From e02f677f61030f6c74f06ecd56092521dd68cab4 Mon Sep 17 00:00:00 2001
From: Josef Angstenberger <code@jtxa.de>
Date: Sun, 20 Sep 2020 17:38:09 +0200
Subject: Tests: Add test for early source lookup of file(GENERATE)

The output file structures of file(GENERATE) have to be created early to
be able to use the generated files in source lists.

This was not done correctly for subdirectories which has been fixed
in commit aee2c51224 (file(GENERATE): Create output file structures for
all directories first, 2020-09-10).

Add a test case to address issue #21144.
---
 Tests/RunCMake/File_Generate/GenerateSource.cmake          | 3 +++
 Tests/RunCMake/File_Generate/GenerateSource/CMakeLists.txt | 8 ++++++++
 2 files changed, 11 insertions(+)
 create mode 100644 Tests/RunCMake/File_Generate/GenerateSource/CMakeLists.txt

diff --git a/Tests/RunCMake/File_Generate/GenerateSource.cmake b/Tests/RunCMake/File_Generate/GenerateSource.cmake
index 147a7f6..d5504e3 100644
--- a/Tests/RunCMake/File_Generate/GenerateSource.cmake
+++ b/Tests/RunCMake/File_Generate/GenerateSource.cmake
@@ -10,3 +10,6 @@ file(GENERATE
 )
 
 add_executable(mn "${CMAKE_CURRENT_BINARY_DIR}/main.cpp")
+
+add_subdirectory(GenerateSource)
+target_link_libraries(mn PRIVATE ObjLib)
diff --git a/Tests/RunCMake/File_Generate/GenerateSource/CMakeLists.txt b/Tests/RunCMake/File_Generate/GenerateSource/CMakeLists.txt
new file mode 100644
index 0000000..bca8922
--- /dev/null
+++ b/Tests/RunCMake/File_Generate/GenerateSource/CMakeLists.txt
@@ -0,0 +1,8 @@
+add_library(ObjLib OBJECT)
+
+target_sources(ObjLib PRIVATE "${CMAKE_CURRENT_BINARY_DIR}/ObjLib.cpp")
+
+# Ensure re-generation
+file(REMOVE "${CMAKE_CURRENT_BINARY_DIR}/ObjLib.cpp")
+
+file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/ObjLib.cpp" CONTENT "")
-- 
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