fix: SLIC3R_PCH=OFF now builds on Windows, allowing compiler caching (#15552)

src/libslic3r/BlacklistedLibraryCheck.cpp

@@ -1,6 +1,7 @@
 #include "BlacklistedLibraryCheck.hpp"
 
 #include <cstdio>
+#include <boost/filesystem/path.hpp>
 #include <boost/nowide/convert.hpp>
 
 #ifdef  WIN32

src/libslic3r/CMakeLists.txt

@@ -665,6 +665,13 @@ if(SLIC3R_PROFILE)
     target_link_libraries(libslic3r PRIVATE Shiny)
 endif()
 
+if (WIN32)
+    # Public, since BlacklistedLibraryCheck.hpp includes windows.h. Empty
+    # WIN32_LEAN_AND_MEAN matches the sources that define it themselves; bare
+    # NOMINMAX matches the one libigl already passes.
+    target_compile_definitions(libslic3r PUBLIC "WIN32_LEAN_AND_MEAN=" "NOMINMAX")
+endif ()
+
 if (SLIC3R_PCH AND NOT SLIC3R_SYNTAXONLY)
     add_precompiled_header(libslic3r pchheader.hpp FORCEINCLUDE)
 endif ()

src/libslic3r/MultiPoint.hpp

@@ -24,6 +24,7 @@ public:
     explicit MultiPoint(const Points &_points) : points(_points) {}
     MultiPoint& operator=(const MultiPoint &other) { points = other.points; return *this; }
     MultiPoint& operator=(MultiPoint &&other) { points = std::move(other.points); return *this; }
+    virtual ~MultiPoint() = default;
     void scale(double factor);
     void scale(double factor_x, double factor_y);
     void translate(double x, double y) { this->translate(Point(coord_t(x), coord_t(y))); }

src/libslic3r/Print.cpp

@@ -1,3 +1,8 @@
+#ifdef _WIN32
+// Keep this first. A header below reaches boost/regex, whose w32_regex_traits
+// needs the Win32 types declared already.
+#include <Windows.h>
+#endif
 #include "Config.hpp"
 #include "Exception.hpp"
 #include "Print.hpp"

src/libslic3r/SLA/Hollowing.cpp

@@ -1,4 +1,5 @@
 #include <functional>
+#include <numeric>
 #include <optional>
 
 #include <libslic3r/OpenVDBUtils.hpp>