InstallRequiredSystemLibraries: Refactor to avoid macros

For a given `MSVC_VERSION` our macros were each called at most once.
Replace them with a single code path that is parameterized over what
was the macro argument.

Modules/InstallRequiredSystemLibraries.cmake

@@ -160,8 +160,20 @@ if(MSVC)
     endif()
   endif()
 
-  macro(MSVCRT_FILES_FOR_VERSION version)
-    set(v "${version}")
+  if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
+    set(_MSVCRT_VERSION 14)
+  elseif(MSVC_VERSION EQUAL 1800)
+    set(_MSVCRT_VERSION 12)
+  elseif(MSVC_VERSION EQUAL 1700)
+    set(_MSVCRT_VERSION 11)
+  elseif(MSVC_VERSION EQUAL 1600)
+    set(_MSVCRT_VERSION 10)
+  else()
+    set(_MSVCRT_VERSION "")
+  endif()
+
+  if(_MSVCRT_VERSION)
+    set(v "${_MSVCRT_VERSION}")
 
     # Find the runtime library redistribution directory.
     get_filename_component(msvc_install_dir
@@ -232,22 +244,6 @@ if(MSVC)
         list(APPEND __install__libs ${__ucrt_dlls})
       endif()
     endif()
-  endmacro()
-
-  if(MSVC_VERSION EQUAL 1600)
-    MSVCRT_FILES_FOR_VERSION(10)
-  endif()
-
-  if(MSVC_VERSION EQUAL 1700)
-    MSVCRT_FILES_FOR_VERSION(11)
-  endif()
-
-  if(MSVC_VERSION EQUAL 1800)
-    MSVCRT_FILES_FOR_VERSION(12)
-  endif()
-
-  if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
-    MSVCRT_FILES_FOR_VERSION(14)
   endif()
 
   if(CMAKE_INSTALL_MFC_LIBRARIES)
@@ -351,8 +347,20 @@ if(MSVC)
         )
     endif()
 
-    macro(MFC_FILES_FOR_VERSION version)
-      set(v "${version}")
+    if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
+      set(_MFC_VERSION 14)
+    elseif(MSVC_VERSION EQUAL 1800)
+      set(_MFC_VERSION 12)
+    elseif(MSVC_VERSION EQUAL 1700)
+      set(_MFC_VERSION 11)
+    elseif(MSVC_VERSION EQUAL 1600)
+      set(_MFC_VERSION 10)
+    else()
+      set(_MFC_VERSION "")
+    endif()
+
+    if(_MFC_VERSION)
+      set(v "${_MFC_VERSION}")
 
       # Multi-Byte Character Set versions of MFC are available as optional
       # addon since Visual Studio 12.  So for version 12 or higher, check
@@ -401,56 +409,44 @@ if(MSVC)
         "${MSVC${v}_MFCLOC_DIR}/mfc${v}0kor.dll"
         "${MSVC${v}_MFCLOC_DIR}/mfc${v}0rus.dll"
         )
-    endmacro()
-
-    if(MSVC_VERSION EQUAL 1600)
-      MFC_FILES_FOR_VERSION(10)
-    endif()
-
-    if(MSVC_VERSION EQUAL 1700)
-      MFC_FILES_FOR_VERSION(11)
-    endif()
-
-    if(MSVC_VERSION EQUAL 1800)
-      MFC_FILES_FOR_VERSION(12)
-    endif()
-
-    if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
-      MFC_FILES_FOR_VERSION(14)
     endif()
   endif()
 
   # MSVC 8 was the first version with OpenMP
   # Furthermore, there is no debug version of this
   if(CMAKE_INSTALL_OPENMP_LIBRARIES)
-    macro(OPENMP_FILES_FOR_VERSION version_a version_b)
-      set(va "${version_a}")
-      set(vb "${version_b}")
+    if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
+      set(_MSOMP_VAR_VER 14)
+      set(_MSOMP_VERSION 140)
+    elseif(MSVC_VERSION EQUAL 1800)
+      set(_MSOMP_VAR_VER 12)
+      set(_MSOMP_VERSION 120)
+    elseif(MSVC_VERSION EQUAL 1700)
+      set(_MSOMP_VAR_VER 11)
+      set(_MSOMP_VERSION 110)
+    elseif(MSVC_VERSION EQUAL 1600)
+      set(_MSOMP_VAR_VER 10)
+      set(_MSOMP_VERSION 100)
+    elseif(MSVC_VERSION EQUAL 1500)
+      set(_MSOMP_VAR_VER 90)
+      set(_MSOMP_VERSION 90)
+    elseif(MSVC_VERSION EQUAL 1400)
+      set(_MSOMP_VAR_VER 80)
+      set(_MSOMP_VERSION 80)
+    else()
+      set(_MSOMP_VAR_VER "")
+      set(_MSOMP_VERSION "")
+    endif()
+
+    if(_MSOMP_VERSION)
+      set(va "${_MSOMP_VAR_VER}")
+      set(vb "${_MSOMP_VERSION}")
       set(MSVC${va}_OPENMP_DIR "${MSVC${va}_REDIST_DIR}/${CMAKE_MSVC_ARCH}/Microsoft.VC${vb}.OPENMP")
 
       if(NOT CMAKE_INSTALL_DEBUG_LIBRARIES_ONLY)
         set(__install__libs ${__install__libs}
           "${MSVC${va}_OPENMP_DIR}/vcomp${vb}.dll")
       endif()
-    endmacro()
-
-    if(MSVC_VERSION EQUAL 1400)
-      OPENMP_FILES_FOR_VERSION(80 80)
-    endif()
-    if(MSVC_VERSION EQUAL 1500)
-      OPENMP_FILES_FOR_VERSION(90 90)
-    endif()
-    if(MSVC_VERSION EQUAL 1600)
-      OPENMP_FILES_FOR_VERSION(10 100)
-    endif()
-    if(MSVC_VERSION EQUAL 1700)
-      OPENMP_FILES_FOR_VERSION(11 110)
-    endif()
-    if(MSVC_VERSION EQUAL 1800)
-      OPENMP_FILES_FOR_VERSION(12 120)
-    endif()
-    if(MSVC_VERSION EQUAL 1900 OR MSVC_VERSION EQUAL 1910)
-      OPENMP_FILES_FOR_VERSION(14 140)
     endif()
   endif()