BUG: fix put/get env problems

Source/cmCTest.cxx

@@ -3019,28 +3019,12 @@ int cmCTest::RunConfigurationScript()
   // set any environment variables
   if (ctestEnv)
     {
-    static char ctestEnvStatic[100][5000];
     std::vector<std::string> envArgs;
     cmSystemTools::ExpandListArgument(ctestEnv,envArgs);
-    int numArgs = envArgs.size();
-    // we have a hard limit of 100 env args due to stupid format of putenv
-    if (numArgs > 100)
-      {
-      numArgs = 100;
-      }
     // for each variable/argument do a putenv
-    int i;
-    for (i = 0; i < numArgs; ++i)
+    for (unsigned i = 0; i < envArgs.size(); ++i)
       {
-      // also limit args to be at most 4K long
-      std::string::size_type size = envArgs[i].size();
-      if(size > 4999)
-        {
-        size = 4999;
-        }
-      strncpy(ctestEnvStatic[i], envArgs[i].c_str(), size);
-      ctestEnvStatic[i][size] = 0;
-      putenv(ctestEnvStatic[i]);
+      cmSystemTools::PutEnv(envArgs[i].c_str());
       }
     }
 

Source/cmGlobalGenerator.cxx

@@ -43,7 +43,7 @@ cmGlobalGenerator::~cmGlobalGenerator()
   m_LocalGenerators.clear();
 }
 
-
+  
 void cmGlobalGenerator::EnableLanguage(const char* lang, 
                                        cmMakefile *mf)
 {
@@ -116,7 +116,6 @@ void cmGlobalGenerator::EnableLanguage(const char* lang,
     systemFile += "/Modules/CMakeDetermineSystem.cmake";
     mf->ReadListFile(0, systemFile.c_str());
     }
-  
   // check for a C compiler and configure it
   if(!isLocal &&
      !this->GetLanguageEnabled("C") && 
@@ -137,20 +136,11 @@ void cmGlobalGenerator::EnableLanguage(const char* lang,
     this->SetLanguageEnabled("C");
     // put CC in the environment in case user scripts want
     // to run configure
-    // see man putenv for explaination of this stupid code...
     if(mf->GetDefinition("CMAKE_C_COMPILER"))
       { 
-      static char envCC[5000];
       std::string env = "CC=${CMAKE_C_COMPILER}";
       mf->ExpandVariablesInString(env);
-      unsigned int size = static_cast<unsigned int>(env.size());
-      if(size > 4999)
-        {
-        size = 4999;
-        }
-      strncpy(envCC, env.c_str(), size);
-      envCC[size] = 0;
-      putenv(envCC); 
+      cmSystemTools::PutEnv(env.c_str());
       }
     } 
   
@@ -166,20 +156,11 @@ void cmGlobalGenerator::EnableLanguage(const char* lang,
     this->SetLanguageEnabled("CXX");
     // put CXX in the environment in case user scripts want
     // to run configure
-    // see man putenv for explaination of this stupid code...
-    static char envCXX[5000];
     if(mf->GetDefinition("CMAKE_CXX_COMPILER"))
       {
       std::string env = "CXX=${CMAKE_CXX_COMPILER}";
       mf->ExpandVariablesInString(env); 
-      unsigned int size =  static_cast<unsigned int>(env.size());
-      if(size > 4999)
-        {
-        size = 4999;
-        }
-      strncpy(envCXX, env.c_str(), size);
-      envCXX[size] = 0;
-      putenv(envCXX);
+      cmSystemTools::PutEnv(env.c_str());
       }
     }
     // check for a Java compiler and configure it

Source/cmSystemTools.cxx

@@ -1177,3 +1177,27 @@ std::string cmSystemTools::RelativePath(const char* local, const char* remote)
   relativePath += relativeSplit[i];
   return relativePath;
 }
+class cmDeletingCharVector : public std::vector<char*>
+{
+public:
+  ~cmDeletingCharVector()
+    {
+      for(std::vector<char*>::iterator i = this->begin();
+          i != this->end(); ++i)
+        {
+        delete *i;
+        }
+    }
+};
+
+        
+bool cmSystemTools::PutEnv(const char* value)
+{ 
+  static cmDeletingCharVector localEnvironment;
+  char* envVar = new char[strlen(value)+1];
+  strcpy(envVar, value);
+  putenv(envVar);
+  // save the pointer in the static vector so that it can
+  // be deleted on exit
+  localEnvironment.push_back(envVar);
+}

Source/cmSystemTools.h

@@ -256,6 +256,10 @@ public:
   static std::string RelativePath(const char* local, const char* remote);
   ///! split a path by separator into an array of strings, default is /
   static std::vector<cmStdString> SplitString(const char* s, char separator = '/');
+  /** put a string into the environment
+      of the form var=value */
+  static bool PutEnv(const char* value);
+  
 private:
   static bool s_ForceUnixPaths;
   static bool s_RunCommandHideConsole;

Source/cmake.cxx

@@ -84,8 +84,7 @@ cmake::cmake()
   // encode the MAKEFLAGS variable in a strange way.
   if(getenv("MAKEFLAGS"))
     {
-    static char makeflags[] = "MAKEFLAGS=";
-    putenv(makeflags);
+    cmSystemTools::PutEnv("MAKEFLAGS=");
     }  
   
   m_Local = false;
@@ -876,36 +875,18 @@ void cmake::SetGlobalGenerator(cmGlobalGenerator *gg)
     delete m_GlobalGenerator;
     // restore the original environment variables CXX and CC
     // Restor CC
-    static char envCC[5000];
     std::string env = "CC=";
-    if(m_CCEnvironment)
+    if(m_CCEnvironment.size())
       {
       env += m_CCEnvironment;
       }
-    std::string::size_type size = env.size();
-    if(size > 4999)
-      {
-      size = 4999;
-      }
-    strncpy(envCC, env.c_str(), size);
-    envCC[size] = 0;
-    putenv(envCC); 
-    
-    // Restore CXX
-    static char envCXX[5000];
+    cmSystemTools::PutEnv(env.c_str());
     env = "CXX=";
-    if(m_CXXEnvironment)
+    if(m_CXXEnvironment.size())
       {
       env += m_CXXEnvironment;
       }
-    size = env.size();
-    if(size > 4999)
-      {
-      size = 4999;
-      }
-    strncpy(envCXX, env.c_str(), size);
-    envCXX[size] = 0;
-    putenv(envCXX);
+    cmSystemTools::PutEnv(env.c_str());
     }
 
   // set the new
@@ -915,9 +896,24 @@ void cmake::SetGlobalGenerator(cmGlobalGenerator *gg)
   // on windows.
   cmSystemTools::SetForceUnixPaths(m_GlobalGenerator->GetForceUnixPaths());
   // Save the environment variables CXX and CC
-  m_CXXEnvironment = getenv("CXX");
-  m_CCEnvironment = getenv("CC");    
-  
+  const char* cxx = getenv("CXX");
+  const char* cc = getenv("CC");
+  if(cxx)
+    {
+    m_CXXEnvironment = cxx;
+    }
+  else
+    {
+    m_CXXEnvironment = "";
+    }
+  if(cc)
+    {
+    m_CCEnvironment = cc;
+    }
+  else
+    {
+    m_CCEnvironment = "";
+    }
   // set the cmake instance just to be sure
   gg->SetCMakeInstance(this);
 }

Source/cmake.h

@@ -298,8 +298,8 @@ private:
   bool m_InTryCompile;
   bool m_ScriptMode;
   std::string m_CMakeCommand;
-  const char* m_CXXEnvironment;
-  const char* m_CCEnvironment;
+  std::string m_CXXEnvironment;
+  std::string m_CCEnvironment;
   bool m_DebugTryCompile;
 };