Reduce raw string pointers usage.

* Change some functions to take `std::string` instead of
  `const char*` in the following classes: `cmMakeFile`, `cmake`,
  `cmCoreTryCompile`, `cmSystemTools`,  `cmState`, `cmLocalGenerator`
  and a few others.
* Greatly reduce using of `const char*` overloads for
  `cmSystemTools::MakeDirectory` and `cmSystemTools::RelativePath`.
* Remove many redundant `c_str()` conversions throughout the code.

1 files changed, 2 insertions, 1 deletions

diff --git a/Source/cmLocalUnixMakefileGenerator3.h b/Source/cmLocalUnixMakefileGenerator3.h
index 2d580d5624..bc72f1b307 100644
--- a/Source/cmLocalUnixMakefileGenerator3.h
+++ b/Source/cmLocalUnixMakefileGenerator3.h
@@ -117,7 +117,8 @@ public:
 
   // create a command that cds to the start dir then runs the commands
   void CreateCDCommand(std::vector<std::string>& commands,
-                       const char* targetDir, std::string const& relDir);
+                       std::string const& targetDir,
+                       std::string const& relDir);
 
   static std::string ConvertToQuotedOutputPath(const char* p,
                                                bool useWatcomQuote);