GENERATED prop: Check CMP0118 policy and warn in certain situations

* Adding tests for CMP0118 being unset (aka set to `WARN`).
* Adjusting the (unrelated) RunCMake.CMP0026 test to set CMP0118 to
  `NEW`,
* Adjusting the (unrelated) RunCMake.Ninja test to set CMP0118 to `OLD`.
* Adjusting the (unrelated) RunCMake.FileAPI test to set CMP0118 to
  `OLD`.

Note:
Setting CMP0118 to `NEW` and modifying the `GENERATED` property with
`set_property` or `set_source_files_properties` will currently NOT set
that property because the implementation is still to come.

1 files changed, 93 insertions, 0 deletions

diff --git a/Tests/RunCMake/CMP0118/CMP0118-WARN-Test3-stderr.txt b/Tests/RunCMake/CMP0118/CMP0118-WARN-Test3-stderr.txt
new file mode 100644
index 0000000..ea32cbf
--- /dev/null
+++ b/Tests/RunCMake/CMP0118/CMP0118-WARN-Test3-stderr.txt
@@ -0,0 +1,93 @@
+^Generated_with_full_path1\.cpp: # 1a # GENERATED = `1`
+Generated_with_full_path1\.cpp: # 1b # GENERATED = `1`
+Generated_with_full_path1\.cpp: # 2a # GENERATED = `1`
+Generated_with_full_path1\.cpp: # 2b # GENERATED = `1`
+Generated_with_full_path1\.cpp: # 3a # GENERATED = ``
+Generated_with_full_path1\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_full_path2\.cpp: # 1a # GENERATED = `1`
+Generated_with_full_path2\.cpp: # 1b # GENERATED = `1`
+Generated_with_full_path2\.cpp: # 2a # GENERATED = `1`
+Generated_with_full_path2\.cpp: # 2b # GENERATED = `1`
+Generated_with_full_path2\.cpp: # 3a # GENERATED = ``
+Generated_with_full_path2\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_full_path3\.cpp: # 1a # GENERATED = ``
+Generated_with_full_path3\.cpp: # 1b # GENERATED = `NOTFOUND`
+Generated_with_full_path3\.cpp: # 2a # GENERATED = ``
+Generated_with_full_path3\.cpp: # 2b # GENERATED = `NOTFOUND`
+Generated_with_full_path3\.cpp: # 3a # GENERATED = ``
+Generated_with_full_path3\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_relative_path1\.cpp: # 1a # GENERATED = `1`
+Generated_with_relative_path1\.cpp: # 1b # GENERATED = `1`
+Generated_with_relative_path1\.cpp: # 2a # GENERATED = `1`
+Generated_with_relative_path1\.cpp: # 2b # GENERATED = `1`
+Generated_with_relative_path1\.cpp: # 3a # GENERATED = ``
+Generated_with_relative_path1\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_relative_path2\.cpp: # 1a # GENERATED = `1`
+Generated_with_relative_path2\.cpp: # 1b # GENERATED = `1`
+Generated_with_relative_path2\.cpp: # 2a # GENERATED = `1`
+Generated_with_relative_path2\.cpp: # 2b # GENERATED = `1`
+Generated_with_relative_path2\.cpp: # 3a # GENERATED = ``
+Generated_with_relative_path2\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_relative_path3\.cpp: # 1a # GENERATED = ``
+Generated_with_relative_path3\.cpp: # 1b # GENERATED = `NOTFOUND`
+Generated_with_relative_path3\.cpp: # 2a # GENERATED = `1`
+Generated_with_relative_path3\.cpp: # 2b # GENERATED = `1`
+Generated_with_relative_path3\.cpp: # 3a # GENERATED = `1`
+Generated_with_relative_path3\.cpp: # 3b # GENERATED = `1`
+Generated_with_full_source_path1\.cpp: # 1a # GENERATED = `1`
+Generated_with_full_source_path1\.cpp: # 1b # GENERATED = `1`
+Generated_with_full_source_path1\.cpp: # 2a # GENERATED = `1`
+Generated_with_full_source_path1\.cpp: # 2b # GENERATED = `1`
+Generated_with_full_source_path1\.cpp: # 3a # GENERATED = ``
+Generated_with_full_source_path1\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_full_source_path2\.cpp: # 1a # GENERATED = `1`
+Generated_with_full_source_path2\.cpp: # 1b # GENERATED = `1`
+Generated_with_full_source_path2\.cpp: # 2a # GENERATED = `1`
+Generated_with_full_source_path2\.cpp: # 2b # GENERATED = `1`
+Generated_with_full_source_path2\.cpp: # 3a # GENERATED = ``
+Generated_with_full_source_path2\.cpp: # 3b # GENERATED = `NOTFOUND`
+Generated_with_full_source_path3\.cpp: # 1a # GENERATED = ``
+Generated_with_full_source_path3\.cpp: # 1b # GENERATED = `NOTFOUND`
+Generated_with_full_source_path3\.cpp: # 2a # GENERATED = ``
+Generated_with_full_source_path3\.cpp: # 2b # GENERATED = `NOTFOUND`
+Generated_with_full_source_path3\.cpp: # 3a # GENERATED = ``
+Generated_with_full_source_path3\.cpp: # 3b # GENERATED = `NOTFOUND`
+CMake Error at CMP0118-Common-Test3\.cmake:[0-9]+ \(add_executable\):
+  Cannot find source file:
+
+[ \t]*.*Tests/RunCMake/CMP0118/(Generated_with_full_source_path[1-3]\.cpp|CMP0118-WARN-Test3-build/Generated_with_full_path3\.cpp)
+Call Stack \(most recent call first\):
+  CMP0118-WARN-Test3\.cmake:[0-9]+ \(include\)
+  CMakeLists\.txt:[0-9]+ \(include\)
++
+CMake Error at CMP0118-Common-Test3\.cmake:[0-9]+ \(add_executable\):
+  Cannot find source file:
+
+[ \t]*.*Tests/RunCMake/CMP0118/(Generated_with_full_source_path[1-3]\.cpp|CMP0118-WARN-Test3-build/Generated_with_full_path3\.cpp)
+Call Stack \(most recent call first\):
+  CMP0118-WARN-Test3\.cmake:[0-9]+ \(include\)
+  CMakeLists\.txt:[0-9]+ \(include\)
++
+CMake Error at CMP0118-Common-Test3\.cmake:[0-9]+ \(add_executable\):
+  Cannot find source file:
+
+[ \t]*.*Tests/RunCMake/CMP0118/(Generated_with_full_source_path[1-3]\.cpp|CMP0118-WARN-Test3-build/Generated_with_full_path3\.cpp)
+Call Stack \(most recent call first\):
+  CMP0118-WARN-Test3\.cmake:[0-9]+ \(include\)
+  CMakeLists\.txt:[0-9]+ \(include\)
++
+CMake Error at CMP0118-Common-Test3\.cmake:[0-9]+ \(add_executable\):
+  Cannot find source file:
+
+[ \t]*.*Tests/RunCMake/CMP0118/(Generated_with_full_source_path[1-3]\.cpp|CMP0118-WARN-Test3-build/Generated_with_full_path3\.cpp)
+Call Stack \(most recent call first\):
+  CMP0118-WARN-Test3\.cmake:[0-9]+ \(include\)
+  CMakeLists\.txt:[0-9]+ \(include\)
++
+(CMake Error at CMP0118-Common-Test3\.cmake:[0-9]+ \(add_executable\):
+  No SOURCES given to target: executable[13-5]
+Call Stack \(most recent call first\):
+  CMP0118-WARN-Test3\.cmake:[0-9]+ \(include\)
+  CMakeLists\.txt:[0-9]+ \(include\)
++)+
+CMake Generate step failed\.  Build files cannot be regenerated correctly\.$