It'd be better to resort exports.def. Example:
...
; winuser_wcecl.cpp
LoadIconW=LoadIconW_WCECL @510
LoadBitmapW=LoadBitmapW_WCECL @511
; imm_wcecl.cpp
ImmThing @1
ImmUse @42
; strsafe_wcecl.cpp
StringCchCopyW=StringCchCopyW_WCECL @1689
StringCchPrintfExW=StringCchPrintfExW_WCECL @1701
StringCchPrintfW=StringCchPrintfW_WCECL @1699
StringCbPrintfW=StringCbPrintfW_WCECL @1700
StringCchCopyExW=StringCchCopyExW_WCECL @1691
StringCchVPrintfW=StringCchVPrintfW_WCECL @1697
...