[core] fix getenv namespace error with libc++

bindings/pyroot/cppyy/cppyy-backend/clingwrapper/src/clingwrapper.cxx

@@ -39,17 +39,17 @@
 #include "TThread.h"
 
 // Standard
-#include <assert.h>
+#include <cassert>
 #include <algorithm>     // for std::count, std::remove
 #include <climits>
 #include <stdexcept>
 #include <map>
 #include <new>
 #include <set>
 #include <sstream>
-#include <signal.h>
-#include <stdlib.h>      // for getenv
-#include <string.h>
+#include <csignal>
+#include <cstdlib>      // for getenv
+#include <cstring>
 #include <typeinfo>
 
 // temp
@@ -229,7 +229,7 @@ class TExceptionHandlerImp : public TExceptionHandler {
                 gInterpreter->ClearFileBusy();
             }
 
-            if (!getenv("CPPYY_CRASH_QUIET"))
+            if (!std::getenv("CPPYY_CRASH_QUIET"))
                 do_trace(sig);
 
         // jump back, if catch point set
@@ -263,7 +263,7 @@ class ApplicationStarter {
         g_globalidx[nullptr] = 0;
 
     // disable fast path if requested
-        if (getenv("CPPYY_DISABLE_FASTPATH")) gEnableFastPath = false;
+        if (std::getenv("CPPYY_DISABLE_FASTPATH")) gEnableFastPath = false;
 
     // fill the set of STL names
         const char* stl_names[] = {"allocator", "auto_ptr", "bad_alloc", "bad_cast",
@@ -296,7 +296,7 @@ class ApplicationStarter {
 
     // set opt level (default to 2 if not given; Cling itself defaults to 0)
         int optLevel = 2;
-        if (getenv("CPPYY_OPT_LEVEL")) optLevel = atoi(getenv("CPPYY_OPT_LEVEL"));
+        if (std::getenv("CPPYY_OPT_LEVEL")) optLevel = atoi(std::getenv("CPPYY_OPT_LEVEL"));
         if (optLevel != 0) {
             std::ostringstream s;
             s << "#pragma cling optimize " << optLevel;
@@ -324,7 +324,7 @@ class ApplicationStarter {
         gInterpreter->Declare("namespace __cppyy_internal { struct Sep; }");
 
     // retrieve all initial (ROOT) C++ names in the global scope to allow filtering later
-        if (!getenv("CPPYY_NO_ROOT_FILTER")) {
+        if (!std::getenv("CPPYY_NO_ROOT_FILTER")) {
             gROOT->GetListOfGlobals(true);             // force initialize
             gROOT->GetListOfGlobalFunctions(true);     // id.
             std::set<std::string> initial;

core/clingutils/src/TClingUtils.cxx

@@ -19,8 +19,8 @@
 #include <algorithm>
 #include <iostream>
 #include <sstream>
-#include <stdlib.h>
-#include <stdio.h>
+#include <cstdlib>
+#include <cstdio>
 #include <unordered_set>
 #include <cctype>
 
@@ -5188,7 +5188,7 @@ static void replaceEnvVars(const char* varname, std::string& txt)
          endVar = endVarName;
       }
 
-      const char* val = getenv(txt.substr(beginVarName,
+      const char* val = std::getenv(txt.substr(beginVarName,
                                           endVarName - beginVarName).c_str());
       if (!val) val = "";
 
@@ -5210,7 +5210,7 @@ static void replaceEnvVars(const char* varname, std::string& txt)
 
 void ROOT::TMetaUtils::SetPathsForRelocatability(std::vector<std::string>& clingArgs )
 {
-   const char* envInclPath = getenv("ROOT_INCLUDE_PATH");
+   const char* envInclPath = std::getenv("ROOT_INCLUDE_PATH");
 
    if (!envInclPath)
       return;

core/dictgen/src/rootcling_impl.cxx

@@ -2805,11 +2805,11 @@ void CreateDictHeader(std::ostream &dictStream, const std::string &main_dictname
                // write one and include in there a few things for backward
                // compatibility.
                << "\n/*******************************************************************/\n"
-               << "#include <stddef.h>\n"
-               << "#include <stdio.h>\n"
-               << "#include <stdlib.h>\n"
-               << "#include <string.h>\n"
-               << "#include <assert.h>\n"
+               << "#include <cstddef>\n"
+               << "#include <cstdio>\n"
+               << "#include <cstdlib>\n"
+               << "#include <cstring>\n"
+               << "#include <cassert>\n"
                << "#define G__DICTIONARY\n"
                << "#include \"ROOT/RConfig.hxx\"\n"
                << "#include \"TClass.h\"\n"
@@ -3661,7 +3661,7 @@ static void MaybeSuppressWin32CrashDialogs() {
    // Suppress error dialogs to avoid hangs on build nodes.
    // One can use an environment variable (Cling_GuiOnAssert) to enable
    // the error dialogs.
-   const char *EnablePopups = getenv("Cling_GuiOnAssert");
+   const char *EnablePopups = std::getenv("Cling_GuiOnAssert");
    if (EnablePopups == nullptr || EnablePopups[0] == '0') {
       ::_set_error_mode(_OUT_TO_STDERR);
       _CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
@@ -6018,7 +6018,7 @@ int GenReflexMain(int argc, char **argv)
    //std::string verbosityOption("-v4"); // To be uncommented for the testing phase. It should be -v
    std::string verbosityOption("-v2");
    if (options[SILENT]) verbosityOption = "-v0";
-   if (options[VERBOSE] || getenv ("VERBOSE")) verbosityOption = "-v3";
+   if (options[VERBOSE] || std::getenv ("VERBOSE")) verbosityOption = "-v3";
    if (options[DEBUG]) verbosityOption = "-v4";
 
    genreflex::verbose = verbosityOption == "-v4";

core/foundation/src/FoundationUtils.cxx

@@ -22,9 +22,10 @@
 
 #include <algorithm>
 #include <cassert>
+#include <cstdlib>
 
-#include <errno.h>
-#include <string.h>
+#include <cerrno>
+#include <cstring>
 
 #ifdef _WIN32
 #include <direct.h>
@@ -150,7 +151,7 @@ const std::string& GetFallbackRootSys() {
 
 #ifdef ROOTPREFIX
 static bool IgnorePrefix() {
-   static bool ignorePrefix = ::getenv("ROOTIGNOREPREFIX");
+   static bool ignorePrefix = std::getenv("ROOTIGNOREPREFIX");
    return ignorePrefix;
 }
 #endif
@@ -164,7 +165,7 @@ const std::string& GetRootSys() {
 #endif
    static std::string rootsys;
    if (rootsys.empty()) {
-      if (const char* envValue = ::getenv("ROOTSYS")) {
+      if (const char* envValue = std::getenv("ROOTSYS")) {
          rootsys = envValue;
          // We cannot use gSystem->UnixPathName.
          ConvertToUnixPath(rootsys);

core/metacling/src/TCling.cxx

@@ -3547,7 +3547,7 @@ void TCling::RegisterLoadedSharedLibrary(const char* filename)
    // Check that this is not a system library
    static const int bufsize = 260;
    char posixwindir[bufsize];
-   char *windir = getenv("WINDIR");
+   char *windir = std::getenv("WINDIR");
    if (windir)
       cygwin_conv_path(CCP_WIN_A_TO_POSIX, windir, posixwindir, bufsize);
    else

core/rootcling_stage1/src/rootcling_stage1.cxx

@@ -24,15 +24,15 @@ static void (*dlsymaddr)() = &usedToIdentifyRootClingByDlSym;
 ROOT::Internal::RootCling::TROOTSYSSetter gROOTSYSSetter;
 
 static const char *GetIncludeDir() {
-   auto renv = getenv("ROOTSYS");
+   auto renv = std::getenv("ROOTSYS");
    if (!renv)
       return nullptr;
    static std::string incdir = std::string(renv) + "/include";
    return incdir.c_str();
 }
 
 static const char *GetEtcDir() {
-   auto renv = getenv("ROOTSYS");
+   auto renv = std::getenv("ROOTSYS");
    if (!renv)
       return nullptr;
    static std::string etcdir = std::string(renv) + "/etc";

core/textinput/src/textinput/TerminalDisplayUnix.cpp

@@ -18,9 +18,9 @@
 #include "textinput/TerminalDisplayUnix.h"
 
 #include <fcntl.h>
-#include <stdio.h>
+#include <cstdio>
 // putenv not in cstdlib on Solaris
-#include <stdlib.h>
+#include <cstdlib>
 #include <unistd.h>
 #include <sys/ioctl.h>
 #include <termios.h>
@@ -118,7 +118,7 @@ namespace textinput {
     TerminalConfigUnix::Get().TIOS()->c_lflag &= ~(ECHO);
     TerminalConfigUnix::Get().TIOS()->c_lflag |= ECHOCTL|ECHOKE|ECHOE;
 #endif
-    const char* TERM = getenv("TERM");
+    const char* TERM = std::getenv("TERM");
     if (TERM &&  strstr(TERM, "256")) {
       fNColors = 256;
     }
@@ -153,7 +153,7 @@ namespace textinput {
     }
 #else
     // try $COLUMNS
-    const char* COLUMNS = getenv("COLUMNS");
+    const char* COLUMNS = std::getenv("COLUMNS");
     if (COLUMNS) {
       long width = atol(COLUMNS);
       if (width > 4 && width < 1024*16) {

core/unix/src/TUnixSystem.cxx

@@ -46,7 +46,7 @@
 //#define G__OLDEXPAND
 
 #include <unistd.h>
-#include <stdlib.h>
+#include <cstdlib>
 #include <sys/types.h>
 #if defined(R__SUN) || defined(R__AIX) || \
     defined(R__LINUX) || defined(R__SOLARIS) || \
@@ -704,7 +704,7 @@ void TUnixSystem::SetDisplay()
          }
       }
 #ifndef R__HAS_COCOA
-      if (!gROOT->IsBatch() && !getenv("DISPLAY")) {
+      if (!gROOT->IsBatch() && !std::getenv("DISPLAY")) {
          Error("SetDisplay", "Can't figure out DISPLAY, set it manually\n"
             "In case you run a remote ssh session, restart your ssh session with:\n"
             "=========>  ssh -Y");
@@ -2139,7 +2139,7 @@ void TUnixSystem::Setenv(const char *name, const char *value)
 
 const char *TUnixSystem::Getenv(const char *name)
 {
-   return ::getenv(name);
+   return std::getenv(name);
 }
 
 ////////////////////////////////////////////////////////////////////////////////

core/winnt/src/TWinNTSystem.cxx

@@ -50,9 +50,9 @@
 #include <ctype.h>
 #include <float.h>
 #include <sys/stat.h>
-#include <signal.h>
-#include <stdio.h>
-#include <errno.h>
+#include <csignal>
+#include <cstdio>
+#include <cerrno>
 #include <lm.h>
 #include <dbghelp.h>
 #include <Tlhelp32.h>
@@ -61,7 +61,7 @@
 #include <list>
 #include <shlobj.h>
 #include <conio.h>
-#include <time.h>
+#include <ctime>
 #include <bcrypt.h>
 #include <chrono>
 #include <thread>
@@ -827,7 +827,7 @@ namespace {
       // determine the fileopen.C file path:
       TString fileopen = "fileopen.C";
       TString rootmacrodir = "macros";
-      sys->PrependPathName(getenv("ROOTSYS"), rootmacrodir);
+      sys->PrependPathName(std::getenv("ROOTSYS"), rootmacrodir);
       sys->PrependPathName(rootmacrodir.Data(), fileopen);
 
       if (regROOTwrite) {
@@ -1283,7 +1283,7 @@ Int_t TWinNTSystem::GetCryptoRandom(void *buf, Int_t len)
 const char *TWinNTSystem::HostName()
 {
    if (fHostname == "")
-      fHostname = ::getenv("COMPUTERNAME");
+      fHostname = std::getenv("COMPUTERNAME");
    if (fHostname == "") {
       // This requires a DNS query - but we need it for fallback
       char hn[64];
@@ -2225,23 +2225,23 @@ std::string TWinNTSystem::GetHomeDirectory(const char *userName) const
 void TWinNTSystem::FillWithHomeDirectory(const char *userName, char *mydir) const
 {
    const char *h = nullptr;
-   if (!(h = ::getenv("home"))) h = ::getenv("HOME");
+   if (!(h = std::getenv("home"))) h = std::getenv("HOME");
 
    if (h) {
       strlcpy(mydir, h,kMAXPATHLEN);
    } else {
       // for Windows NT HOME might be defined as either $(HOMESHARE)/$(HOMEPATH)
       //                                         or     $(HOMEDRIVE)/$(HOMEPATH)
-      h = ::getenv("HOMESHARE");
-      if (!h)  h = ::getenv("HOMEDRIVE");
+      h = std::getenv("HOMESHARE");
+      if (!h)  h = std::getenv("HOMEDRIVE");
       if (h) {
          strlcpy(mydir, h,kMAXPATHLEN);
-         h = ::getenv("HOMEPATH");
+         h = std::getenv("HOMEPATH");
          if(h) strlcat(mydir, h,kMAXPATHLEN);
       }
       // on Windows Vista HOME is usually defined as $(USERPROFILE)
       if (!h) {
-         h = ::getenv("USERPROFILE");
+         h = std::getenv("USERPROFILE");
          if (h) strlcpy(mydir, h,kMAXPATHLEN);
       }
    }
@@ -3861,7 +3861,7 @@ void TWinNTSystem::Setenv(const char *name, const char *value)
 
 const char *TWinNTSystem::Getenv(const char *name)
 {
-   const char *env = ::getenv(name);
+   const char *env = std::getenv(name);
    if (!env) {
       if (::_stricmp(name,"home") == 0 ) {
         env = HomeDirectory();

documentation/doxygen/filter.cxx

@@ -85,8 +85,8 @@
 #include <cstring>
 #include <iostream>
 #include <fstream>
-#include <stdlib.h>
-#include <stdarg.h>
+#include <cstdlib>
+#include <cstdarg>
 #include <memory>
 
 using std::string;
@@ -161,15 +161,15 @@ int main(int argc, char *argv[])
    gCwd     = gFileName.substr(0,last);
 
    // Retrieve the output directory
-   gOutDir = getenv("DOXYGEN_OUTPUT_DIRECTORY");
+   gOutDir = std::getenv("DOXYGEN_OUTPUT_DIRECTORY");
    ReplaceAll(gOutDir,"\"","");
 
    // Retrieve the source directory
-   gSourceDir = getenv("DOXYGEN_SOURCE_DIRECTORY");
+   gSourceDir = std::getenv("DOXYGEN_SOURCE_DIRECTORY");
    ReplaceAll(gSourceDir,"\"","");
 
    // Retrieve the python executable
-   gPythonExec = getenv("Python3_EXECUTABLE");
+   gPythonExec = std::getenv("Python3_EXECUTABLE");
    ReplaceAll(gPythonExec,"\"","");
 
    // Open the input file name.

interpreter/cling/lib/Interpreter/CIFactory.cpp

@@ -786,7 +786,7 @@ namespace {
     clang::HeaderSearchOptions& HSOpts = CI.getHeaderSearchOpts();
     // Register prebuilt module paths where we will lookup module files.
     addPrebuiltModulePaths(HSOpts,
-                           getPathsFromEnv(getenv("CLING_PREBUILT_MODULE_PATH")));
+                           getPathsFromEnv(std::getenv("CLING_PREBUILT_MODULE_PATH")));
 
     // Register all modulemaps necessary for cling to run. If we have specified
     // -fno-implicit-module-maps then we have to add them explicitly to the list

interpreter/cling/lib/Interpreter/DynamicLibraryManager.cpp

@@ -47,7 +47,7 @@ namespace cling {
     // Behaviour is to not add paths that don't exist...In an interpreted env
     // does this make sense? Path could pop into existance at any time.
     for (const char* Var : kSysLibraryEnv) {
-      if (const char* Env = ::getenv(Var)) {
+      if (const char* Env = std::getenv(Var)) {
         llvm::SmallVector<llvm::StringRef, 10> CurPaths;
         SplitPaths(Env, CurPaths, utils::kPruneNonExistant, platform::kEnvDelim);
         for (const auto& Path : CurPaths)

interpreter/cling/lib/UserInterface/UserInterface.cpp

@@ -69,7 +69,7 @@ namespace {
   };
 
   llvm::SmallString<512> GetHistoryFilePath() {
-    if (getenv("CLING_NOHISTORY")) {
+    if (std::getenv("CLING_NOHISTORY")) {
       return {};
     }
 

interpreter/cling/lib/Utils/Paths.cpp

@@ -39,7 +39,7 @@ bool ExpandEnvVars(std::string& Str, bool Path) {
 
     std::string EnvVar = Str.substr(DPos + 1, Length -1); //"HOME"
     std::string FullPath;
-    if (const char* Tok = ::getenv(EnvVar.c_str()))
+    if (const char* Tok = std::getenv(EnvVar.c_str()))
       FullPath = Tok;
 
     Str.replace(DPos, Length, FullPath);