1. install cygwin
https://www.cygwin.com/
2.copy the setup.exe under cygwin64 folder and run
C:\cygwin64>setup-x86_64.exe -q -P wget -P gcc-g++ -P make -P diffutils -P libmpfr-devel -P libgmp-devel -P libmpc-devel
3.
wget http://ftpmirror.gnu.org/gcc/gcc-4.9.2/gcc-4.9.2.tar.gz
4.
tar xf gcc-4.9.2.tar.gz
5.
mkdir build-gcc
cd build-gcc
../gcc-4.9.2/configure --program-suffix=-4.9.2 --enable-languages=c,c++ --disable-bootstrap --disable-shared
6.
make -j4
7.
make install
cd ..8. test.cpp
#include <iostream>
int main()
{
auto lambda = [](auto x){ return x; };
std::cout << lambda("Hello generic lambda!\n");
return 0;
}
9.
g++ --version
g++ -std=c++1y test.cpp
g++-4.9.2 -std=c++14 test.cpp
./a.exe
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