[QUOTE
Unpack mpfr-3.1.3.tar.xz, gmp-6.1.0.tar.xz, mpc-1.0.3.tar.gz into gcc-5.3.0/.
Rename to have gcc-5.3.0/{ mpfr/, gmp/, mpc/ }.[/QUOTE]

What is this rename ? I dont understand it

Re #16 : Renaming, use the 'mv' command → →

cd gcc-5.3/
tar xvf mpfr-3.1.3.tar.xz
mv mpfr-3.1.3/ mpfr
tar xvf gmp-6.1.0.tar.xz
mv gmp-6.1.0/ gmp
tar xvf mpc-1.0.3.tar.gz
mv mpc-1.0.3/ mpc


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Don't I need to install them separately?

And all these files must be with in gcc-5.3.0 ?

All files are unzipped and they are separately installed into gcc-5.3.0. They are renamed as mentioned earlier.

The following commands are used

mkdir build-gcc
cd build-gcc
../gcc-5.3.0/configure --prefix=/opt/gcc-5.3.0 --enable-languages=c,c++ --with-gmp=/opt/gmp-6.1.0 --with-mpfr=/opt/mpfr-3.1.5 --with-mpc=/opt/mpc-1.0.3 --disable-multilib

i get the following error

make[3]: *** No rule to make target `../build-x86_64-unknown-linux-gnu/libiberty/libiberty.a', needed by `build/genmddeps'. Stop.
make[3]: Leaving directory `/opt/src/gcc-5.3.0/build-gcc/host-x86_64-unknown-linux-gnu/gcc'
make[2]: *** [all-stage1-gcc] Error 2
make[2]: Leaving directory `/opt/src/gcc-5.3.0/build-gcc'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/opt/src/gcc-5.3.0/build-gcc'
make: *** [all] Error 2

Re #18.
No. Would require a system path.
And later versions of gmp, mpfr will conflict with the system versions.

The required objects from gmp, mpfr, mpc are built into gcc-5.3 .
Which means : when installed, no external gmp, mpfr, mpc is required.

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Re #19.

Wrong configure line. Do as post #2, please. Else you will fail.

Do not do this.


? Are you sure all the prerequisites are installed ?
# yum install bison findutils binutils-devel coreutils bzip2-devel zlib-devel
.... and a proper gcc/g++-compiler, 4.7 or later.

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i first extracted gcc 5.3.0

then the other three files in the same folder and renamed.

Now the folder gcc 5.3.0 have following files

[root@mqml gcc-5.3.0]# ls
ABOUT-NLS fixincludes libgo ltversion.m4
boehm-gc gcc libgomp MAINTAINERS
buil-gcc gmp libiberty maintainer-scripts
ChangeLog gmp-6.1.0.tar.bz2 libitm Makefile.def
ChangeLog.jit gnattools libjava Makefile.in
ChangeLog.tree-ssa gotools libmpx Makefile.tpl
compile include libobjc MD5SUMS
config INSTALL liboffloadmic missing
config.guess install-sh libquadmath mkdep
config-ml.in intl libsanitizer mkinstalldirs
config.rpath LAST_UPDATED libssp move-if-change
config.sub libada libstdc++-v3 mpc
configure libatomic libtool-ldflags mpc-1.0.3.tar.gz
configure.ac libbacktrace libtool.m4 mpfr
contrib libcc1 libvtv mpfr-3.1.5.tar.bz2
COPYING libcilkrts ltgcc.m4 NEWS
COPYING3 libcpp ltmain.sh README
COPYING3.LIB libdecnumber lt~obsolete.m4 symlink-tree
COPYING.LIB libffi lto-plugin ylwrap
COPYING.RUNTIME libgcc ltoptions.m4 zlib
depcomp libgfortran ltsugar.m4

[root@mqml gcc-5.3.0]#

#mkdir buil-gcc
#cd buil-gcc
# ../gcc-5.3.0/configure --prefix=/usr/local/gcc53 --program-suffix=53 --enable-languages=c,c++ --with-system-zlib --disable-multilib


I get the following error


bash: ../gcc-5.3.0/configure: No such file or directory

Re #22

build-gcc/ : Must be outside the gcc-5.3/ folder. See post #2.
No work can be done inside gcc-5.3/.

If you are using e.g. /opt/, it is /opt/{ gcc-5.3/, build-gcc/ }


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I have finished with configure, make and make install.

What is the next procedure? IS it all?

Re #24.

After make 'install' : ( Already answered. Post #15 )
cd /usr/bin/
ln -s /usr/local/gcc53/bin/gcc53
ln -s /usr/local/gcc53/bin/g++53

Using gcc53, examples :
1. export CC=gcc53 CXX=g++53 && ./configure && make
2. (cmake) : CC=gcc53 CXX=g++53 cmake ../


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root@mqml built-gcc]# cd /usr/bin/

[root@mqml bin]# ln -s /usr/local/gcc53/bin/gcc53

ln: creating symbolic link `./gcc53': File exists

[root@mqml bin]# ln -s /usr/local/gcc53/bin/g++53

ln: creating symbolic link `./g++53': File exists

[root@mqml bin]#


What's next?

[B]What is this?
[B]

Re #27.

Using : Examples how to use gcc53 and g++53 when compiling an application.

I assume there was a purpose to build a new compiler.

I want to install GROMACS 2016.1.

I use the following commands

tar xfz gromacs-5.1.tar.gz
cd gromacs-5.1
mkdir build
cd build
cmake .. -DGMX_BUILD_OWN_FFTW=ON -DREGRESSIONTEST_DOWNLOAD=ON

For the command i get an error.
Gromacs 2016.1 requires compiler C++ 11 or higher version.


make
make check
sudo make install
source /usr/local/gromacs/bin/GMXRC

Re #29.

The cmake configuration command for gromacs-2016.x is : ( see post #25 )

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