【Linux】tar.xz的解压命令
对于不熟悉的东西，先记下来再说。
今天下载到了一份tar.xz结尾的压缩文件，需要解压的话，有两种方式：
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// 可以看到这个压缩包也是打包后再压缩，外面是xz压缩方式，里层是tar打包方式。
$ xz -d
*
*
*.tar.xz
$ tar -xvf
*
*
*.tar
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解决libc.so.6: version `GLIBC_2.14' not found问题
0.以下在系统CentOS 6.3 x86_64上操作
1.试图运行程序，提示"libc.so.6: version `GLIBC_2.14' not found",原因是系统的glibc版本太低，软件编译时使用了较高版本的glibc引起的：
[ghui@StuOS bin]$ pwd /var/VMdisks/cross/mingw32/bin [ghui@StuOS bin]$ ls lrelease QtCore4.dll QtNetwork4.dll QtSql4.dll QtXml4.dll moc QtDeclarative4.dll QtOpenGL4.dll QtSvg4.dll rcc phonon4.dll QtGui4.dll QtScript4.dll QtTest4.dll uic qmake QtMultimedia4.dll QtScriptTools4.dll QtWebKit4.dll [ghui@StuOS bin]$ ./qmake ./qmake: /lib64/libc.so.6: version `GLIBC_2.14' not found (required by ./qmake)
[ghui@StuOS bin]$ strings /lib64/libc.so.6 |grep GLIBC_ GLIBC_2.2.5 GLIBC_2.2.6 GLIBC_2.3 GLIBC_2.3.2 GLIBC_2.3.3 GLIBC_2.3.4 GLIBC_2.4 GLIBC_2.5 GLIBC_2.6 GLIBC_2.7 GLIBC_2.8 GLIBC_2.9 GLIBC_2.10 GLIBC_2.11 GLIBC_2.12 GLIBC_PRIVATE
[ghui@StuOS bin]$ rpm -qa |grep glibc glibc-static-2.12-1.80.el6_3.6.x86_64 glibc-headers-2.12-1.80.el6_3.6.x86_64 glibc-common-2.12-1.80.el6_3.6.x86_64 glibc-devel-2.12-1.80.el6_3.6.x86_64 glibc-static-2.12-1.80.el6_3.6.i686 glibc-devel-2.12-1.80.el6_3.6.i686 glibc-2.12-1.80.el6_3.6.i686 glibc-2.12-1.80.el6_3.6.x86_64
3.可以看到最高只支持2.12版本，所以考虑编译解决这个问题：
a. 到 http://www.gnu.org/software/libc/下载最新版本，我这里下载了 glibc-2.14.tar.xz 这个版本，解压到任意目录准备编译b.这里解压到/var/VMdisks/glibc-2.14/
[ghui@StuOS bin]$ cd /var/VMdisks/glibc-2.14/ [ghui@StuOS glibc-2.14]$ pwd /var/VMdisks/glibc-2.14 [ghui@StuOS glibc-2.14]$ ls abilist config.h.in intl README.libm abi-tags config.log io resolv aclocal.m4 config.make.in libc-abis resource aout configure libidn rt argp configure.in libio Rules assert conform LICENSES scripts autom4te.cache CONFORMANCE locale setjmp bits COPYING localedata shadow BUGS COPYING.LIB login shlib-versions build cppflags-iterator.mk mach signal CANCEL-FCT-WAIVE crypt Makeconfig socket CANCEL-FILE-WAIVE csu Makefile soft-fp catgets ctype Makefile.in stdio-common ChangeLog debug Makerules stdlib ChangeLog.1 dirent malloc streams ChangeLog.10 dlfcn manual string ChangeLog.11 elf math sunrpc ChangeLog.12 extra-lib.mk misc sysdeps ChangeLog.13 extra-modules.mk NAMESPACE sysvipc ChangeLog.14 FAQ NEWS termios ChangeLog.15 FAQ.in nis test-skeleton.c ChangeLog.16 gmon NOTES time ChangeLog.17 gnulib nptl timezone ChangeLog.2 grp nptl_db tls.make.c ChangeLog.3 gshadow nscd version.h ChangeLog.4 hesiod nss Versions.def ChangeLog.5 hurd o-iterator.mk wcsmbs ChangeLog.6 iconv po wctype ChangeLog.7 iconvdata posix WUR-REPORT ChangeLog.8 include PROJECTS ChangeLog.9 inet pwd conf INSTALL README
c.在glibc源码目录建立构建目录，并cd进入构建目录
[ghui@StuOS glibc-2.14]$ mkdir build
[ghui@StuOS glibc-2.14]$ cd build
d.运行configure配置，make && sudo make install
[ghui@StuOS build]$ ../configure --prefix=/opt/glibc-2.14 [ghui@StuOS build]$ make -j4 [ghui@StuOS build]$ sudo make install [sudo] password for ghui:
4.临时修改环境变量
[ghui@StuOS bin]$ export LD_LIBRARY_PATH=/opt/glibc-2.14/lib:$LD_LIBRARY_PATH
[ghui@StuOS glibc-2.14]$ cd /var/VMdisks/cross/mingw32/bin/
[ghui@StuOS bin]$ ./qmake Usage: ./qmake [mode] [options] [files] QMake has two modes, one mode for generating project files based on some heuristics, and the other for generating makefiles. Normally you shouldn't need to specify a mode, as makefile generation is the default mode for qmake, but you may use this to test qmake on an existing project ...
By ghui
00：10 - 2013-01-04