[libcxx] r320925 - [libcxx] Add WebAssembly support

[Sam Clegg via cfe-commits]

Author: sbc
Date: Sat Dec 16 10:59:50 2017
New Revision: 320925

URL: http://llvm.org/viewvc/llvm-project?rev=320925&view=rev
Log:
[libcxx] Add WebAssembly support

It turns out that this is the only change required in libcxx
for it to compile with the new `wasm32-unknown-unknown-wasm`
target recently added to Clang.

Patch by Nicholas Wilson!

Differential Revision: https://reviews.llvm.org/D41073

Modified:
    libcxx/trunk/include/__config
    libcxx/trunk/src/include/config_elast.h

Modified: libcxx/trunk/include/__config
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/__config?rev=320925&r1=320924&r2=320925&view=diff
==============================================================================
--- libcxx/trunk/include/__config (original)
+++ libcxx/trunk/include/__config Sat Dec 16 10:59:50 2017
@@ -45,6 +45,8 @@
 #define _LIBCPP_OBJECT_FORMAT_MACHO 1
 #elif defined(_WIN32)
 #define _LIBCPP_OBJECT_FORMAT_COFF  1
+#elif defined(__wasm__)
+#define _LIBCPP_OBJECT_FORMAT_WASM  1
 #else
 #error Unknown object file format
 #endif

Modified: libcxx/trunk/src/include/config_elast.h
URL: http://llvm.org/viewvc/llvm-project/libcxx/trunk/src/include/config_elast.h?rev=320925&r1=320924&r2=320925&view=diff
==============================================================================
--- libcxx/trunk/src/include/config_elast.h (original)
+++ libcxx/trunk/src/include/config_elast.h Sat Dec 16 10:59:50 2017
@@ -24,7 +24,7 @@
 #define _LIBCPP_ELAST __ELASTERROR
 #elif defined(__Fuchsia__)
 // No _LIBCPP_ELAST needed on Fuchsia
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(_LIBCPP_HAS_MUSL_LIBC)
 #define _LIBCPP_ELAST 4095
 #elif defined(__APPLE__)
 // No _LIBCPP_ELAST needed on Apple