vcpkg/ports/gmsh/fix-install.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2e65c4f..50bea50 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1947,13 +1947,37 @@ endif()
 
 # mark targets as optional so we can install them separately if needed
 # (e.g. "make lib" or "make shared" followed by "make install/fast")
-install(TARGETS gmsh DESTINATION ${GMSH_BIN} OPTIONAL)
+install(
+  TARGETS gmsh
+  RUNTIME DESTINATION bin
+  OPTIONAL
+)
 if(ENABLE_BUILD_LIB)
-  install(TARGETS lib DESTINATION ${GMSH_LIB} OPTIONAL)
+  install(
+    TARGETS lib
+    EXPORT unofficial-gmsh-config
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib
+    OPTIONAL
+  )
+  TARGET_INCLUDE_DIRECTORIES(lib PUBLIC $<INSTALL_INTERFACE:include>)
 endif()
 if(ENABLE_BUILD_SHARED OR ENABLE_BUILD_DYNAMIC)
-  install(TARGETS shared DESTINATION ${GMSH_LIB} OPTIONAL)
-endif()
+  install(
+    TARGETS shared
+    EXPORT unofficial-gmsh-config
+    RUNTIME DESTINATION bin
+    LIBRARY DESTINATION lib
+    ARCHIVE DESTINATION lib
+    OPTIONAL
+  )
+  TARGET_INCLUDE_DIRECTORIES(shared PUBLIC $<INSTALL_INTERFACE:include>)
+endif()
+install(
+  EXPORT unofficial-gmsh-config
+  NAMESPACE unofficial::gmsh:: 
+  DESTINATION share/unofficial-gmsh
+)
 
 if(ENABLE_ONELAB AND EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/contrib/onelab)
   install(FILES ${ONELAB_PY} DESTINATION ${GMSH_BIN})