include <sys/sysmacros.h>编译报错（10）：
gcc unsquashfs.o unsquash-1.o unsquash-2.o unsquash-3.o unsquash-4.o swap.o compressor.o gzip_wrapper.o lzma_xz_wrapper.o xz_wrapper.o lzma_xz_options.o /home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/host/lib/liblzma.a -lpthread -lm -lz -o unsquashfs
/usr/bin/ld: unsquashfs.o: in function `create_inode':
unsquashfs.c:(.text+0x2456): undefined reference to `makedev'
collect2: error: ld returned 1 exit status
make[4]: *** [Makefile:242: unsquashfs] Error 1
make[4]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/squashfs4.2/squashfs-tools'
make[3]: *** [Makefile:43: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/host/squashfs4.2/.built] Error 2
make[3]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/tools/squashfs4'
make[2]: *** [tools/Makefile:123: tools/squashfs4/compile] Error 2
make[2]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628'
make[1]: *** [tools/Makefile:121: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/stamp/.tools_install_yynyynynynyyyyyyyyynyyyyyyyyynyyyyynnyyynnyynnnyy] Error 2
make[1]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628'修改：
vim build_dir/host/squashfs4.2/squashfs-tools/unsquashfs.c 添加 #include <sys/sysmacros.h>编译报错（11）：
checking for the correct version of the gmp/mpfr/mpc libraries... no
configure: error: Building GCC requires GMP 4.2+, MPFR 2.4.0+ and MPC 0.8.0+.
Try the --with-gmp, --with-mpfr and/or --with-mpc options to specify
their locations. Source code for these libraries can be found at
their respective hosting sites as well as at
ftp://gcc.gnu.org/pub/gcc/infrastructure/. See also
http://gcc.gnu.org/install/prerequisites.html for additional info. If
you obtained GMP, MPFR and/or MPC from a vendor distribution package,
make sure that you have installed both the libraries and the header
files. They may be located in separate packages.
make[3]: *** [Makefile:47: /home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/gcc-linaro-4.8-2014.04-minimal/.configured] Error 1修改：
在tools下面其实本来就有gmp/mpfr/mpc这三个库的源码，只是我们采用默认的编译方式
make tools/gmp/compile V=s
make tools/mpfr/compile V=s
make tools/mpc/compile V=s
修改对应的tools/xxxx/Makefile（xxxx表示上述三个库）
增加配置参数
CFLAGS=-fPIE CPPFLAGS=-fPIE
在build_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/gcc-linaro-4.8-2014.04/configure
第5665行增加have_gmp=yes，
（这里是规避方法，不让报错，因为这三个库我们在上面是指定编译参数单独手动安装的）编译报错（12）：
In file included from /home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/gcc-linaro-4.8-2014.04/gcc/cp/except.c:1008:
cfns.gperf:101:1: error: 'const char* libc_name_p(const char*, unsigned int)' redeclared inline with 'gnu_inline' attribute
cfns.gperf:26:14: note: 'const char* libc_name_p(const char*, unsigned int)' previously declared here
cfns.gperf:26:14: warning: inline function 'const char* libc_name_p(const char*, unsigned int)' used but never defined
make[6]: *** [Makefile:1058: cp/except.o] Error 1修改：
//cfns.h 第55~56行中间插入
#ifdef __GNUC_STDC_INLINE__
__attribute__ ((__gnu_inline__))
#endif
//cfns.gperf 第24~25行中间插入
#ifdef __GNUC_STDC_INLINE__
__attribute__ ((__gnu_inline__))
#endif编译报错（13）：
make[6]: Entering directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src'
gawk -f ./mkerrnos.awk ./errnos.in >code-to-errno.h
gawk: ./mkerrnos.awk:86: warning: regexp escape sequence `\#' is not a known regexp operator
gawk -f ./mkerrcodes1.awk ./errnos.in >_mkerrcodes.h
gawk: ./mkerrcodes1.awk:84: warning: regexp escape sequence `\#' is not a known regexp operator
mipsel-openwrt-linux-uclibc-gcc -E -I/home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/usr/include -I/home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/include -I/home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/usr/include -I/home/yang/Work/openwrt/JS7628/openwrt_-js7628/staging_dir/toolchain-mipsel_24kec+dsp_gcc-4.8-linaro_uClibc-0.9.33.2/include _mkerrcodes.h | grep GPG_ERR_ | \
gawk -f ./mkerrcodes.awk >mkerrcodes.h
gawk: ./mkerrcodes.awk:88: warning: regexp escape sequence `\#' is not a known regexp operator
rm _mkerrcodes.h
cc -I. -I. -o mkerrcodes ./mkerrcodes.c
./mkerrcodes | gawk -f ./mkerrcodes2.awk >code-from-errno.h
gawk: ./mkerrcodes2.awk:94: warning: regexp escape sequence `\#' is not a known regexp operator
gawk -f ./mkstrtable.awk -v textidx=2 -v nogettext=1 \
./err-sources.h.in >err-sources-sym.h
gawk: ./mkstrtable.awk:113: warning: regexp escape sequence `\#' is not a known regexp operator
gawk -f ./mkstrtable.awk -v textidx=2 -v nogettext=1 \
./err-codes.h.in >err-codes-sym.h
gawk: ./mkstrtable.awk:113: warning: regexp escape sequence `\#' is not a known regexp operator
gawk -f ./mkstrtable.awk -v textidx=2 -v nogettext=1 \
-v prefix=GPG_ERR_ -v namespace=errnos_ \
./errnos.in >errnos-sym.h
gawk: fatal: cannot use gawk builtin `namespace' as variable name
make[6]: *** [Makefile:1020: errnos-sym.h] Error 2修改：
cd build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12
修改这几个文件：
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/lang/cl/mkerrcodes.awk
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkerrcodes.awk
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkerrcodes1.awk
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkerrcodes2.awk
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkerrnos.awk
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkstrtable.awk
分别找到如下代码：
!header {
sub (/\#.+/, "");
将上述所有文件中的所有"sub (/\#.+/, "");"，改为：“sub (/#.+/, "");”，也就是说最新的gawk能够识别到’#'号不需要使用转义字符（‘\‘）的帮助
找到，如下几个文件：
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/Makefile
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/Makefile.am
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/Makefile.in
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/mkstrtable.awk
打开上述文件，搜索“namespace”，将所有搜索到的结果替换为“pkg_namespace”编译报错（14）：
In file included from strerror-sym.c:30:0:
errnos-sym.h:318:1: error: redefinition of 'msgidxof'
msgidxof (int code)
^
In file included from strerror-sym.c:29:0:
err-codes-sym.h:548:1: note: previous definition of 'msgidxof' was here
msgidxof (int code)
^
make[7]: *** [Makefile:645: gpg_error-strerror-sym.o] Error 1
make[7]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src'
make[6]: *** [Makefile:386: all] Error 2
make[6]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src'修改：
该函数在头文件中重复定义了，注释掉一个即可
vim build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src/errnos-sym.h
#if 0
static GPG_ERR_INLINE int
msgidxof (int code)
{
return (0 ? 0
: ((code >= 0) && (code <= 140)) ? (code - 0)
: -1);
}
#endif编译报错（15）：
gpg_error-strerror-sym.o: In function `gpg_strerror_sym':
strerror-sym.c:(.text+0x20): undefined reference to `errnos_msgidxof'
collect2: error: ld returned 1 exit status
make[7]: *** [Makefile:506: gpg-error] Error 1
make[7]: Leaving directory '/home/yang/Work/openwrt/JS7628/openwrt_-js7628/build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/libgpg-error-1.12/src'
make[6]: *** [Makefile:386: all] Error 2修改：
函数未定义报错，修改为上述定义的函数即可。
//idx = errnos_msgidxof (code);
idx = msgidxof (code);
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