super-slicer: fix build with GCC 14 (#362194)

pkgs/applications/misc/prusa-slicer/default.nix

@@ -91,7 +91,8 @@ stdenv.mkDerivation (finalAttrs: {
   };
 
   # required for GCC 14
-  postPatch = ''
+  # (not applicable to super-slicer fork)
+  postPatch = lib.optionalString (finalAttrs.pname == "prusa-slicer") ''
     substituteInPlace src/libslic3r/Arrange/Core/DataStoreTraits.hpp \
       --replace-fail \
       "WritableDataStoreTraits<ArrItem>::template set" \

pkgs/applications/misc/prusa-slicer/super-slicer.nix

@@ -16,7 +16,6 @@ let
       ];
       hash = "sha256-v0q2MhySayij7+qBTE5q01IOq/DyUcWnjpbzB/AV34c=";
     })
-    ./meshboolean-const.patch
     # Drop if this fix gets merged upstream
     (fetchpatch {
       url = "https://github.com/supermerill/SuperSlicer/commit/fa7c545efa5d1880cf24af32083094fc872d3692.patch";
@@ -55,13 +54,18 @@ let
 
     # - wxScintilla is not used on macOS
     # - Partially applied upstream changes cause a bug when trying to link against a nonexistent libexpat
-    prePatch = super.prePatch + ''
+    postPatch = super.postPatch + ''
       substituteInPlace src/CMakeLists.txt \
         --replace "scintilla" "" \
         --replace "list(APPEND wxWidgets_LIBRARIES libexpat)" "list(APPEND wxWidgets_LIBRARIES EXPAT::EXPAT)"
 
       substituteInPlace src/libslic3r/CMakeLists.txt \
         --replace "libexpat" "EXPAT::EXPAT"
+
+      # fixes GCC 14 error
+      substituteInPlace src/libslic3r/MeshBoolean.cpp \
+        --replace-fail 'auto &face' 'auto face' \
+        --replace-fail 'auto &vi' 'auto vi'
     '';
 
     # We don't need PS overrides anymore, and gcode-viewer is embedded in the binary.