don't bother checking for stl namespace and use std

Because there are no compilers left that don't do std namespace.

CMakeLists.txt

@@ -332,10 +332,6 @@ else()
   set(HAVE_STD_ALIGN_VAL_T 0)
 endif()
 
-check_c_source_compiles(
-  "namespace abc { void foo() {} } int main() { abc::foo(); return 0; }"
-  HAVE_NAMESPACES)
-
 check_c_source_compiles("
   #include <unwind.h>
   int main()
@@ -470,22 +466,6 @@ check_cxx_source_compiles(
      int main() { pthread_t th; pthread_join(th, 0); return 0; }"
   have_pthread_despite_asking_for)
 
-check_cxx_source_compiles(
-  "#include <vector>
-     int main() { vector<int> t; return 0; }"
-  STL_NAMESPACE_NONE)
-if(STL_NAMESPACE_NONE)
-  set(STL_NAMESPACE "")
-else()
-  check_cxx_source_compiles(
-    "#include <vector>
-         int main() { std::vector<int> t; return 0; }"
-    STL_NAMESPACE_STD)
-  if (STL_NAMESPACE_STD)
-    set(STL_NAMESPACE "std")
-  endif()
-endif()
-
 check_variable_exists("program_invocation_name" HAVE_PROGRAM_INVOCATION_NAME)
 
 if(MINGW)

cmake/config.h.in

@@ -123,9 +123,6 @@
 /* Define to 1 if you have a working `mmap' system call. */
 #cmakedefine HAVE_MMAP
 
-/* define if the compiler implements namespaces */
-#cmakedefine HAVE_NAMESPACES
-
 /* Define to 1 if you have the <poll.h> header file. */
 #cmakedefine HAVE_POLL_H
 
@@ -293,9 +290,6 @@
 /* Define to 1 if you have the ANSI C header files. */
 #define STDC_HEADERS 1
 
-/* the namespace where STL code like vector<> is defined */
-#define STL_NAMESPACE @STL_NAMESPACE@
-
 /* Define 8 bytes of allocation alignment for tcmalloc */
 #cmakedefine TCMALLOC_ALIGN_8BYTES
 

configure.ac

@@ -544,9 +544,6 @@ AC_LANG_RESTORE
 
 AM_CONDITIONAL(HAVE_PTHREAD_DESPITE_ASKING_FOR, test x"$acx_pthread_despite_asking_for" = xyes)
 
-# Find out what namespace 'normal' STL code lives in
-AC_CXX_STL_NAMESPACE
-
 # Figure out where libc has program_invocation_name
 AC_PROGRAM_INVOCATION_NAME
 

src/heap-profiler.cc

@@ -82,8 +82,8 @@
 #endif
 #endif
 
-using STL_NAMESPACE::string;
-using STL_NAMESPACE::sort;
+using std::string;
+using std::sort;
 
 //----------------------------------------------------------------------
 // Flags that control heap-profiling

src/malloc_extension.cc

@@ -53,8 +53,8 @@
 #include "maybe_threads.h"
 #include "base/googleinit.h"
 
-using STL_NAMESPACE::string;
-using STL_NAMESPACE::vector;
+using std::string;
+using std::vector;
 
 static void DumpAddressMap(string* result) {
   *result += "\nMAPPED_LIBRARIES:\n";

src/tcmalloc.cc

@@ -142,10 +142,10 @@
 // Some windows file somewhere (at least on cygwin) #define's small (!)
 #undef small
 
-using STL_NAMESPACE::max;
-using STL_NAMESPACE::min;
-using STL_NAMESPACE::numeric_limits;
-using STL_NAMESPACE::vector;
+using std::max;
+using std::min;
+using std::numeric_limits;
+using std::vector;
 
 #include "libc_override.h"
 

src/windows/config.h

@@ -128,9 +128,6 @@
 /* Define to 1 if you have a working `mmap' system call. */
 /* #undef HAVE_MMAP */
 
-/* define if the compiler implements namespaces */
-#define HAVE_NAMESPACES 1
-
 /* Define to 1 if you have the <poll.h> header file. */
 /* #undef HAVE_POLL_H */
 
@@ -284,9 +281,6 @@
 /* Define to 1 if you have the ANSI C header files. */
 #define STDC_HEADERS 1
 
-/* the namespace where STL code like vector<> is defined */
-#define STL_NAMESPACE std
-
 /* Define 8 bytes of allocation alignment for tcmalloc */
 /* #undef TCMALLOC_ALIGN_8BYTES */