extract_seq_from_fasta not getting installed

[Troyee Das]

Hello,

When I am manually trying to install

g++ -O3 -o bin/extract_seq_from_fasta ../src/extract_seq_from_fasta.c++

I am getting this error:

In file included from /usr/include/c++/4.8.2/unordered_set:35:0,
from ../src/extract_seq_from_fasta.c++:19:
/usr/include/c++/4.8.2/bits/c++0x_warning.h:32:2: error: #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
#error This file requires compiler and library support for the
^
../src/extract_seq_from_fasta.c++: In function ‘int main(int, char**)’:
../src/extract_seq_from_fasta.c++:41:3: error: ‘unordered_set’ was not declared in this scope
unordered_set ids_to_keep;
^
../src/extract_seq_from_fasta.c++:41:23: error: expected primary-expression before ‘>’ token
unordered_set ids_to_keep;
^
../src/extract_seq_from_fasta.c++:41:25: error: ‘ids_to_keep’ was not declared in this scope
unordered_set ids_to_keep;
^

My g++ version is
g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44)

Please suggest how to resolve this.