Shulou(Shulou.com)06/02 Report--

System

# cat / etc/redhat-release CentOS release 6.8 (Final)

1. Upgrade gcc-5.4.0

Gcc version of the system before installation

# gcc-vUsing built-in specs.Target: x86_64-redhat-linuxConfigured with:.. / configure-- prefix=/usr-- mandir=/usr/share/man-- infodir=/usr/share/info-- with-bugurl= http://bugzilla.redhat.com/bugzilla-- enable-bootstrap-- enable-shared-- enable-threads=posix-- enable-checking=release-- with-system-zlib-- enable-__cxa_atexit-- disable-libunwind-exceptions-- enable-gnu-unique-object-- enable-languages=c,c++,objc,obj-c++,java Fortran Ada-enable-java-awt=gtk-disable-dssi-with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre-enable-libgcj-multifile-enable-java-maintainer-mode-with-ecj-jar=/usr/share/java/eclipse-ecj.jar-disable-libjava-multilib-with-ppl-with-cloog-with-tune=generic with-arch_32=i686 build=x86_64-redhat-linuxThread model : posixgcc version 4.4.7 20120313 (Red Hat 4.4.7-18) (GCC)

1.1 download installation package

Wget http://mirrors.nju.edu.cn/gnu/gcc/gcc-5.4.0/gcc-5.4.0.tar.gz

The following four files are extracted to gcc-5.4.0, and the soft link is mpfr gmp mpc isl

Http://mirror.hust.edu.cn/gnu/mpfr/mpfr-2.4.2.tar.gz

Http://mirrors.nju.edu.cn/gnu/gmp/gmp-4.3.2.tar.gz

Http://mirrors.nju.edu.cn/gnu/mpc/mpc-1.1.0.tar.gz

Http://gcc.gnu.org/pub/gcc/infrastructure/isl-0.14.tar.bz2

Or execute the following script automatically

. / contrib/download_prerequisites

1.2 compile and install

Cd.. mkdir gcc-build-5.4.0cd gcc-build-5.4.0../gcc-5.4.0/configure-- enable-checking=release-- enable-languages=c,c++-- disable-multilibmake & & make install

Gcc- v at this time, the system gcc will automatically become the gcc-5.4 version

# gcc- vUsing built-in specs.COLLECT_GCC=gccCOLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.4.0/lto-wrapperTarget: x86_64-unknown-linux-gnuConfigured with:.. / gcc-5.4.0/configure-- enable-checking=release-- enable-languages=c,c++-- disable-multilibThread model: posixgcc version 5.4.0 (GCC)

Add the environment variable for the new gcc: export PATH=$PATH:/usr/local/bin

Create a soft link to a new gcc: sudo ln-s / usr/local/bin/gcc / usr/bin/gcc

two。 Upgrade cmake to version 3.10

$cmake-- versioncmake version 2.8.12.2

Due to the upgrade of gcc version, the library file of glibc needs to be updated, otherwise an error will be reported.

Cp / usr/local/lib64/libstdc++.so.6.0.21 / usr/lib64mv libstdc++.so.6 libstdc++.so.6.bakln-s libstdc++.so.6.0.21 libstdc++.so.6

Compile and install cmake-3.10

. / bootstrapgmake & & gmake installyum remove cmakeln-s / usr/local/bin/cmake / usr/bin/cmakeln-s / usr/local/bin/cpack / usr/bin/cpackln-s / usr/local/bin/ctest / usr/bin/ctest

The upgraded version at this time is as follows:

# cmake-versioncmake version 3.10.0-rc4CMake suite maintained and supported by Kitware (kitware.com/cmake).

The more obvious pits are as follows:

After 1.gcc upgrade, the original glibc library will send changes

Glibc installed by yum will have libstdc++.so.6.0.13 under / usr/local/lib64 and soft connect to libstdc++.so.6

If cmake is compiled later, it will report "GLIBCXX_3.4.21' not found" when calling the libstdc++ library. If you do the following, the error will disappear if you link the libstdc++ library file under / usr/local/lib64 to / usr/lib64.

# ln-s / usr/local/lib64/libstdc++.so.6 / usr/lib64/libstdc++.so.6

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.