Patch by Bruce Mitchener. Change all references to EMSCRIPTEN to __EMSCRIPTEN__. If you're not using the PP symbol EMSCRIPTEN, then you should see no functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@195136 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/__locale b/include/__locale
index 2073e1b..6d75162 100644
--- a/include/__locale
+++ b/include/__locale
@@ -23,9 +23,9 @@
 # include <support/win32/locale_win32.h>
 #elif _AIX
 # include <support/ibm/xlocale.h>
-#elif (defined(__GLIBC__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)) || defined(EMSCRIPTEN) || defined(__IBMCPP__)
+#elif (defined(__GLIBC__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)) || defined(__EMSCRIPTEN__) || defined(__IBMCPP__)
 # include <xlocale.h>
-#endif  // _WIN32 || __GLIBC__ || __APPLE__ || __FreeBSD__ || __sun__ || EMSCRIPTEN || __IBMCPP__
+#endif  // _WIN32 || __GLIBC__ || __APPLE__ || __FreeBSD__ || __sun__ || __EMSCRIPTEN__ || __IBMCPP__
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
@@ -341,12 +341,12 @@
     static const mask punct  = _PUNCT;
     static const mask xdigit = _HEX;
     static const mask blank  = _BLANK;
-#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
 #ifdef __APPLE__
     typedef __uint32_t mask;
 #elif defined(__FreeBSD__)
     typedef unsigned long mask;
-#elif defined(EMSCRIPTEN) ||  defined(__NetBSD__)
+#elif defined(__EMSCRIPTEN__) ||  defined(__NetBSD__)
     typedef unsigned short mask;
 #endif
     static const mask space  = _CTYPE_S;
@@ -375,7 +375,7 @@
     static const mask punct  = _ISPUNCT;
     static const mask xdigit = _ISXDIGIT;
     static const mask blank  = _ISBLANK;
-#else  // __GLIBC__ || _WIN32 || __APPLE__ || __FreeBSD__ || EMSCRIPTEN || __sun__
+#else  // __GLIBC__ || _WIN32 || __APPLE__ || __FreeBSD__ || __EMSCRIPTEN__ || __sun__
     typedef unsigned long mask;
     static const mask space  = 1<<0;
     static const mask print  = 1<<1;
@@ -598,7 +598,7 @@
 #endif
     _LIBCPP_ALWAYS_INLINE const mask* table() const  _NOEXCEPT {return __tab_;}
     static const mask* classic_table()  _NOEXCEPT;
-#if defined(__GLIBC__) || defined(EMSCRIPTEN)
+#if defined(__GLIBC__) || defined(__EMSCRIPTEN__)
     static const int* __classic_upper_table() _NOEXCEPT;
     static const int* __classic_lower_table() _NOEXCEPT;
 #endif
diff --git a/include/locale b/include/locale
index d13d49e..ac3ae7e 100644
--- a/include/locale
+++ b/include/locale
@@ -229,7 +229,7 @@
 // OSX has nice foo_l() functions that let you turn off use of the global
 // locale.  Linux, not so much.  The following functions avoid the locale when
 // that's possible and otherwise do the wrong thing.  FIXME.
-#if defined(__linux__) || defined(EMSCRIPTEN) || defined(_AIX)
+#if defined(__linux__) || defined(__EMSCRIPTEN__) || defined(_AIX)
 
 #ifdef _LIBCPP_LOCALE__L_EXTENSIONS
 decltype(MB_CUR_MAX_L(_VSTD::declval<locale_t>()))
diff --git a/src/exception.cpp b/src/exception.cpp
index 572d977..3ce6f2e 100644
--- a/src/exception.cpp
+++ b/src/exception.cpp
@@ -79,7 +79,7 @@
     return __sync_fetch_and_add(&__terminate_handler, (terminate_handler)0);
 }
 
-#ifndef EMSCRIPTEN // We provide this in JS
+#ifndef __EMSCRIPTEN__ // We provide this in JS
 _LIBCPP_NORETURN
 void
 terminate() _NOEXCEPT
@@ -102,10 +102,10 @@
     }
 #endif  // _LIBCPP_NO_EXCEPTIONS
 }
-#endif // !EMSCRIPTEN
+#endif // !__EMSCRIPTEN__
 #endif // !defined(LIBCXXRT) && !defined(_LIBCPPABI_VERSION)
 
-#if !defined(LIBCXXRT) && !defined(__GLIBCXX__) && !defined(EMSCRIPTEN)
+#if !defined(LIBCXXRT) && !defined(__GLIBCXX__) && !defined(__EMSCRIPTEN__)
 bool uncaught_exception() _NOEXCEPT
 {
 #if defined(__APPLE__) || defined(_LIBCPPABI_VERSION)
diff --git a/src/locale.cpp b/src/locale.cpp
index 8fadbb6..a326323 100644
--- a/src/locale.cpp
+++ b/src/locale.cpp
@@ -812,7 +812,7 @@
 {
 #ifdef _LIBCPP_HAS_DEFAULTRUNELOCALE
     return isascii(c) ? _DefaultRuneLocale.__mapupper[c] : c;
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
     return isascii(c) ? ctype<char>::__classic_upper_table()[c] : c;
 #else
     return (isascii(c) && iswlower_l(c, __cloc())) ? c-L'a'+L'A' : c;
@@ -825,7 +825,7 @@
     for (; low != high; ++low)
 #ifdef _LIBCPP_HAS_DEFAULTRUNELOCALE
         *low = isascii(*low) ? _DefaultRuneLocale.__mapupper[*low] : *low;
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
         *low = isascii(*low) ? ctype<char>::__classic_upper_table()[*low]
                              : *low;
 #else
@@ -839,7 +839,7 @@
 {
 #ifdef _LIBCPP_HAS_DEFAULTRUNELOCALE
     return isascii(c) ? _DefaultRuneLocale.__maplower[c] : c;
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
     return isascii(c) ? ctype<char>::__classic_lower_table()[c] : c;
 #else
     return (isascii(c) && isupper_l(c, __cloc())) ? c-L'A'+'a' : c;
@@ -852,7 +852,7 @@
     for (; low != high; ++low)
 #ifdef _LIBCPP_HAS_DEFAULTRUNELOCALE
         *low = isascii(*low) ? _DefaultRuneLocale.__maplower[*low] : *low;
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
         *low = isascii(*low) ? ctype<char>::__classic_lower_table()[*low]
                              : *low;
 #else
@@ -921,7 +921,7 @@
       static_cast<char>(_DefaultRuneLocale.__mapupper[static_cast<ptrdiff_t>(c)]) : c;
 #elif defined(__NetBSD__)
     return static_cast<char>(__classic_upper_table()[static_cast<unsigned char>(c)]);
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__)
     return isascii(c) ? 
       static_cast<char>(__classic_upper_table()[static_cast<unsigned char>(c)]) : c;
 #else
@@ -938,7 +938,7 @@
           static_cast<char>(_DefaultRuneLocale.__mapupper[static_cast<ptrdiff_t>(*low)]) : *low;
 #elif defined(__NetBSD__)
         *low = static_cast<char>(__classic_upper_table()[static_cast<unsigned char>(*low)]);
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__)
         *low = isascii(*low) ?
           static_cast<char>(__classic_upper_table()[static_cast<size_t>(*low)]) : *low;
 #else
@@ -955,7 +955,7 @@
       static_cast<char>(_DefaultRuneLocale.__maplower[static_cast<ptrdiff_t>(c)]) : c;
 #elif defined(__NetBSD__)
     return static_cast<char>(__classic_lower_table()[static_cast<unsigned char>(c)]);
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN) || defined(__NetBSD__)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
     return isascii(c) ?
       static_cast<char>(__classic_lower_table()[static_cast<size_t>(c)]) : c;
 #else
@@ -971,7 +971,7 @@
         *low = isascii(*low) ? static_cast<char>(_DefaultRuneLocale.__maplower[static_cast<ptrdiff_t>(*low)]) : *low;
 #elif defined(__NetBSD__)
         *low = static_cast<char>(__classic_lower_table()[static_cast<unsigned char>(*low)]);
-#elif defined(__GLIBC__) || defined(EMSCRIPTEN)
+#elif defined(__GLIBC__) || defined(__EMSCRIPTEN__)
         *low = isascii(*low) ? static_cast<char>(__classic_lower_table()[static_cast<size_t>(*low)]) : *low;
 #else
         *low = (isascii(*low) && isupper_l(*low, __cloc())) ? *low-'A'+'a' : *low;
@@ -1012,7 +1012,7 @@
     return low;
 }
 
-#ifdef EMSCRIPTEN
+#ifdef __EMSCRIPTEN__
 extern "C" const unsigned short ** __ctype_b_loc();
 extern "C" const int ** __ctype_tolower_loc();
 extern "C" const int ** __ctype_toupper_loc();
@@ -1033,7 +1033,7 @@
     return _ctype+1; // internal ctype mask table defined in msvcrt.dll
 // This is assumed to be safe, which is a nonsense assumption because we're
 // going to end up dereferencing it later...
-#elif defined(EMSCRIPTEN)
+#elif defined(__EMSCRIPTEN__)
     return *__ctype_b_loc();
 #elif defined(_AIX)
     return (const unsigned long *)__lc_ctype_ptr->obj->mask;
@@ -1072,7 +1072,7 @@
     return _C_toupper_tab_ + 1;
 }
 
-#elif defined(EMSCRIPTEN)
+#elif defined(__EMSCRIPTEN__)
 const int*
 ctype<char>::__classic_lower_table() _NOEXCEPT
 {
@@ -1084,7 +1084,7 @@
 {
     return *__ctype_toupper_loc();
 }
-#endif // __GLIBC__ || EMSCRIPTEN || __NETBSD__
+#endif // __GLIBC__ || __EMSCRIPTEN__ || __NETBSD__
 
 // template <> class ctype_byname<char>