From bf31940091acff45e2dd71904eccf0c1dd8f7daf Mon Sep 17 00:00:00 2001
From: DwifteJB <dwifte@outlook.com>
Date: Wed, 4 Mar 2026 21:15:46 +0000
Subject: [PATCH] fix: auto-detect winsysroot from msbuild location & replace
 /winsysroot with explicit -imsvc paths

---
 cmake/LinuxCrosscompile.cmake | 40 ++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/cmake/LinuxCrosscompile.cmake b/cmake/LinuxCrosscompile.cmake
index b4017da8b..558dd70c0 100644
--- a/cmake/LinuxCrosscompile.cmake
+++ b/cmake/LinuxCrosscompile.cmake
@@ -7,10 +7,44 @@ set(CMAKE_LINKER lld-link)
 set(CMAKE_C_COMPILER_FRONTEND_VARIANT MSVC)
 set(CMAKE_CXX_COMPILER_FRONTEND_VARIANT MSVC)
 
-add_compile_options(/winsysroot /opt/msvc --target=x86_64-pc-windows-msvc -fms-compatibility -fms-extensions -fdelayed-template-parsing)
-add_link_options(/winsysroot:/opt/msvc)
+# rm: locate winsysroot via the msbuild.exe path
+find_program(_msbuild_exe msbuild)
+if(_msbuild_exe)
+    get_filename_component(_msbuild_bin ${_msbuild_exe} DIRECTORY)   # .../bin/x64
+    get_filename_component(_candidate   "${_msbuild_bin}/.."  ABSOLUTE) # .../bin
+    if(NOT IS_DIRECTORY "${_candidate}/vc")
+        get_filename_component(_candidate "${_candidate}/.." ABSOLUTE)  # .../<root>
+    endif()
+    set(MSVC_WINSYSROOT ${_candidate})
+else()
+    # rm: assume /opt/msvc as a fallback (which is usually the default path)
+    set(MSVC_WINSYSROOT /opt/msvc)
+endif()
 
-#set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> /I /opt/msvc/kits/10/include/10.0.26100.0/shared <DEFINES> /fo<OBJECT> <SOURCE>")
+# rm: detect msvc version
+file(GLOB _msvc_versions LIST_DIRECTORIES true ${MSVC_WINSYSROOT}/VC/Tools/MSVC/*)
+list(GET _msvc_versions 0 _msvc_dir)
+
+# rm: detect window sdk version
+file(GLOB _winsdk_versions LIST_DIRECTORIES true ${MSVC_WINSYSROOT}/kits/10/Include/*)
+list(GET _winsdk_versions 0 _winsdk_dir)
+get_filename_component(_winsdk_ver ${_winsdk_dir} NAME)
+
+add_compile_options(
+    --target=x86_64-pc-windows-msvc
+    -fms-compatibility
+    -fms-extensions
+    -fdelayed-template-parsing
+    # rm: paths to msvc and windows sdk headers
+    "-imsvc${_msvc_dir}/include"
+    "-imsvc${_msvc_dir}/atlmfc/include"
+    "-imsvc${MSVC_WINSYSROOT}/kits/10/Include/${_winsdk_ver}/ucrt"
+    "-imsvc${MSVC_WINSYSROOT}/kits/10/Include/${_winsdk_ver}/um"
+    "-imsvc${MSVC_WINSYSROOT}/kits/10/Include/${_winsdk_ver}/shared"
+    "-imsvc${MSVC_WINSYSROOT}/kits/10/Include/${_winsdk_ver}/winrt"
+)
+
+add_link_options(/winsysroot:${MSVC_WINSYSROOT})
 
 set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
 set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)