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###############################################################################
# Check for the presence of std::exception_ptr and std::rethrow
macro(NMZ_CHECK_FOR_EXCEPTION_PTR)
# We need to check whether the compiler supports the rethrowing mechanism
include(CheckCXXSourceRuns)
# at least the c++11 flag needs to be set
set(CMAKE_REQUIRED_FLAGS "${CMAKE_CXX_FLAGS}")
check_cxx_source_runs("
#include <iostream>
#include <exception>
#include <stdexcept>
int main () {
std::exception_ptr tmp_exception;
try {
throw std::overflow_error(\"some overflow exception\");
} catch(const std::exception& e) {
tmp_exception = std::current_exception();
std::cout << \"exception caught, but continuing...\" << std::endl;
}
std::cout << \"(after exception)\" << std::endl;
try {
if (tmp_exception != std::exception_ptr()) std::rethrow_exception(tmp_exception);
} catch (const std::exception& e) {
std::cout << \"exception caught again \" << e.what() << std::endl;
}
return 0;
}
"
HAVE_EXCEPTION_PTR)
endmacro(NMZ_CHECK_FOR_EXCEPTION_PTR)
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