regex: Use static regexs where possible

Rather than declaring and compiling a constant regex every time a chunk
of code is executed, build the regex once.

Source/CPack/cmCPackNSISGenerator.cxx

@@ -588,8 +588,8 @@ void cmCPackNSISGenerator::CreateMenuLinks( cmOStringStream& str,
     return;
     }
 
-  cmsys::RegularExpression urlRegex;
-  urlRegex.compile("^(mailto:|(ftps?|https?|news)://).*$");
+  static cmsys::RegularExpression
+    urlRegex("^(mailto:|(ftps?|https?|news)://).*$");
 
   std::vector<std::string>::iterator it;
   for ( it = cpackMenuLinksVector.begin();

Source/cmComputeLinkInformation.cxx

@@ -1831,8 +1831,8 @@ cmComputeLinkInformation::AddLibraryRuntimeInfo(std::string const& fullPath)
     {
     if(fullPath.find(".framework") != std::string::npos)
       {
-      cmsys::RegularExpression splitFramework;
-      splitFramework.compile("^(.*)/(.*).framework/(.*)$");
+      static cmsys::RegularExpression
+        splitFramework("^(.*)/(.*).framework/(.*)$");
       if(splitFramework.find(fullPath) &&
         (std::string::npos !=
          splitFramework.match(3).find(splitFramework.match(2))))

Source/cmGeneratorExpression.cxx

@@ -469,12 +469,11 @@ std::string::size_type cmGeneratorExpression::Find(const std::string &input)
 //----------------------------------------------------------------------------
 bool cmGeneratorExpression::IsValidTargetName(const std::string &input)
 {
-  cmsys::RegularExpression targetNameValidator;
   // The ':' is supported to allow use with IMPORTED targets. At least
   // Qt 4 and 5 IMPORTED targets use ':' as the namespace delimiter.
-  targetNameValidator.compile("^[A-Za-z0-9_.:+-]+$");
+  static cmsys::RegularExpression targetNameValidator("^[A-Za-z0-9_.:+-]+$");
 
-  return targetNameValidator.find(input.c_str());
+  return targetNameValidator.find(input);
 }
 
 //----------------------------------------------------------------------------

Source/cmGeneratorExpressionEvaluator.cxx

@@ -401,8 +401,7 @@ struct CompilerIdNode : public cmGeneratorExpressionNode
       {
       return compilerId ? compilerId : "";
       }
-    cmsys::RegularExpression compilerIdValidator;
-    compilerIdValidator.compile("^[A-Za-z0-9_]*$");
+    static cmsys::RegularExpression compilerIdValidator("^[A-Za-z0-9_]*$");
     if (!compilerIdValidator.find(parameters.begin()->c_str()))
       {
       reportError(context, content->GetOriginalExpression(),
@@ -509,8 +508,7 @@ struct CompilerVersionNode : public cmGeneratorExpressionNode
       return compilerVersion ? compilerVersion : "";
       }
 
-    cmsys::RegularExpression compilerIdValidator;
-    compilerIdValidator.compile("^[0-9\\.]*$");
+    static cmsys::RegularExpression compilerIdValidator("^[0-9\\.]*$");
     if (!compilerIdValidator.find(parameters.begin()->c_str()))
       {
       reportError(context, content->GetOriginalExpression(),
@@ -711,8 +709,7 @@ static const struct ConfigurationTestNode : public cmGeneratorExpressionNode
       {
       return configurationNode.Evaluate(parameters, context, content, 0);
       }
-    cmsys::RegularExpression configValidator;
-    configValidator.compile("^[A-Za-z0-9_]*$");
+    static cmsys::RegularExpression configValidator("^[A-Za-z0-9_]*$");
     if (!configValidator.find(parameters.begin()->c_str()))
       {
       reportError(context, content->GetOriginalExpression(),
@@ -884,8 +881,7 @@ static const struct TargetPropertyNode : public cmGeneratorExpressionNode
           "$<TARGET_PROPERTY:...> expression requires one or two parameters");
       return std::string();
       }
-    cmsys::RegularExpression propertyNameValidator;
-    propertyNameValidator.compile("^[A-Za-z0-9_]+$");
+    static cmsys::RegularExpression propertyNameValidator("^[A-Za-z0-9_]+$");
 
     cmTarget const* target = context->HeadTarget;
     std::string propertyName = *parameters.begin();

Source/cmOrderDirectories.cxx

@@ -39,8 +39,8 @@ public:
 
     if(file.rfind(".framework") != std::string::npos)
       {
-      cmsys::RegularExpression splitFramework;
-      splitFramework.compile("^(.*)/(.*).framework/(.*)$");
+      static cmsys::RegularExpression
+        splitFramework("^(.*)/(.*).framework/(.*)$");
       if(splitFramework.find(file) &&
         (std::string::npos !=
          splitFramework.match(3).find(splitFramework.match(2))))
@@ -326,8 +326,8 @@ void cmOrderDirectories::AddRuntimeLibrary(std::string const& fullPath,
 
       if(fullPath.rfind(".framework") != std::string::npos)
         {
-        cmsys::RegularExpression splitFramework;
-        splitFramework.compile("^(.*)/(.*).framework/(.*)$");
+        static cmsys::RegularExpression
+          splitFramework("^(.*)/(.*).framework/(.*)$");
         if(splitFramework.find(fullPath) &&
           (std::string::npos !=
            splitFramework.match(3).find(splitFramework.match(2))))