cmConstStack: Factor out of cmListFileBacktrace

This presents value semantics for a stack of constant values.
Internally it shares ownership to avoid copies.  Previously
this was implemented by `cmListFileBacktrace` explicitly,
but the approach can be re-used for other kinds of stacks.

1 files changed, 1 insertions, 1 deletions

diff --git a/Source/cmInstallSubdirectoryGenerator.h b/Source/cmInstallSubdirectoryGenerator.h
index f174d07..7a472ed 100644
--- a/Source/cmInstallSubdirectoryGenerator.h
+++ b/Source/cmInstallSubdirectoryGenerator.h
@@ -8,8 +8,8 @@
 #include <string>
 
 #include "cmInstallGenerator.h"
-#include "cmListFileCache.h"
 
+class cmListFileBacktrace;
 class cmLocalGenerator;
 class cmMakefile;