compat.expat

// compat.expat — behavioral test. It parses a document rather than checking
// that symbols resolve, because the interesting failures are configuration
// ones: XML_DTD, XML_GE and XML_NS are feature switches compiled into
// expat_config.h, and getting them wrong yields a parser that links perfectly
// and then rejects (or mis-splits) input.

#ifdef __linux__

#include <expat.h>

#include <dlfcn.h>
#include <cstdio>
#include <cstring>
#include <string>
#include <vector>

namespace {

int failures = 0;

void check(bool ok, const char *what)
{
// …