Is there an easy way to disable exceptions in OpenFHE?

Library Questions
1

I would like to build OpenFHE for compatibility with manylinux_2_28, which does not support exceptions. I can compile with -fnoexceptions and then I get

external/openfhe/src/core/lib/utils/prng/blake2engine.cpp:53:9: error: exception handling disabled, use '-fexceptions' to enable
   53 |         OPENFHE_THROW("PRNG: blake2xb failed");

What is the recommended way to turn off exceptions?

2

We don’t normally do this and there is no mechanism for that, but If you need to disable all exceptions, you can modify src/core/include/utils/exception.h by commenting out most of its content (including some includes), and keeping only two things:

  1. The macro OPENFHE_THROW
  2. The helper function member from OpenFHEException:
    static std::string buildErrorMessage(const std::string& file,
    const std::string& func,
    std::size_t line,
    const std::string& desc) {
    return file + “:l.” + std::to_string(line) + “:” + func + "(): " + desc;
    }

After that, you’ll likely want to make buildErrorMessage() inline and redefine the macro like this:
#define OPENFHE_THROW(desc) { \
std::cerr << buildErrorMessage(_FILE_, _func_, _LINE_, (desc)) << std::endl; \
std::abort(); }

3

Also, keep the compiler option enabled. It may be needed