Create an emscripten-specific platform errors.h

Author: google-yfyang

libc/src/__support/StringUtil/platform_errors.h

@@ -9,8 +9,10 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_PLATFORM_ERRORS_H
 #define LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_PLATFORM_ERRORS_H
 
-#if defined(__linux__) || defined(__Fuchsia__) || defined(__EMSCRIPTEN__)
+#if defined(__linux__) || defined(__Fuchsia__)
 #include "tables/linux_platform_errors.h"
+#elif defined(__EMSCRIPTEN__)
+#include "tables/emscripten_platform_errors.h"
 #else
 #include "tables/minimal_platform_errors.h"
 #endif

libc/src/__support/StringUtil/tables/emscripten_platform_errors.h

@@ -0,0 +1,26 @@
+//===-- Map of error numbers to strings for the Emscripten platform --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_TABLES_EMSCRPITEN_PLATFORM_ERRORS_H
+#define LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_TABLES_EMSCRPITEN_PLATFORM_ERRORS_H
+
+#include "posix_errors.h"
+#include "src/__support/macros/config.h"
+#include "stdc_errors.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LIBC_INLINE_VAR constexpr auto PLATFORM_ERRORS =
+    STDC_ERRORS + POSIX_ERRORS;
+
+LIBC_INLINE_VAR constexpr auto PLATFORM_ERRNO_NAMES =
+    STDC_ERRNO_NAMES + POSIX_ERRNO_NAMES;
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_TABLES_EMSCRPITEN_PLATFORM_ERRORS_H

libc/src/setjmp/wasm/sigsetjmp.cpp

@@ -1,3 +1,11 @@
+//===-- Implementation of sigsetjmp ---------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #include "src/setjmp/sigsetjmp.h"
 #include "hdr/offsetof_macros.h"
 #include "src/__support/common.h"