Tests: Nudge MFC test to pass on VS 6 dashboards (#11213)

InstallRequiredSystemLibraries does not install any dlls when
used with VS 6 dashboards. Modify the ValidateBuild script to
expect only 1 file when building with VS 6.

Using "-DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>" does not work when
<INSTALL_DIR> evaluates to a long enough string. However, using
"-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>" does work, even with
the longer strings. So: make sure to include the ":PATH" when using
this construct with ExternalProject calls so that they may install
to the proper location on VS 6 builds. All existing calls that match
"CMAKE_INSTALL_PREFIX.*INSTALL_DIR" include the ":PATH" after this
commit.

By the way: https://twitter.com/DLRdave/status/134339505397309440

Tests/ExternalProject/Example/CMakeLists.txt

@@ -6,6 +6,6 @@ include(ExternalProject)
 ExternalProject_Add(
   cmake281
   URL http://www.cmake.org/files/v2.8/cmake-2.8.1.tar.gz
-  CMAKE_ARGS -D CMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
   BUILD_COMMAND ""
 )

Tests/MFC/CMakeLists.txt

@@ -17,7 +17,7 @@ ExternalProject_Add(mfcShared
   PATCH_COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_BINARY_DIR}/CMakeLists.SharedMfcDll.txt
     <SOURCE_DIR>/CMakeLists.txt
-  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
   )
 
 
@@ -33,7 +33,7 @@ ExternalProject_Add(mfcStatic
   PATCH_COMMAND ${CMAKE_COMMAND} -E copy
     ${CMAKE_CURRENT_BINARY_DIR}/CMakeLists.StaticMfcLib.txt
     <SOURCE_DIR>/CMakeLists.txt
-  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
   )
 
 

Tests/MFC/ValidateBuild.cmake.in

@@ -31,9 +31,17 @@ message(STATUS "===== mfcShared install tree =====")
 file(GLOB_RECURSE files "${binary_dir}/mfcShared-prefix/bin/*.*")
 message(STATUS "mfcShared files='${files}'")
 list(LENGTH files len)
-if(len LESS 3)
+
+set(msvc6 "@MSVC60@")
+if("${msvc6}" STREQUAL "1")
+  set(expected_minimum_file_count 1)
+else()
+  set(expected_minimum_file_count 3)
+endif()
+
+if(len LESS ${expected_minimum_file_count})
   message(FATAL_ERROR
-    "len='${len}' is less than '3' (count of shared 'bin' files)")
+    "len='${len}' is less than '${expected_minimum_file_count}' (count of shared 'bin' files)")
 endif()
 foreach(f ${files})
   message(STATUS "file '${f}'")