Add m-esr52 at 52.6.0

1 files changed, 113 insertions, 0 deletions

diff --git a/mfbt/Compiler.h b/mfbt/Compiler.h
new file mode 100644
index 000000000..1bd34d329
--- /dev/null
+++ b/mfbt/Compiler.h
@@ -0,0 +1,113 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Various compiler checks. */
+
+#ifndef mozilla_Compiler_h
+#define mozilla_Compiler_h
+
+#define MOZ_IS_GCC 0
+#define MOZ_IS_MSVC 0
+
+#if !defined(__clang__) && defined(__GNUC__)
+
+#  undef MOZ_IS_GCC
+#  define MOZ_IS_GCC 1
+   /*
+    * These macros should simplify gcc version checking. For example, to check
+    * for gcc 4.7.1 or later, check `#if MOZ_GCC_VERSION_AT_LEAST(4, 7, 1)`.
+    */
+#  define MOZ_GCC_VERSION_AT_LEAST(major, minor, patchlevel)          \
+     ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) \
+      >= ((major) * 10000 + (minor) * 100 + (patchlevel)))
+#  define MOZ_GCC_VERSION_AT_MOST(major, minor, patchlevel)           \
+     ((__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) \
+      <= ((major) * 10000 + (minor) * 100 + (patchlevel)))
+#  if !MOZ_GCC_VERSION_AT_LEAST(4, 8, 0)
+#    error "mfbt (and Gecko) require at least gcc 4.8 to build."
+#  endif
+
+#elif defined(_MSC_VER)
+
+#  undef MOZ_IS_MSVC
+#  define MOZ_IS_MSVC 1
+
+#endif
+
+/*
+ * The situation with standard libraries is a lot worse than with compilers,
+ * particularly as clang and gcc could end up using one of three or so standard
+ * libraries, and they may not be up-to-snuff with newer C++11 versions. To
+ * detect the library, we're going to include cstddef (which is a small header
+ * which will be transitively included by everybody else at some point) to grab
+ * the version macros and deduce macros from there.
+ */
+#ifdef __cplusplus
+#  include <cstddef>
+#  ifdef _STLPORT_MAJOR
+#    define MOZ_USING_STLPORT 1
+#    define MOZ_STLPORT_VERSION_AT_LEAST(major, minor, patch) \
+       (_STLPORT_VERSION >= ((major) << 8 | (minor) << 4 | (patch)))
+#  elif defined(_LIBCPP_VERSION)
+   /*
+    * libc++, unfortunately, doesn't appear to have useful versioning macros.
+    * Hopefully, the recommendations of N3694 with respect to standard libraries
+    * will get applied instead and we won't need to worry about version numbers
+    * here.
+    */
+#    define MOZ_USING_LIBCXX 1
+#  elif defined(__GLIBCXX__)
+#    define MOZ_USING_LIBSTDCXX 1
+   /*
+    * libstdc++ is also annoying and doesn't give us useful versioning macros
+    * for the library. If we're using gcc, then assume that libstdc++ matches
+    * the compiler version. If we're using clang, we're going to have to fake
+    * major/minor combinations by looking for newly-defined config macros.
+    */
+#    if MOZ_IS_GCC
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          MOZ_GCC_VERSION_AT_LEAST(major, minor, patch)
+#    elif defined(_GLIBCXX_THROW_OR_ABORT)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 8))
+#    elif defined(_GLIBCXX_NOEXCEPT)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 7))
+#    elif defined(_GLIBCXX_USE_DEPRECATED)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 6))
+#    elif defined(_GLIBCXX_PSEUDO_VISIBILITY)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 5))
+#    elif defined(_GLIBCXX_BEGIN_EXTERN_C)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 4))
+#    elif defined(_GLIBCXX_VISIBILITY_ATTR)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 3))
+#    elif defined(_GLIBCXX_VISIBILITY)
+#      define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) \
+          ((major) < 4 || ((major) == 4 && (minor) <= 2))
+#    else
+#      error "Your version of libstdc++ is unknown to us and is likely too old."
+#    endif
+#  endif
+
+   // Flesh out the defines for everyone else
+#  ifndef MOZ_USING_STLPORT
+#    define MOZ_USING_STLPORT 0
+#    define MOZ_STLPORT_VERSION_AT_LEAST(major, minor, patch) 0
+#  endif
+#  ifndef MOZ_USING_LIBCXX
+#    define MOZ_USING_LIBCXX 0
+#  endif
+#  ifndef MOZ_USING_LIBSTDCXX
+#    define MOZ_USING_LIBSTDCXX 0
+#    define MOZ_LIBSTDCXX_VERSION_AT_LEAST(major, minor, patch) 0
+#  endif
+#endif /* __cplusplus */
+
+#endif /* mozilla_Compiler_h */