cmDepends: Refactor cmDepends::CheckDependencies method

This patch changes the following issues in `cmDepends::CheckDependencies`:

- Use the `std::string` based `std::getline` interface to read lines from a
  file instead of using raw reads into raw buffers.
- To reduce the file system access, we load file times only once from
  `cmFileTimeCache` and keep them on the stack for later comparison.
- When a file is removed from the file system we remove it from the
  `cmFileTimeCache` as well.

1 files changed, 0 insertions, 5 deletions

diff --git a/Source/cmDepends.h b/Source/cmDepends.h
index fc6571d..d9d5c67 100644
--- a/Source/cmDepends.h
+++ b/Source/cmDepends.h
@@ -8,7 +8,6 @@
 #include <iosfwd>
 #include <map>
 #include <set>
-#include <stddef.h>
 #include <string>
 #include <vector>
 
@@ -105,10 +104,6 @@ protected:
   // The full path to the target's build directory.
   std::string TargetDirectory;
 
-  size_t MaxPath = 16384;
-  char* Dependee;
-  char* Depender;
-
   // The include file search path.
   std::vector<std::string> IncludePath;