Build GCC 4.9.2 for C/C++ on CentOS 7

gistfile1.txt

sudo yum install libmpc-devel mpfr-devel gmp-devel

cd ~/Downloads
curl ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-4.9.2/gcc-4.9.2.tar.bz2 -O
tar xvfj gcc-4.9.2.tar.bz2

cd gcc-4.9.2
./configure --disable-multilib --enable-languages=c,c++
make -j 4
make install

This is a bit silly, why not just --j. At least then no matter what hardware you have, make will use it to its capacity. unless doing other jobs, but this is a big job and will take hours with 4cpu.

[root@Talesofmidigard gcc-4.9.2]# make -j 4
make: *** No targets specified and no makefile found. Stop.
[root@Talesofmidigard gcc-4.9.2]#

So I managed to install this successfully, and was compiling code fine, but to make the compiled code run, I had to add "/usr/local/lib64/" to the ls.so.conf. Everything was perfect! But then after a reboot gcc reverted back to version 4.8.5 again... Even after recompiling and reinstalling I cannot get 4.9.2 to work anymore. Any ideas?

For Red Hat and Fedora based systems, run the following command:

[[email protected]] # sudo yum install gmp gmp-devel mpfr mpfr-devel libmpc libmpc-devel

This will install the GNU multiple-precision (MP) libraries for integer, floating point, and complex numbers.

./configure command still complains:

checking whether /usr/local/bin/g++ supports C++14 features with -std=gnu++14... no
checking whether /usr/local/bin/g++ supports C++14 features with -std=gnu++1y... no
configure: error: *** A compiler with support for C++14 language features is required.```
I tried the above recommendations and can't get past this.

thanks a lot

Thanks. Save my day

But -j 4?... took hours for just 4 cpu.
I used --j instead like @JBandassociate indicated

Thanks!

It takes infinity to build and install 😮

ftp 404
->
curl https://ftp.gnu.org/gnu/gcc/gcc-4.9.2/gcc-4.9.2.tar.bz2 -O

Life saver!

Works on Red Hat Enterprise Linux Server release 7.3 (Maipo).

@claud-kim: http://www.linuxfromscratch.org/blfs/view/7.7/general/gcc.html

ok, I can got it working, so how I can upgrade the cc compiler, because see below my console:

gcc --version

gcc (GCC) 4.9.2
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

cc --version

cc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

thanks

I have the same problem for 5.2.0 on CentOS 7.6; after make install, gcc shows the new version but g++ shows 4.8.5!

Thanks,
Ajit

check current path of gcc with which gcc, and then update symlink to your desired gcc path.

Thanks, but I didn't understand the instruction. My gcc already is the new one, it's the g++ that's the problem.

Looks like there was some problem with my original gcc, 4.8.5. I installed devtools-3 and rebuilt 5.2.0 with 4.9.2 from there. Now both gcc and g++ are the new version, 5.2.0.

Sorry about the noise, but thought this may help someone later, though I don't know exactly what the problem was in the first place.

Thanks, but I didn't understand the instruction. My gcc already is the new one, it's the g++ that's the problem.

My bad.

What I meant was to check the different versions of g++/gcc that you have and create a symbolic link to the desired g++/gcc.

So how to uninstall gcc built by this method? Thank you

Душевно

Hi
maybe you need to run :
./contrib/download_prerequisites
before running "./configure ... " command

I used make -j$(nproc) and it went much faster too.

The command sequence below worked on my computer to update to version 7:
sudo yum -y install centos-release-scl
sudo yum -y install devtoolset-7
scl enable devtoolset-7 bash
gcc --version

The command sequence below worked on my computer to update to version 7: sudo yum -y install centos-release-scl sudo yum -y install devtoolset-7 scl enable devtoolset-7 bash gcc --version

this actually fixed an issue i had with node-canvas

npx node-pre-gyp rebuild -C ./node_modules/canvas

gcc version 4.8.5 was not working

Tremendous！