Fixes glibc++ 5 checking (open-telemetry#3355)

* Fixes glibc++ 5 checking

* Always checking `OPENTELEMETRY_TRIVIALITY_TYPE_TRAITS` when `OPENTELEMETRY_STL_VERSION` is defined

* Restore confg.h but left a warning

Author: owent

api/include/opentelemetry/config.h

@@ -3,12 +3,17 @@
 
 #pragma once
 
-#ifndef __has_include
-#  define OPENTELEMETRY_HAS_INCLUDE(x) 0
-#else
-#  define OPENTELEMETRY_HAS_INCLUDE(x) __has_include(x)
-#endif
+#include <type_traits>  // IWYU pragma: keep
 
-#if !defined(__GLIBCXX__) || OPENTELEMETRY_HAS_INCLUDE(<codecvt>)  // >= libstdc++-5
-#  define OPENTELEMETRY_TRIVIALITY_TYPE_TRAITS
+#if defined(OPENTELEMETRY_ABI_VERSION_NO) && OPENTELEMETRY_ABI_VERSION_NO >= 2
+#  error \
+      "opentelemetry/config.h is removed in ABI version 2 and later. Please use opentelemetry/version.h instead."
+#else
+#  if defined(__clang__) || defined(__GNUC__)
+#    pragma GCC warning \
+        "opentelemetry/config.h is deprecated. Please use opentelemetry/version.h instead."
+#  elif defined(_MSC_VER)
+#    pragma message( \
+        "[WARNING]: opentelemetry/config.h is deprecated. Please use opentelemetry/version.h instead.")
+#  endif
 #endif

api/include/opentelemetry/nostd/type_traits.h

@@ -10,15 +10,20 @@
 #  endif
 #endif
 
+#include <type_traits>
+
 #if !defined(OPENTELEMETRY_HAVE_STD_TYPE_TRAITS)
 #  include <array>
-#  include <type_traits>
 
-#  include "opentelemetry/config.h"
 #  include "opentelemetry/nostd/detail/void.h"  // IWYU pragma: export
 #  include "opentelemetry/version.h"
 #endif
 
+#if !defined(__GLIBCXX__) || (defined(_GLIBCXX_RELEASE) && _GLIBCXX_RELEASE >= 7) || \
+    (defined(__GLIBCXX__) && __GLIBCXX__ >= 20150422)  // >= libstdc++-5
+#  define OPENTELEMETRY_TRIVIALITY_TYPE_TRAITS
+#endif
+
 OPENTELEMETRY_BEGIN_NAMESPACE
 namespace nostd
 {

sdk/include/opentelemetry/sdk_config.h

@@ -3,5 +3,4 @@
 
 #pragma once
 
-#include "opentelemetry/config.h"
 #include "opentelemetry/sdk/common/global_log_handler.h"