Ensure generated uninstall script is always executable

Author: eramongodb

generate_uninstall/CMakeLists.txt

@@ -47,7 +47,7 @@ if (WIN32)
    install (FILES "${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}" DESTINATION "${UNINSTALL_PROG_DIR}" PERMISSIONS ${UNINSTALL_PERMISSIONS})
 
    add_custom_target (uninstall
-      COMMAND call "${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}"
+      COMMAND "${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}"
    )
 else ()
    install (CODE "
@@ -68,6 +68,28 @@ else ()
          OUTPUT_FILE
             \"${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}\"
       )
+
+      # Ensure generated uninstall script has executable permissions.
+      if (\"${CMAKE_VERSION}\" VERSION_GREATER_EQUAL \"3.19.0\")
+         file(
+            CHMOD \"${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}\"
+            PERMISSIONS
+                  OWNER_READ OWNER_WRITE OWNER_EXECUTE
+                  GROUP_READ GROUP_EXECUTE
+                  WORLD_READ WORLD_EXECUTE
+         )
+      else ()
+         # Workaround lack of file(CHMOD).
+         file(
+            COPY \"${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}\"
+            DESTINATION \"${UNINSTALL_PROG}.d\"
+            FILE_PERMISSIONS
+                  OWNER_READ OWNER_WRITE OWNER_EXECUTE
+                  GROUP_READ GROUP_EXECUTE
+                  WORLD_READ WORLD_EXECUTE
+         )
+         file(RENAME \"${UNINSTALL_PROG}.d/${UNINSTALL_PROG}\" \"${UNINSTALL_PROG}\")
+      endif ()
    ")
    install (FILES "${CMAKE_CURRENT_BINARY_DIR}/${UNINSTALL_PROG}" DESTINATION "${UNINSTALL_PROG_DIR}" PERMISSIONS ${UNINSTALL_PERMISSIONS})