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diff --git a/include/__config b/include/__config
index 52bf12f..e431997 100644
--- a/include/__config
+++ b/include/__config
@@ -131,7 +131,12 @@
// Previously libc++ used "unsigned int" exclusively.
# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
// Unstable attempt to provide a more optimized std::function
+#ifdef __EMSCRIPTEN__
+// XXX EMSCRIPTEN https://github.com/emscripten-core/emscripten/issues/11022
+//# define _LIBCPP_ABI_OPTIMIZED_FUNCTION
+#else
# define _LIBCPP_ABI_OPTIMIZED_FUNCTION
+#endif
// All the regex constants must be distinct and nonzero.
# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
// Re-worked external template instantiations for std::string with a focus on
diff --git a/include/typeinfo b/include/typeinfo
index 59bc291..eb3dc59 100644
--- a/include/typeinfo
+++ b/include/typeinfo
@@ -104,6 +104,11 @@ public:
size_t hash_code() const _NOEXCEPT;
+#ifdef __EMSCRIPTEN__
+ // XXX Emscripten: adding `always_inline` fixes
+ // https://github.com/emscripten-core/emscripten/issues/13330
+ __attribute__((always_inline))
+#endif
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX23
bool operator==(const type_info& __arg) const _NOEXCEPT {
// When evaluated in a constant expression, both type infos simply can't come
diff --git a/src/filesystem/operations.cpp b/src/filesystem/operations.cpp
index 63a119a..61f2cc5 100644
--- a/src/filesystem/operations.cpp
+++ b/src/filesystem/operations.cpp
@@ -37,7 +37,7 @@
#include <time.h>
#include <fcntl.h> /* values for fchmodat */
-#if __has_include(<sys/sendfile.h>)
+#if __has_include(<sys/sendfile.h>) && !defined(__EMSCRIPTEN__)
# include <sys/sendfile.h>
# define _LIBCPP_FILESYSTEM_USE_SENDFILE
#elif defined(__APPLE__) || __has_include(<copyfile.h>)
diff --git a/src/new.cpp b/src/new.cpp
index c435c5f..6d5b221 100644
--- a/src/new.cpp
+++ b/src/new.cpp
@@ -37,8 +37,17 @@ operator new(std::size_t size) _THROW_BAD_ALLOC
else
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
throw std::bad_alloc();
+#else
+#ifdef __EMSCRIPTEN__
+ // Abort here so that when exceptions are disabled, we do not just
+ // return 0 when malloc returns 0.
+ // We could also do this with set_new_handler, but that adds a
+ // global constructor and a table entry, overhead that we can avoid
+ // by doing it this way.
+ abort();
#else
break;
+#endif
#endif
}
return p;
diff --git a/src/support/runtime/exception_fallback.ipp b/src/support/runtime/exception_fallback.ipp
index 3b2716d..c14c375 100644
--- a/src/support/runtime/exception_fallback.ipp
+++ b/src/support/runtime/exception_fallback.ipp
@@ -47,6 +47,7 @@ get_terminate() noexcept
return __libcpp_atomic_load(&__terminate_handler);
}
+#ifndef __EMSCRIPTEN__ // We provide this in JS
_LIBCPP_NORETURN
void
terminate() noexcept
@@ -69,7 +70,9 @@ terminate() noexcept
}
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
}
+#endif // !__EMSCRIPTEN__
+#if !defined(__EMSCRIPTEN__)
bool uncaught_exception() noexcept { return uncaught_exceptions() > 0; }
int uncaught_exceptions() noexcept
@@ -78,6 +81,7 @@ int uncaught_exceptions() noexcept
fprintf(stderr, "uncaught_exceptions not yet implemented\n");
::abort();
}
+#endif // !__EMSCRIPTEN__
exception::~exception() noexcept
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