3 files changed, 36 insertions, 12 deletions

diff --git a/migration/migration.cpp b/migration/migration.cpp
index 4ddb2c8c..f4b1739b 100644
--- a/migration/migration.cpp
+++ b/migration/migration.cpp
@@ -26,14 +26,25 @@ using namespace options::globals;
 
 namespace migrations::detail {
 
-static std::vector<mptr> migration_list;
-static std::vector<mfun> migration_thunks;
+
+std::vector<mptr>& migrator::migration_list()
+{
+    static std::vector<mptr> v;
+    return v;
+}
+
+std::vector<mfun>& migrator::migration_thunks()
+{
+    static std::vector<mfun> v;
+    return v;
+}
+
 
 void migrator::register_migration(mptr const& m)
 {
     const QString date = m->unique_date();
 
-    for (mptr const& m2 : migration_list)
+    for (mptr const& m2 : migration_list())
         if (m2->unique_date() == date)
             std::abort();
 
@@ -65,35 +76,35 @@ void migrator::register_migration(mptr const& m)
     if (day_ < 1 || day_ > 31)
         abort();
 
-    migration_list.push_back(m);
+    migration_list().push_back(m);
 }
 
 void migrator::eval_thunks()
 {
-    for (auto& fun : migration_thunks)
+    for (auto& fun : migration_thunks())
     {
         mptr m = fun();
         register_migration(m);
     }
-    if (!migration_thunks.empty())
+    if (!migration_thunks().empty())
         sort_migrations();
-    migration_thunks.clear();
+    migration_thunks().clear();
 }
 
 void migrator::add_migration_thunk(mfun& thunk)
 {
-    migration_thunks.push_back(thunk);
+    migration_thunks().push_back(thunk);
 }
 
 std::vector<mptr>& migrator::migrations()
 {
     eval_thunks();
-    return migration_list;
+    return migration_list();
 }
 
 void migrator::sort_migrations()
 {
-    std::sort(migration_list.begin(), migration_list.end(),
+    std::sort(migration_list().begin(), migration_list().end(),
               [](const mptr x, const mptr y) {
         return x->unique_date() < y->unique_date();
     });
diff --git a/migration/migration.hpp b/migration/migration.hpp
index a3035247..7fc18c97 100644
--- a/migration/migration.hpp
+++ b/migration/migration.hpp
@@ -43,6 +43,9 @@ namespace detail {
 
         static void set_last_migration_time(const QString& val);
         static int to_int(const QString& str, bool& ok);
+
+        static std::vector<mptr>& migration_list();
+        static std::vector<mfun>& migration_thunks();
     };
 
     template<typename t>
diff --git a/video/camera.cpp b/video/camera.cpp
index 42320402..a66d8a59 100644
--- a/video/camera.cpp
+++ b/video/camera.cpp
@@ -4,8 +4,12 @@
 #include <utility>
 #include <QMutex>
 
-static std::vector<std::unique_ptr<video::impl::camera_>> metadata;
-static QMutex mtx;
+std::pair<std::vector<std::unique_ptr<video::impl::camera_>>&, QMutex&> get_metadata()
+{
+    static std::vector<std::unique_ptr<video::impl::camera_>> metadata;
+    static QMutex mtx;
+    return { metadata, mtx };
+}
 
 namespace video::impl {
 
@@ -17,6 +21,7 @@ camera::~camera() = default;
 
 void register_camera(std::unique_ptr<impl::camera_> camera)
 {
+    auto [metadata, mtx] = get_metadata();
     QMutexLocker l(&mtx);
     metadata.push_back(std::move(camera));
 }
@@ -27,6 +32,7 @@ namespace video {
 
 bool show_dialog(const QString& camera_name)
 {
+    auto [metadata, mtx] = get_metadata();
     QMutexLocker l(&mtx);
 
     for (auto& camera : metadata)
@@ -39,6 +45,7 @@ bool show_dialog(const QString& camera_name)
 
 std::unique_ptr<camera_impl> make_camera_(const QString& name)
 {
+    auto [metadata, mtx] = get_metadata();
     QMutexLocker l(&mtx);
 
     for (auto& camera : metadata)
@@ -54,6 +61,7 @@ std::unique_ptr<camera_impl> make_camera(const QString& name)
     if (auto ret = make_camera_(name))
         return ret;
 
+    auto [metadata, mtx] = get_metadata();
     for (auto& camera : metadata)
         for (const QString& name_ : camera->camera_names())
             if (auto ret = camera->make_camera(name_))
@@ -64,6 +72,8 @@ std::unique_ptr<camera_impl> make_camera(const QString& name)
 
 std::vector<QString> camera_names()
 {
+    auto [metadata, mtx] = get_metadata();
+
     QMutexLocker l(&mtx);
     std::vector<QString> names; names.reserve(32);