👀 Views: 2 💬 Answers: 1 📅 Created: 2025-06-07

gcc templates recursion optimization C++

I've spent hours debugging this and I'm working on a project and hit a roadblock. I'm experiencing an scenario with GCC version 11.3.0 where I have a template class that recursively instantiates itself for a fixed depth, but it results in a stack overflow during compilation, especially when using optimization flags. The code is structured as follows: ```cpp #include <iostream> template<int N> class Recursive { public: void process() { std::cout << "Processing level " << N << std::endl; if constexpr (N > 0) { Recursive<N-1> r; r.process(); } } }; int main() { Recursive<10000> r; r.process(); return 0; } ``` When I compile this code with GCC using the optimization flag `-O2`, I get the following behavior message: ``` In file included from example.cpp:1: example.cpp:5:1: internal compiler behavior: Segmentation fault ``` I've tried reducing the recursion depth to 1000, and it compiles and runs correctly, but I need to handle deeper recursions due to the nature of my application. I've also experimented with different optimization levels (`-O0`, `-O1`, `-Os`) and even disabled inlining with `-fno-inline`, but the question continues at high recursion depths. Is there a known workaround for handling such cases in GCC, or is there a limitation in how deep recursive templates can be optimized? Could switching to a different compiler or version help resolve these stack overflow issues? My development environment is macOS. Thanks in advance! I'm on Linux using the latest version of C++. Is there a simpler solution I'm overlooking? I'm working with C++ in a Docker container on Windows 10.