GCC73

# GCC 73:
step 1: Download ftp://ftp.gwdg.de/pub/misc/gcc/releases/gcc-7.3.0/ 
step 2: Extract tar zxvf gcc-7.3.0.tar.gz 
setep 3: cd gcc-7.3.0 and ./contrib/download_prerequisites

step 4: On Fedora: dnf install libgcc.i686
        mkdir build and cd build
sudo dnf install texinfo
step 5: ../configure --prefix=/opt/gcc73 
                --program-suffix=73 --enable-languages=c,c++,fortran,go 
                 --disable-multilib --enable-shared --enable-threads=posix 
                 --disable-checking --with-system-zlib --enable-__cxa_atexit 
                 --disable-libunwind-exceptions
step 6: make -j 4\
step 7: make install (sudo) \
step 8: Now create a text file named: gcc73.sh and in it add the following. \

 #!/bin/sh \
GCC73_BIN=/opt/gcc73/bin \
PATH=$GCC34_BIN:$PATH \
export PATH \

step 9: As root, place the file into /etc/profile.d/ and make sure it has execute permissions for all. \

[root@charon ~]# ls -la /etc/profile.d/gcc73.sh \
-rw-r--r--  1 root root 66 Jun 15 21:38 /etc/profile.d/gcc73.sh \

[root@charon ~]# chmod 755 /etc/profile.d/gcc73.sh \

[root@charon ~]# ls -la /etc/profile.d/gcc73.sh \
-rwxr-xr-x  1 root root 66 Jun 15 21:38 /etc/profile.d/gcc73.sh \
step 10: Using New GCC

If you installed as above, running gcc34 or any other app you installed should be directly accessible. You can verify with the following steps: \

[mirandam@charon ~]$ which gcc34 \
/opt/gcc34/bin/gcc34 \
[mirandam@charon ~]$ which g++34 \
/opt/gcc34/bin/g++34 \

[mirandam@charon ~]$ gcc34 -v \
Reading specs from /opt/gcc34/lib/gcc/i686-pc-linux-gnu/7.3.0/specs \
Configured with: /home/mirandam/gcc/gcc-7.3.0/configure 

step 11: Environment Variables
Most softwares support the CC and CXX environment variables. First assign them, then run configure and/or make. Example:

# export CC=gcc73
# export CXX=g++73
# ./configure



# some errors related to LIBRARY_PATH:
command: env | grep '^LIBRARY_PATH='
deactive this PATH