add_custom_command: Fix dependency on macOS framework target

When the `DEPENDS` option names a logical target name, convert to the
"real" path of that target rather than any of the symlink-provided
alternative file names.  This makes the dependencies consistent with the
outputs named by link rules producing the target artifacts.

Fixes: #20264

2 files changed, 12 insertions, 0 deletions

diff --git a/Tests/CustomCommand/CMakeLists.txt b/Tests/CustomCommand/CMakeLists.txt
index 196fea3..53d56bf 100644
--- a/Tests/CustomCommand/CMakeLists.txt
+++ b/Tests/CustomCommand/CMakeLists.txt
@@ -566,3 +566,11 @@ add_custom_command(
 )
 
 add_custom_target(depends_on_in_rel_source_path ALL DEPENDS "depends_on_in_rel_source_path.txt")
+
+add_library(mac_fw SHARED mac_fw.c)
+set_target_properties(mac_fw PROPERTIES
+  FRAMEWORK 1
+  LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib
+  )
+add_custom_command(OUTPUT mac_fw.txt COMMAND ${CMAKE_COMMAND} -E touch mac_fw.txt DEPENDS mac_fw)
+add_custom_target(drive_mac_fw ALL DEPENDS mac_fw.txt)
diff --git a/Tests/CustomCommand/mac_fw.c b/Tests/CustomCommand/mac_fw.c
new file mode 100644
index 0000000..cb35b44
--- /dev/null
+++ b/Tests/CustomCommand/mac_fw.c
@@ -0,0 +1,4 @@
+int mac_fw(void)
+{
+  return 0;
+}