Cannot build GDB arc-2019.09-rc1 in CentOS 6.x

[abrodkin]

On configuration of host GDB in CentOS 6.x the following error message appears:

checking whether g++ supports C++11 features with -std=c++11... no
checking whether g++ supports C++11 features with +std=c++11... no
checking whether g++ supports C++11 features with -h std=c++11... no
checking whether g++ supports C++11 features with -std=c++0x... no
checking whether g++ supports C++11 features with +std=c++0x... no
make[4]: Leaving directory `/arc_gnu/bd-elf32/gdb/gprof'
make[3]: Leaving directory `/arc_gnu/bd-elf32/gdb/gprof'
make[2]: Leaving directory `/arc_gnu/bd-elf32/gdb/gprof'
checking whether g++ supports C++11 features with -h std=c++0x... no
configure: error: *** A compiler with support for C++11 language features is required.

That happens because in CentOS 6.x default GCC is 4.4.7 and it indeed doesn't support C++11:

# 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-boot
strap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-u
nique-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-cloo
g --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)

[abrodkin]

Vanilla CentOS 6.x is not suitable for building up-to-date GDB as it requires compiler with C++11 support (see https://sourceware.org/gdb/current/onlinedocs/gdb/Requirements.html) and default GCC from CentOS 6.x (4.4.7) doesn't support it yet.

That might be worked-around with use of RedHat's so-called "software collections" (SCL), see https://access.redhat.com/documentation/en-us/red_hat_developer_toolset.

[abrodkin]

We don't support CentOS 6.x hosts starting from arc-2019.09 release.