Back out "fbcode/mapillary/opensfm/opensfm/src"

Summary:
Original commit changeset: f646c9390378

Original Phabricator Diff: D63971477

Reviewed By: bal-a

Differential Revision: D72844843

fbshipit-source-id: 857420c62e42d43f2ec85f0c2ae22d72de79f223

Author: Pau Gargallo

opensfm/src/debug_c_extension.cc

@@ -0,0 +1,29 @@
+// Tool to debug c extensions with a c debugger.
+//
+// How to use it:
+//
+//   1. Write a module in python that calls the extension you want to debug.
+//      Make sure the extension code is called at import time.
+//
+//   2. Build opensfm/cmake_build in Debug mode.
+//
+//   3. Tell the debugger to run
+//
+//        ./debug_c_extension module
+//
+//      where module is the name of the module that you wrote.
+
+#include <pybind11/embed.h>
+
+#include <iostream>
+namespace py = pybind11;
+
+int main(int argc, char *argv[]) {
+  py::scoped_interpreter guard{};
+
+  if (argc != 2) {
+    std::cout << "Usage: " << argv[0] << " module" << std::endl;
+  } else {
+    py::module sys = py::module::import(argv[1]);
+  }
+}

opensfm/src/testing_main.cc

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+#include <gflags/gflags.h>
+#include <glog/logging.h>
+#include <gtest/gtest.h>
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  google::ParseCommandLineFlags(&argc, &argv, true);
+  google::InitGoogleLogging(argv[0]);
+
+  return RUN_ALL_TESTS();
+}