Check of minimal support compiler version for CMake itself

I tried to compile CMake-3.22.1 with gcc/4.4 with the following command:

cmake3 -H. -Bobjdir -DCMAKE_INSTALL_PREFIX=/opt/cmake/3.22.1

Configuration was successful.

Then, when compiling of Source/kwsys/CMakeFiles/cmsys.dir/Directory.cxx.o was, the compilation was failed with the following output:

In file included from /home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Directory.hxx:7,
                 from /home/ger/build/cmake-3.22.1/Source/kwsys/Directory.cxx:4:
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx:61: error: only declarations of constructors can be ‘explicit’
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx:91: error: ISO C++ forbids initialization of member ‘Kind_’
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx:91: error: making ‘Kind_’ static
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx:91: error: ISO C++ forbids in-class initialization of non-const static member ‘Kind_’
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx: In constructor ‘cmsys::Status::Status(cmsys::Status::Kind)’:
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Status.hxx:87: error: ‘cmsys::Status::Kind cmsys::Status::Kind_’ is a static data member; it can only be initialized at its definition
In file included from /home/ger/build/cmake-3.22.1/Source/kwsys/Directory.cxx:4:
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Directory.hxx: At global scope:
/home/ger/build/cmake-3.22.1/objdir/Source/cmsys/Directory.hxx:38: error: ‘nullptr’ was not declared in this scope

I removed repeated errors.

The compilation command was:

/usr/bin/c++   -DKWSYS_NAMESPACE=cmsys -I/home/ger/build/cmake-3.22.1/objdir/Source -I/home/ger/build/cmake-3.22.1/objdir/Source/kwsys  -std=gnu++0x -o CMakeFiles/cmsys.dir/Directory.cxx.o -c /home/ger/build/cmake-3.22.1/Source/kwsys/Directory.cxx

GCC version:

$ gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured 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-linux
Thread model: posix
gcc version 4.4.7 20120313 (Red Hat 4.4.7-23) (GCC) 

Could someone, please, add checking of the minimal support compiler version?