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

1 files changed, 4 insertions, 0 deletions

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;
+}