升级原因

安装saltstack出现报错：

Error: Package: PyYAML-3.11-1.el7.x86_64 (salt-latest)

Requires: libc.so.6(GLIBC_2.14)(64bit)

查看当前glibc版本：

# rpm -qa | grep glibc

glibc-headers-2.12-1.209.el6_9.2.x86_64

glibc-common-2.12-1.209.el6_9.2.x86_64

glibc-devel-2.12-1.209.el6_9.2.x86_64

glibc-2.12-1.209.el6_9.2.x86_64

查看当前系统中是否有libc.so.6模块以及支持glibc版本：

# find / -name libc.so.6

/lib64/libc.so.6

# strings /lib64/libc.so.6 | grep GLIB

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

最高支持GLIBC_2.12

升级glibc

官网 选择合适版本下载glibc

所需软件包

We recommend installing the following GNU tools before attempting to

build the GNU C Library:

* GNU 'make' 3.79 or newer

* GCC 4.9 or newer

* GNU 'binutils' 2.25 or later

* GNU 'texinfo' 4.7 or later

* GNU 'awk' 3.1.2, or higher

* Perl 5

* GNU 'sed' 3.02 or newer

* GNU 'autoconf' 2.69 (exactly)

* GNU 'gettext' 0.10.36 or later

* GNU 'bison' 2.7 or later

一般CentOS6自带的gcc都是4.4上下，如果需要更新到4.9及一上，可以查看《gcc 4.4.7 升级到4.9》

编译安装

创建编译目录

# mkdir -p Gcc/{gcc-src,gcc-obj}

gcc-src为源码文件路径，gcc-obj为编译路径

# cd Gcc/gcc-obj

# ../gcc-src/configure --prefix=/usr

checking build system type... x86_64-pc-linux-gnu

checking host system type... x86_64-pc-linux-gnu

checking target system type... x86_64-pc-linux-gnu

checking for a BSD-compatible install... /usr/bin/install -c

checking whether ln works... yes

checking whether ln -s works... yes

checking for a sed that does not truncate output... /bin/sed

checking for gawk... gawk

checking for libatomic support... yes

checking for libcilkrts support... yes

checking for libitm support... yes

checking for libsanitizer support... yes

checking for libvtv support... yes

checking for libmpx support... yes

checking for libhsail-rt support... yes

checking for gcc... gcc

checking for C compiler default output file name... a.out

checking whether the C compiler works... yes

checking whether we are cross compiling... no

checking for suffix of executables...

checking for suffix of object files... o

checking whether we are using the GNU C compiler... yes

checking whether gcc accepts -g... yes

checking for gcc option to accept ISO C89... none needed

checking for g++... g++

checking whether we are using the GNU C++ compiler... yes

checking whether g++ accepts -g... yes

checking whether g++ accepts -static-libstdc++ -static-libgcc... no

checking for gnatbind... no

checking for gnatmake... no

checking whether compiler driver understands Ada... no

checking how to compare bootstrapped objects... cmp --ignore-initial=16 $$f1 $$f2

checking for objdir... .libs

configure: WARNING: using in-tree isl, disabling version check

The following languages will be built: c,c++,fortran,lto,objc

*** This configuration is not supported in the following subdirectories:

gnattools gotools target-libada target-libhsail-rt target-libgo target-libffi target-liboffloadmic

(Any other directories should still work fine.)

checking for default BUILD_CONFIG...

checking for --enable-vtable-verify... no

/usr/bin/ld: cannot find crti.o: No such file or directory

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.4.7/libgcc_s.so when searching for -lgcc_s

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.4.7/libgcc_s.so when searching for -lgcc_s

/usr/bin/ld: cannot find -lgcc_s

/usr/bin/ld: cannot find -lc

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.4.7/libgcc_s.so when searching for -lgcc_s

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.4.7/libgcc_s.so when searching for -lgcc_s

/usr/bin/ld: cannot find -lgcc_s

/usr/bin/ld: cannot find crtn.o: No such file or directory

collect2: ld returned 1 exit status

configure: error: I suspect your system does not have 32-bit development libraries (libc and headers). If you have them, rerun configure with --enable-multilib. If you do not have them, and want to build a 64-bit-only compiler, rerun configure with --disable-multilib.

如果出现上面报错，可能由于没有装32bit lib库，添加--disable-multilib参数即可解决：

# ../gcc-src/configure --prefix=/usr ***--disable-multilib***

或者安装：

# yum install -y libgcc.i686 libgcc-devel.i686

安装

# make

# make install

- 其他报错

configure: error: `GMPLIBS' has changed since the previous run:

之前有编译过gcc，但是没有编译成功，解决办法：

删除gcc-obj目录，重新编译