Make DCPoMatic compatible with ICU >= 75

ICU >= 75 uses c++17 features and therefore requires compilation with
-std=c++17. However, this causes some namespace issues in
src/wx/file_picker_ctrl.cc and
src/wx/film_name_location_dialog.cc
between boost::optional, boost::filesystem and the corresponding
names from the std lib.

The patch fixes this namespace issues and adds a version check in
wscript to enable compilation with c++17, if icu >= 75 is detected.

3 files changed, 16 insertions, 10 deletions

diff --git a/src/wx/file_picker_ctrl.cc b/src/wx/file_picker_ctrl.cc
index 7aa0bfb40..82978dad6 100644
--- a/src/wx/file_picker_ctrl.cc
+++ b/src/wx/file_picker_ctrl.cc
@@ -43,8 +43,8 @@ FilePickerCtrl::FilePickerCtrl(
 	bool open,
 	bool warn_overwrite,
 	std::string initial_path_key,
-	optional<std::string> initial_filename,
-	optional<filesystem::path> override_path
+	boost::optional<std::string> initial_filename,
+	boost::optional<boost::filesystem::path> override_path
 	)
 	: wxPanel (parent)
 	, _prompt (prompt)
@@ -72,7 +72,7 @@ FilePickerCtrl::FilePickerCtrl(
 
 
 void
-FilePickerCtrl::set_filename(optional<string> filename)
+FilePickerCtrl::set_filename(boost::optional<string> filename)
 {
 	if (filename) {
 		_file->SetLabel(std_to_wx(*filename));
@@ -83,7 +83,7 @@ FilePickerCtrl::set_filename(optional<string> filename)
 
 
 void
-FilePickerCtrl::set_path(optional<boost::filesystem::path> path)
+FilePickerCtrl::set_path(boost::optional<boost::filesystem::path> path)
 {
 	_path = path;
 
diff --git a/src/wx/film_name_location_dialog.cc b/src/wx/film_name_location_dialog.cc
index 05ffa7a68..6c54f1848 100644
--- a/src/wx/film_name_location_dialog.cc
+++ b/src/wx/film_name_location_dialog.cc
@@ -39,7 +39,7 @@ using namespace std;
 using namespace boost;
 
 
-optional<filesystem::path> FilmNameLocationDialog::_directory;
+boost::optional<boost::filesystem::path> FilmNameLocationDialog::_directory;
 
 
 FilmNameLocationDialog::FilmNameLocationDialog (wxWindow* parent, wxString title, bool offer_templates)
@@ -112,17 +112,17 @@ FilmNameLocationDialog::folder_changed ()
 }
 
 
-filesystem::path
+boost::filesystem::path
 FilmNameLocationDialog::path () const
 {
-	filesystem::path p;
+	boost::filesystem::path p;
 	p /= wx_to_std (_folder->GetPath());
 	p /= wx_to_std (_name->GetValue());
 	return p;
 }
 
 
-optional<string>
+boost::optional<string>
 FilmNameLocationDialog::template_name () const
 {
 	if (!_use_template->GetValue() || _template_name->GetSelection() == -1) {
@@ -139,7 +139,7 @@ FilmNameLocationDialog::template_name () const
 bool
 FilmNameLocationDialog::check_path ()
 {
-	if (filesystem::is_directory(path()) && !filesystem::is_empty(path())) {
+	if (boost::filesystem::is_directory(path()) && !boost::filesystem::is_empty(path())) {
 		if (!confirm_dialog (
 			    this,
 			    std_to_wx (
@@ -150,7 +150,7 @@ FilmNameLocationDialog::check_path ()
 			    )) {
 			return false;
 		}
-	} else if (filesystem::is_regular_file(path())) {
+	} else if (boost::filesystem::is_regular_file(path())) {
 		error_dialog (
 			this,
 			String::compose (wx_to_std(_("%1 already exists as a file, so you cannot use it for a film.")), path().c_str())
diff --git a/wscript b/wscript
index 5aeb4f1c3..744e45416 100644
--- a/wscript
+++ b/wscript
@@ -252,6 +252,12 @@ def configure(conf):
                        lib=['icuio', 'icui18n', 'icudata', 'icuuc'],
                        uselib_store='ICU')
 
+    # If ICU version > 75 we need stdc++17, otherwise we stick with stdc++11
+    if (conf.check_cfg(modversion='icu-i18n') >= '75'):
+        conf.env.append_value('CXXFLAGS', '-std=c++17')
+    else:
+        conf.env.append_value('CXXFLAGS', '-std=c++11')
+
     # libsamplerate
     conf.check_cfg(package='samplerate', args='--cflags --libs', uselib_store='SAMPLERATE', mandatory=True)