Use std::replace for replacing chars in strings.

Find uses of `cmSystemTools::ReplaceString` where both `replace` and
`with` are string literals with a size of one.

Automate with:

git grep -l ReplaceString | xargs sed -i "s|cmSystemTools::ReplaceString(\([^,]*\), \"\(.\)\", \"\(.\)\");|std::replace(\1.begin(), \1.end(), '\2', '\3');|g"
git grep -l ReplaceString | xargs sed -i "s|cmSystemTools::ReplaceString(\([^,]*\), \"\(.\)\", \"\\\\\\\\\");|std::replace(\1.begin(), \1.end(), '\2', '\\\\\\\\');|g"
git grep -l ReplaceString | xargs sed -i "s|cmSystemTools::ReplaceString(\([^,]*\), \"\\\\\\\\\", \"\(.\)\");|std::replace(\1.begin(), \1.end(), '\\\\\\\\', '\2');|g"

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmGlobalGhsMultiGenerator.cxx b/Source/cmGlobalGhsMultiGenerator.cxx
index 8a80f46..0ae913e 100644
--- a/Source/cmGlobalGhsMultiGenerator.cxx
+++ b/Source/cmGlobalGhsMultiGenerator.cxx
@@ -214,7 +214,7 @@ void cmGlobalGhsMultiGenerator::OpenBuildFileStream()
     this->GetCMakeInstance()->MarkCliAsUsed("GHS_OS_DIR");
   }
   std::string fOSDir(this->trimQuotes(osDir));
-  cmSystemTools::ReplaceString(fOSDir, "\\", "/");
+  std::replace(fOSDir.begin(), fOSDir.end(), '\\', '/');
   if (!fOSDir.empty() && ('c' == fOSDir[0] || 'C' == fOSDir[0])) {
     this->OSDirRelative = false;
   } else {
@@ -230,7 +230,7 @@ void cmGlobalGhsMultiGenerator::OpenBuildFileStream()
     this->GetCMakeInstance()->MarkCliAsUsed("GHS_BSP_NAME");
   }
   std::string fBspName(this->trimQuotes(bspName));
-  cmSystemTools::ReplaceString(fBspName, "\\", "/");
+  std::replace(fBspName.begin(), fBspName.end(), '\\', '/');
   this->WriteMacros();
   this->WriteHighLevelDirectives();