Add genex support to TEST_LAUNCHER and CROSSCOMPILING_EMULATOR

Evaluate generator expressions in these properties, as they apply to
`add_test`, `add_custom_command`, and `add_custom_target`.

The `CMAKE_CROSSCOMPILING_EMULATOR` variable's `try_run` behavior occurs
at configure time and so cannot support generator expressions.

3 files changed, 31 insertions, 10 deletions

diff --git a/Tests/RunCMake/add_test/TestLauncher-check.cmake b/Tests/RunCMake/add_test/TestLauncher-check.cmake
index add1105..d1396c2 100644
--- a/Tests/RunCMake/add_test/TestLauncher-check.cmake
+++ b/Tests/RunCMake/add_test/TestLauncher-check.cmake
@@ -8,27 +8,31 @@ endif()
 
 set(error_details "There is a problem with generated test file:\n  ${testfile}")
 
-if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncher [^\n]+pseudo_emulator[^\n]+\n")
+if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncher [^$<>\n]+pseudo_emulator[^$<>\n]+\n")
   set(RunCMake_TEST_FAILED "Used test launcher when it should not be used. ${error_details}")
   return()
 endif()
 
-if(NOT testfile_contents MATCHES "add_test[(]UsesTestLauncher [^\n]+pseudo_emulator[^\n]+\n")
+if(NOT testfile_contents MATCHES "add_test[(]UsesTestLauncher [^$<>\n]+pseudo_emulator[^$<>\n]+\n")
   set(RunCMake_TEST_FAILED "Did not use test launcher when it should be used. ${error_details}")
   return()
 endif()
 
-if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncherWithGenex [^\n]+pseudo_emulator[^\n]+\n")
+if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncherWithGenex [^$<>\n]+pseudo_emulator[^$<>\n]+\n")
   set(RunCMake_TEST_FAILED "Used test launcher when it should not be used. ${error_details}")
   return()
 endif()
 
-if(NOT testfile_contents MATCHES "add_test[(]UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex [^\n]+pseudo_emulator[^\n]+\n")
+if(NOT testfile_contents MATCHES "add_test[(]UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex [^$<>\n]+pseudo_emulator[^$<>\n]+\n")
   set(RunCMake_TEST_FAILED "Did not use test launcher when it should be used. ${error_details}")
   return()
 endif()
 
-if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex [^\n]+pseudo_emulator[^\n]+\n")
+if(testfile_contents MATCHES "add_test[(]DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex [^$<>\n]+pseudo_emulator[^$<>\n]+\n")
   set(RunCMake_TEST_FAILED "Used test launcher when it should not be used. ${error_details}")
   return()
 endif()
+
+if(NOT testfile_contents MATCHES "add_test[(]UsesLocalLauncher [^$<>\n]+local_launcher[^$<>\n]+use_launcher_local[^$<>\n]+\n")
+  message(SEND_ERROR "Did not use local test launcher when it should be used. ${error_details}")
+endif()
diff --git a/Tests/RunCMake/add_test/TestLauncher-test-stdout.txt b/Tests/RunCMake/add_test/TestLauncher-test-stdout.txt
index 10d79d4..a028f42 100644
--- a/Tests/RunCMake/add_test/TestLauncher-test-stdout.txt
+++ b/Tests/RunCMake/add_test/TestLauncher-test-stdout.txt
@@ -7,7 +7,7 @@ test 1
 ]*/Tests/RunCMake/add_test/TestLauncher-build
 1: Test timeout computed to be: [0-9]+
 1: Hi
-1/5 Test #1: DoesNotUseLauncher [.]* +Passed +[0-9.]+ sec
+1/6 Test #1: DoesNotUseLauncher [.]* +Passed +[0-9.]+ sec
 test 2
     Start 2: UsesTestLauncher
 +
@@ -17,7 +17,7 @@ test 2
 ]*Tests/RunCMake/add_test/TestLauncher-build
 2: Test timeout computed to be: [0-9]+
 2: Command: "[^"]*/Tests/RunCMake/add_test/TestLauncher-build(/Debug)?/exe(\.exe)?"
-2/5 Test #2: UsesTestLauncher [.]* +Passed +[0-9.]+ sec
+2/6 Test #2: UsesTestLauncher [.]* +Passed +[0-9.]+ sec
 test 3
     Start 3: DoesNotUseTestLauncherWithGenex
 +
@@ -26,7 +26,7 @@ test 3
 3: Working Directory: [^
 ]*Tests/RunCMake/add_test/TestLauncher-build
 3: Test timeout computed to be: [0-9]+
-3/5 Test #3: DoesNotUseTestLauncherWithGenex [.]* +Passed +[0-9.]+ sec
+3/6 Test #3: DoesNotUseTestLauncherWithGenex [.]* +Passed +[0-9.]+ sec
 test 4
     Start 4: UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex
 +
@@ -36,7 +36,7 @@ test 4
 ]*Tests/RunCMake/add_test/TestLauncher-build
 4: Test timeout computed to be: [0-9]+
 4: Command: "[^"]*/Tests/RunCMake/add_test/TestLauncher-build/TestLauncher(/Debug)?/subdir_exe_no_genex(\.exe)?"
-4/5 Test #4: UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex [.]* +Passed +[0-9.]+ sec
+4/6 Test #4: UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex [.]* +Passed +[0-9.]+ sec
 test 5
     Start 5: DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex
 +
@@ -45,4 +45,14 @@ test 5
 5: Working Directory: [^
 ]*Tests/RunCMake/add_test/TestLauncher-build
 5: Test timeout computed to be: [0-9]+
-5/5 Test #5: DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex [.]* +Passed +[0-9.]+ sec
+5/6 Test #5: DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex [.]* +Passed +[0-9.]+ sec
+test 6
+    Start 6: UsesLocalLauncher
+
+6: Test command: "?[^
+]*[/\]Tests[/\]RunCMake[/\]add_test[/\]TestLauncher-build([/\]Debug)?[/\]local_launcher(\.exe)?"? "[^"]*/Tests/RunCMake/add_test/TestLauncher-build(/Debug)?/use_launcher_local(\.exe)?"
+6: Working Directory: [^
+]*/Tests/RunCMake/add_test/TestLauncher-build
+6: Test timeout computed to be: [0-9]+
+6: Command: "[^"]*/Tests/RunCMake/add_test/TestLauncher-build(/Debug)?/use_launcher_local(\.exe)?"
+6/6 Test #6: UsesLocalLauncher [.]* +Passed +[0-9.]+ sec
diff --git a/Tests/RunCMake/add_test/TestLauncher.cmake b/Tests/RunCMake/add_test/TestLauncher.cmake
index 023b663..bef441d 100644
--- a/Tests/RunCMake/add_test/TestLauncher.cmake
+++ b/Tests/RunCMake/add_test/TestLauncher.cmake
@@ -5,6 +5,8 @@ add_test(NAME DoesNotUseLauncher
   COMMAND ${CMAKE_COMMAND} -E echo "Hi")
 
 add_executable(exe main.c)
+get_property(test_launcher TARGET exe PROPERTY TEST_LAUNCHER)
+set_property(TARGET exe PROPERTY TEST_LAUNCHER "$<1:${test_launcher}>")
 
 add_test(NAME UsesTestLauncher
   COMMAND exe)
@@ -19,3 +21,8 @@ add_test(NAME UsesTestLauncherWithExecTargetFromSubdirAddedWithoutGenex
 
 add_test(NAME DoesNotUseTestLauncherWithExecTargetFromSubdirAddedWithGenex
   COMMAND $<TARGET_FILE:subdir_exe_with_genex>)
+
+add_executable(local_launcher ../pseudo_emulator.c)
+add_executable(use_launcher_local main.c)
+set_property(TARGET use_launcher_local PROPERTY TEST_LAUNCHER "$<TARGET_FILE:local_launcher>")
+add_test(NAME UsesLocalLauncher COMMAND use_launcher_local)