diff -ur kicad-4.0.7/CMakeLists.txt kicad-4.0.7_patched/CMakeLists.txt
--- kicad-4.0.7/CMakeLists.txt	2017-08-28 17:31:31.000000000 +0300
+++ kicad-4.0.7_patched/CMakeLists.txt	2017-09-03 16:28:39.391735474 +0300
@@ -206,7 +206,6 @@
     endif()
 
     if( MINGW )
-        set( CMAKE_EXE_LINKER_FLAGS_RELEASE "-s" )
 
         # _UNICODE definition seems needed under mingw/gcc 4.8
         # (Kicad uses unicode, and on Windows, wxWidgets >= 2.9.4 is mandatory
@@ -255,8 +254,6 @@
             set( CMAKE_SHARED_LINKER_FLAGS "${TO_LINKER},--no-undefined" )
             set( CMAKE_MODULE_LINKER_FLAGS "${TO_LINKER},--no-undefined" )
 
-            set( CMAKE_EXE_LINKER_FLAGS_RELEASE "-s" )
-
             # Defeat ELF's ability to use the GOT to replace locally implemented functions
             # with ones from another module.
             # https://bugs.launchpad.net/kicad/+bug/1322354