CentOS 7 has supported GCC compilation of 32-bit programs

By looking at the CentOS update package, we found that the GCC 32-bit version was already supported.

In fact, using the Centos-7.0-1406-x86_64-everything.iso Complete installation file, the configuration within the Centos-media.repo is
[C7-media]
name=centos-$releasever-media
baseurl=file:///mnt/cdrom/
Gpgcheck=1
Enabled=1
Gpgkey=file:///mnt/cdrom/rpm-gpg-key-centos-7

Full installation
Yum--disablerepo=\*--enablerepo=c7-media Install Glibc-devel

http://mirrors.hustunique.com/centos/7.0.1406/updates/x86_64/Packages/

The corresponding files are:

libstdc++-4.8.2-16.2.el7_0.i686.rpm 18-aug-2014 21:35 301K

libgcc-4.8.2-16.2.el7_0.i686.rpm 18-aug-2014 21:34 94K

Use the command to view the two packages and find the files we need.

# RPM-QPL libgcc-4.8.2-16.2.el7_0.i686.rpm

Warning:libgcc-4.8.2-16.2.el7_0.i686.rpm:header V3 rsa/sha256 Signature, key ID F4a80eb5:nokey

/lib/libgcc_s-4.8.2-20140120.so.1

/lib/libgcc_s.so.1

/usr/share/doc/libgcc-4.8.2

/usr/share/doc/libgcc-4.8.2/copying

/usr/share/doc/libgcc-4.8.2/copying. Lib

/usr/share/doc/libgcc-4.8.2/copying. RUNTIME

/usr/share/doc/libgcc-4.8.2/copying3

/usr/share/doc/libgcc-4.8.2/copying3. Lib

# RPM-QPL libstdc++-4.8.2-16.2.el7_0.i686.rpm

Warning:libstdc++-4.8.2-16.2.el7_0.i686.rpm:header V3 rsa/sha256 Signature, key ID F4a80eb5:nokey

/usr/lib/libstdc++.so.6

/usr/lib/libstdc++.so.6.0.19

/usr/share/gcc-4.8.2

/usr/share/gcc-4.8.2/python

/usr/share/gcc-4.8.2/python/libstdcxx

/usr/share/gcc-4.8.2/python/libstdcxx/__init__.py

/usr/share/gcc-4.8.2/python/libstdcxx/__init__.pyc

/usr/share/gcc-4.8.2/python/libstdcxx/__init__.pyo

/usr/share/gcc-4.8.2/python/libstdcxx/v6

/usr/share/gcc-4.8.2/python/libstdcxx/v6/__init__.py

/usr/share/gcc-4.8.2/python/libstdcxx/v6/__init__.pyc

/usr/share/gcc-4.8.2/python/libstdcxx/v6/__init__.pyo

/usr/share/gcc-4.8.2/python/libstdcxx/v6/printers.py

/usr/share/gcc-4.8.2/python/libstdcxx/v6/printers.pyc

/usr/share/gcc-4.8.2/python/libstdcxx/v6/printers.pyo

/usr/share/gdb

/usr/share/gdb/auto-load

/usr/share/gdb/auto-load/usr

/usr/share/gdb/auto-load/usr/lib

/usr/share/gdb/auto-load/usr/lib/libstdc++.so.6.0.19-gdb.py

/usr/share/gdb/auto-load/usr/lib/libstdc++.so.6.0.19-gdb.pyc

/usr/share/gdb/auto-load/usr/lib/libstdc++.so.6.0.19-gdb.pyo