Remove emscripten specific error messages

Author: google-yfyang

libc/src/__support/StringUtil/platform_errors.h

@@ -9,10 +9,8 @@
 #ifndef LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_PLATFORM_ERRORS_H
 #define LLVM_LIBC_SRC___SUPPORT_STRINGUTIL_PLATFORM_ERRORS_H
 
-#if defined(__linux__) || defined(__Fuchsia__)
+#if defined(__linux__) || defined(__Fuchsia__) || defined(__EMSCRIPTEN__)
 #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

@@ -63,12 +63,7 @@ LIBC_INLINE_VAR constexpr MsgTable<76> POSIX_ERRORS = {
     MsgMapping(EPROTO, "Protocol error"),
     MsgMapping(EMULTIHOP, "Multihop attempted"),
     MsgMapping(EBADMSG, "Bad message"),
-#ifdef __EMSCRIPTEN__
-    // For now, match the musl string
-    MsgMapping(EOVERFLOW, "Value too large for data type"),
-#else
     MsgMapping(EOVERFLOW, "Value too large for defined data type"),
-#endif
     MsgMapping(ENOTSOCK, "Socket operation on non-socket"),
     MsgMapping(EDESTADDRREQ, "Destination address required"),
     MsgMapping(EMSGSIZE, "Message too long"),

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

@@ -16,12 +16,7 @@
 namespace LIBC_NAMESPACE_DECL {
 
 LIBC_INLINE_VAR constexpr const MsgTable<4> STDC_ERRORS = {
-#ifdef __EMSCRIPTEN__
-    // For now, match the musl name for errno 0.
-    MsgMapping(0, "No error information"),
-#else
     MsgMapping(0, "Success"),
-#endif
     MsgMapping(EDOM, "Numerical argument out of domain"),
     MsgMapping(ERANGE, "Numerical result out of range"),
     MsgMapping(EILSEQ, "Invalid or incomplete multibyte or wide character"),

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

@@ -9,14 +9,9 @@
 #include "src/setjmp/sigsetjmp.h"
 #include "hdr/offsetof_macros.h"
 #include "src/__support/common.h"
-#include "src/__support/macros/config.h"
-
-#if !defined(LIBC_TARGET_ARCH_IS_WASM)
-#error "Invalid file include"
-#endif
 
 namespace LIBC_NAMESPACE_DECL {
-[[gnu::returns_twice]] int sigsetjmp(jmp_buf sigjmp_buf, int savesigs) {
-    return setjmp(sigjmp_buf);
-}
+[[gnu::returns_twice]] int sigsetjmp(jmp_buf sigjmp_buf, int _) {
+  return setjmp(sigjmp_buf);
 }
+} // namespace LIBC_NAMESPACE_DECL