OPTIMIZE_DEPENDENCIES: Skip order-only deps for non-linking targets

Fixes: #21517

6 files changed, 46 insertions, 0 deletions

diff --git a/Tests/RunCMake/DependencyGraph/RunCMakeTest.cmake b/Tests/RunCMake/DependencyGraph/RunCMakeTest.cmake
index 891e138..6847a23 100644
--- a/Tests/RunCMake/DependencyGraph/RunCMakeTest.cmake
+++ b/Tests/RunCMake/DependencyGraph/RunCMakeTest.cmake
@@ -59,3 +59,5 @@ run_optimize_test(OptimizeStatic StaticTop)
 if(CMAKE_Fortran_COMPILER)
   run_optimize_test(OptimizeFortran FortranTop)
 endif()
+
+run_cmake_build(RuntimeTargets mylib SharedTop)
diff --git a/Tests/RunCMake/DependencyGraph/RuntimeTargets.cmake b/Tests/RunCMake/DependencyGraph/RuntimeTargets.cmake
new file mode 100644
index 0000000..21531cd
--- /dev/null
+++ b/Tests/RunCMake/DependencyGraph/RuntimeTargets.cmake
@@ -0,0 +1,18 @@
+enable_language(C)
+
+set(CMAKE_OPTIMIZE_DEPENDENCIES TRUE)
+add_library(mylib STATIC mylib.c)
+add_library(neverbuild SHARED neverbuild.c)
+
+# Building mylib should not require building neverbuild
+target_link_libraries(mylib PRIVATE neverbuild)
+set_target_properties(neverbuild PROPERTIES EXCLUDE_FROM_ALL YES)
+
+# Building SharedTop should require SharedBottom to be built
+add_library(SharedTop SHARED top.c)
+add_library(StaticMiddle STATIC middle.c)
+add_library(SharedBottom SHARED bottom.c)
+target_link_libraries(SharedTop PRIVATE StaticMiddle)
+target_link_libraries(StaticMiddle PRIVATE SharedBottom)
+set_target_properties(StaticMiddle SharedBottom PROPERTIES EXCLUDE_FROM_ALL YES)
+set_target_properties(StaticMiddle PROPERTIES POSITION_INDEPENDENT_CODE YES)
diff --git a/Tests/RunCMake/DependencyGraph/bottom.c b/Tests/RunCMake/DependencyGraph/bottom.c
new file mode 100644
index 0000000..c8ea481
--- /dev/null
+++ b/Tests/RunCMake/DependencyGraph/bottom.c
@@ -0,0 +1,7 @@
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+  int bottom(void)
+{
+  return 23;
+}
diff --git a/Tests/RunCMake/DependencyGraph/middle.c b/Tests/RunCMake/DependencyGraph/middle.c
new file mode 100644
index 0000000..3b1b84c
--- /dev/null
+++ b/Tests/RunCMake/DependencyGraph/middle.c
@@ -0,0 +1,9 @@
+#ifdef _WIN32
+__declspec(dllimport)
+#endif
+  int bottom(void);
+
+int middle(void)
+{
+  return bottom() + 19;
+}
diff --git a/Tests/RunCMake/DependencyGraph/neverbuild.c b/Tests/RunCMake/DependencyGraph/neverbuild.c
new file mode 100644
index 0000000..e490510
--- /dev/null
+++ b/Tests/RunCMake/DependencyGraph/neverbuild.c
@@ -0,0 +1 @@
+#error I should not be built
diff --git a/Tests/RunCMake/DependencyGraph/top.c b/Tests/RunCMake/DependencyGraph/top.c
new file mode 100644
index 0000000..eceb0a5
--- /dev/null
+++ b/Tests/RunCMake/DependencyGraph/top.c
@@ -0,0 +1,9 @@
+int middle(void);
+
+#ifdef _WIN32
+__declspec(dllexport)
+#endif
+  int top(void)
+{
+  return middle() + 2;
+}