1 files changed, 74 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_filesystem.hh b/source/blender/blenlib/BLI_filesystem.hh
new file mode 100644
index 00000000000..9d56d6459b0
--- /dev/null
+++ b/source/blender/blenlib/BLI_filesystem.hh
@@ -0,0 +1,74 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/** \file
+ * \ingroup bli
+ *
+ * Header for a platform compatible replacement of C++17's `std::filesystem`. Access via
+ * `blender::filesystem`.
+ *
+ * The need for this comes from macOS only supporting `std::filesystem` with XCode 11, only
+ * available on macOS 10.15.
+ */
+
+#pragma once
+
+/* ghc::filesystem includes Windows.h, which by default pollutes the global namespace and impacts
+ * compile time quite a bit. Set some defines to avoid this. */
+#ifdef WIN32
+#  ifndef NOGDI
+#    define NOGDI
+#    define NOGDI_CLEANUP
+#  endif
+#  ifndef NOMINMAX
+#    define NOMINMAX
+#    define NOMINMAX_CLEANUP
+#  endif
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN_CLEANUP
+#  endif
+#  ifndef NOCOMM
+#    define NOCOMM
+#    define NOCOMM_CLEANUP
+#  endif
+#endif /* _WIN32 */
+
+/* Header for ghc::filesystem. */
+#include "filesystem.hpp"
+
+#ifdef WIN32
+#  ifdef NOGDI_CLEANUP
+#    undef NOGDI
+#    undef NOGDI_CLEANUP
+#  endif
+#  ifdef NOMINMAX_CLEANUP
+#    undef NOMINMAX
+#    undef NOMINMAX_CLEANUP
+#  endif
+#  ifdef WIN32_LEAN_AND_MEAN_CLEANUP
+#    undef WIN32_LEAN_AND_MEAN
+#    undef WIN32_LEAN_AND_MEAN_CLEANUP
+#  endif
+#  ifdef NOCOMM_CLEANUP
+#    undef NOCOMM
+#    undef NOCOMM_CLEANUP
+#  endif
+#endif
+
+namespace blender {
+namespace filesystem = ghc::filesystem;
+}