diff --git a/gen/cmd/src/app.rs b/gen/cmd/src/app.rs
index 97288c105..824864c74 100644
--- a/gen/cmd/src/app.rs
+++ b/gen/cmd/src/app.rs
@@ -133,7 +133,15 @@ Optional annotation for implementations of C++ function wrappers
 that may be exposed to Rust. You may for example need to provide
 __declspec(dllexport) or __attribute__((visibility(\"default\")))
 if Rust code from one shared object or executable depends on
-these C++ functions in another.";
+these C++ functions in another.
+
+If you need to use this option, you might also consider similarly
+defining either or both of the preprocessor symbols CXX_RS_EXPORT
+and CXX_CPP_EXPORT when compiling cxx.cc. CXX_RS_EXPORT
+attaches to symbols exported from cxx.cc which are typically used
+by Rust code; CXX_CPP_EXPORT attaches to symbols which are used
+by C++ code.
+";
     Arg::new(CXX_IMPL_ANNOTATIONS)
         .long(CXX_IMPL_ANNOTATIONS)
         .takes_value(true)
diff --git a/gen/cmd/src/test.rs b/gen/cmd/src/test.rs
index 33a61fdf6..3fe4fd370 100644
--- a/gen/cmd/src/test.rs
+++ b/gen/cmd/src/test.rs
@@ -23,6 +23,13 @@ OPTIONS:
             __declspec(dllexport) or __attribute__((visibility(\"default\")))
             if Rust code from one shared object or executable depends on
             these C++ functions in another.
+            
+            If you need to use this option, you might also consider similarly
+            defining either or both of the preprocessor symbols CXX_RS_EXPORT
+            and CXX_CPP_EXPORT when compiling cxx.cc. CXX_RS_EXPORT
+            attaches to symbols exported from cxx.cc which are typically used
+            by Rust code; CXX_CPP_EXPORT attaches to symbols which are used
+            by C++ code.
 
     -h, --help
             Print help information.
diff --git a/src/cxx.cc b/src/cxx.cc
index 1601a05ab..518513f15 100644
--- a/src/cxx.cc
+++ b/src/cxx.cc
@@ -3,71 +3,93 @@
 #include <iostream>
 #include <memory>
 
+#ifndef CXX_RS_EXPORT
+#define CXX_RS_EXPORT
+#endif
+#ifndef CXX_CPP_EXPORT
+#define CXX_CPP_EXPORT
+#endif
+
 extern "C" {
-void cxxbridge1$cxx_string$init(std::string *s, const std::uint8_t *ptr,
-                                std::size_t len) noexcept {
+CXX_RS_EXPORT void cxxbridge1$cxx_string$init(std::string *s,
+                                              const std::uint8_t *ptr,
+                                              std::size_t len) noexcept {
   new (s) std::string(reinterpret_cast<const char *>(ptr), len);
 }
 
-void cxxbridge1$cxx_string$destroy(std::string *s) noexcept {
+CXX_RS_EXPORT void cxxbridge1$cxx_string$destroy(std::string *s) noexcept {
   using std::string;
   s->~string();
 }
 
-const char *cxxbridge1$cxx_string$data(const std::string &s) noexcept {
+CXX_RS_EXPORT const char *
+cxxbridge1$cxx_string$data(const std::string &s) noexcept {
   return s.data();
 }
 
-std::size_t cxxbridge1$cxx_string$length(const std::string &s) noexcept {
+CXX_RS_EXPORT std::size_t
+cxxbridge1$cxx_string$length(const std::string &s) noexcept {
   return s.length();
 }
 
-void cxxbridge1$cxx_string$clear(std::string &s) noexcept { s.clear(); }
+CXX_RS_EXPORT void cxxbridge1$cxx_string$clear(std::string &s) noexcept {
+  s.clear();
+}
 
-void cxxbridge1$cxx_string$reserve_total(std::string &s,
-                                         size_t new_cap) noexcept {
+CXX_RS_EXPORT void
+cxxbridge1$cxx_string$reserve_total(std::string &s, size_t new_cap) noexcept {
   s.reserve(new_cap);
 }
 
-void cxxbridge1$cxx_string$push(std::string &s, const std::uint8_t *ptr,
-                                std::size_t len) noexcept {
+CXX_RS_EXPORT void cxxbridge1$cxx_string$push(std::string &s,
+                                              const std::uint8_t *ptr,
+                                              std::size_t len) noexcept {
   s.append(reinterpret_cast<const char *>(ptr), len);
 }
 
 // rust::String
-void cxxbridge1$string$new(rust::String *self) noexcept;
-void cxxbridge1$string$clone(rust::String *self,
-                             const rust::String &other) noexcept;
-bool cxxbridge1$string$from_utf8(rust::String *self, const char *ptr,
-                                 std::size_t len) noexcept;
-void cxxbridge1$string$from_utf8_lossy(rust::String *self, const char *ptr,
-                                       std::size_t len) noexcept;
-bool cxxbridge1$string$from_utf16(rust::String *self, const char16_t *ptr,
-                                  std::size_t len) noexcept;
-void cxxbridge1$string$from_utf16_lossy(rust::String *self, const char16_t *ptr,
-                                        std::size_t len) noexcept;
-void cxxbridge1$string$drop(rust::String *self) noexcept;
-const char *cxxbridge1$string$ptr(const rust::String *self) noexcept;
-std::size_t cxxbridge1$string$len(const rust::String *self) noexcept;
-std::size_t cxxbridge1$string$capacity(const rust::String *self) noexcept;
-void cxxbridge1$string$reserve_additional(rust::String *self,
-                                          size_t additional) noexcept;
-void cxxbridge1$string$reserve_total(rust::String *self,
-                                     size_t new_cap) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$new(rust::String *self) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$clone(rust::String *self,
+                                           const rust::String &other) noexcept;
+CXX_RS_EXPORT bool cxxbridge1$string$from_utf8(rust::String *self,
+                                               const char *ptr,
+                                               std::size_t len) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$from_utf8_lossy(rust::String *self,
+                                                     const char *ptr,
+                                                     std::size_t len) noexcept;
+CXX_RS_EXPORT bool cxxbridge1$string$from_utf16(rust::String *self,
+                                                const char16_t *ptr,
+                                                std::size_t len) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$from_utf16_lossy(rust::String *self,
+                                                      const char16_t *ptr,
+                                                      std::size_t len) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$drop(rust::String *self) noexcept;
+CXX_RS_EXPORT const char *
+cxxbridge1$string$ptr(const rust::String *self) noexcept;
+CXX_RS_EXPORT std::size_t
+cxxbridge1$string$len(const rust::String *self) noexcept;
+CXX_RS_EXPORT std::size_t
+cxxbridge1$string$capacity(const rust::String *self) noexcept;
+CXX_RS_EXPORT void
+cxxbridge1$string$reserve_additional(rust::String *self,
+                                     size_t additional) noexcept;
+CXX_RS_EXPORT void cxxbridge1$string$reserve_total(rust::String *self,
+                                                   size_t new_cap) noexcept;
 
 // rust::Str
-void cxxbridge1$str$new(rust::Str *self) noexcept;
-void cxxbridge1$str$ref(rust::Str *self, const rust::String *string) noexcept;
-bool cxxbridge1$str$from(rust::Str *self, const char *ptr,
-                         std::size_t len) noexcept;
-const char *cxxbridge1$str$ptr(const rust::Str *self) noexcept;
-std::size_t cxxbridge1$str$len(const rust::Str *self) noexcept;
+CXX_RS_EXPORT void cxxbridge1$str$new(rust::Str *self) noexcept;
+CXX_RS_EXPORT void cxxbridge1$str$ref(rust::Str *self,
+                                      const rust::String *string) noexcept;
+CXX_RS_EXPORT bool cxxbridge1$str$from(rust::Str *self, const char *ptr,
+                                       std::size_t len) noexcept;
+CXX_RS_EXPORT const char *cxxbridge1$str$ptr(const rust::Str *self) noexcept;
+CXX_RS_EXPORT std::size_t cxxbridge1$str$len(const rust::Str *self) noexcept;
 
 // rust::Slice
-void cxxbridge1$slice$new(void *self, const void *ptr,
-                          std::size_t len) noexcept;
-void *cxxbridge1$slice$ptr(const void *self) noexcept;
-std::size_t cxxbridge1$slice$len(const void *self) noexcept;
+CXX_RS_EXPORT void cxxbridge1$slice$new(void *self, const void *ptr,
+                                        std::size_t len) noexcept;
+CXX_RS_EXPORT void *cxxbridge1$slice$ptr(const void *self) noexcept;
+CXX_RS_EXPORT std::size_t cxxbridge1$slice$len(const void *self) noexcept;
 } // extern "C"
 
 namespace rust {
@@ -83,7 +105,7 @@ void panic [[noreturn]] (const char *msg) {
 #endif
 }
 
-template void panic<std::out_of_range> [[noreturn]] (const char *msg);
+template void panic<std::out_of_range>[[noreturn]] (const char *msg);
 
 template <typename T>
 static bool is_aligned(const void *ptr) noexcept {
@@ -91,17 +113,17 @@ static bool is_aligned(const void *ptr) noexcept {
   return !(iptr % alignof(T));
 }
 
-String::String() noexcept { cxxbridge1$string$new(this); }
+CXX_CPP_EXPORT String::String() noexcept { cxxbridge1$string$new(this); }
 
-String::String(const String &other) noexcept {
+CXX_CPP_EXPORT String::String(const String &other) noexcept {
   cxxbridge1$string$clone(this, other);
 }
 
-String::String(String &&other) noexcept : repr(other.repr) {
+CXX_CPP_EXPORT String::String(String &&other) noexcept : repr(other.repr) {
   cxxbridge1$string$new(&other);
 }
 
-String::~String() noexcept { cxxbridge1$string$drop(this); }
+CXX_CPP_EXPORT String::~String() noexcept { cxxbridge1$string$drop(this); }
 
 static void initString(String *self, const char *s, std::size_t len) {
   if (!cxxbridge1$string$from_utf8(self, s, len)) {
@@ -115,27 +137,29 @@ static void initString(String *self, const char16_t *s, std::size_t len) {
   }
 }
 
-String::String(const std::string &s) { initString(this, s.data(), s.length()); }
+CXX_CPP_EXPORT String::String(const std::string &s) {
+  initString(this, s.data(), s.length());
+}
 
-String::String(const char *s) {
+CXX_CPP_EXPORT String::String(const char *s) {
   assert(s != nullptr);
   initString(this, s, std::strlen(s));
 }
 
-String::String(const char *s, std::size_t len) {
+CXX_CPP_EXPORT String::String(const char *s, std::size_t len) {
   assert(s != nullptr || len == 0);
   initString(this,
              s == nullptr && len == 0 ? reinterpret_cast<const char *>(1) : s,
              len);
 }
 
-String::String(const char16_t *s) {
+CXX_CPP_EXPORT String::String(const char16_t *s) {
   assert(s != nullptr);
   assert(is_aligned<char16_t>(s));
   initString(this, s, std::char_traits<char16_t>::length(s));
 }
 
-String::String(const char16_t *s, std::size_t len) {
+CXX_CPP_EXPORT String::String(const char16_t *s, std::size_t len) {
   assert(s != nullptr || len == 0);
   assert(is_aligned<char16_t>(s));
   initString(this,
@@ -146,46 +170,49 @@ String::String(const char16_t *s, std::size_t len) {
 
 struct String::lossy_t {};
 
-String::String(lossy_t, const char *s, std::size_t len) noexcept {
+CXX_CPP_EXPORT String::String(lossy_t, const char *s,
+                              std::size_t len) noexcept {
   cxxbridge1$string$from_utf8_lossy(
       this, s == nullptr && len == 0 ? reinterpret_cast<const char *>(1) : s,
       len);
 }
 
-String::String(lossy_t, const char16_t *s, std::size_t len) noexcept {
+CXX_CPP_EXPORT String::String(lossy_t, const char16_t *s,
+                              std::size_t len) noexcept {
   cxxbridge1$string$from_utf16_lossy(
       this,
       s == nullptr && len == 0 ? reinterpret_cast<const char16_t *>(2) : s,
       len);
 }
 
-String String::lossy(const std::string &s) noexcept {
+CXX_CPP_EXPORT String String::lossy(const std::string &s) noexcept {
   return String::lossy(s.data(), s.length());
 }
 
-String String::lossy(const char *s) noexcept {
+CXX_CPP_EXPORT String String::lossy(const char *s) noexcept {
   assert(s != nullptr);
   return String::lossy(s, std::strlen(s));
 }
 
-String String::lossy(const char *s, std::size_t len) noexcept {
+CXX_CPP_EXPORT String String::lossy(const char *s, std::size_t len) noexcept {
   assert(s != nullptr || len == 0);
   return String(lossy_t{}, s, len);
 }
 
-String String::lossy(const char16_t *s) noexcept {
+CXX_CPP_EXPORT String String::lossy(const char16_t *s) noexcept {
   assert(s != nullptr);
   assert(is_aligned<char16_t>(s));
   return String(lossy_t{}, s, std::char_traits<char16_t>::length(s));
 }
 
-String String::lossy(const char16_t *s, std::size_t len) noexcept {
+CXX_CPP_EXPORT String String::lossy(const char16_t *s,
+                                    std::size_t len) noexcept {
   assert(s != nullptr || len == 0);
   assert(is_aligned<char16_t>(s));
   return String(lossy_t{}, s, len);
 }
 
-String &String::operator=(const String &other) &noexcept {
+CXX_CPP_EXPORT String &String::operator=(const String &other) &noexcept {
   if (this != &other) {
     cxxbridge1$string$drop(this);
     cxxbridge1$string$clone(this, other);
@@ -193,32 +220,32 @@ String &String::operator=(const String &other) &noexcept {
   return *this;
 }
 
-String &String::operator=(String &&other) &noexcept {
+CXX_CPP_EXPORT String &String::operator=(String &&other) &noexcept {
   cxxbridge1$string$drop(this);
   this->repr = other.repr;
   cxxbridge1$string$new(&other);
   return *this;
 }
 
-String::operator std::string() const {
+CXX_CPP_EXPORT String::operator std::string() const {
   return std::string(this->data(), this->size());
 }
 
-const char *String::data() const noexcept {
+CXX_CPP_EXPORT const char *String::data() const noexcept {
   return cxxbridge1$string$ptr(this);
 }
 
-std::size_t String::size() const noexcept {
+CXX_CPP_EXPORT std::size_t String::size() const noexcept {
   return cxxbridge1$string$len(this);
 }
 
-std::size_t String::length() const noexcept {
+CXX_CPP_EXPORT std::size_t String::length() const noexcept {
   return cxxbridge1$string$len(this);
 }
 
-bool String::empty() const noexcept { return this->size() == 0; }
+CXX_CPP_EXPORT bool String::empty() const noexcept { return this->size() == 0; }
 
-const char *String::c_str() noexcept {
+CXX_CPP_EXPORT const char *String::c_str() noexcept {
   auto len = this->length();
   cxxbridge1$string$reserve_additional(this, 1);
   auto ptr = this->data();
@@ -226,128 +253,151 @@ const char *String::c_str() noexcept {
   return ptr;
 }
 
-std::size_t String::capacity() const noexcept {
+CXX_CPP_EXPORT std::size_t String::capacity() const noexcept {
   return cxxbridge1$string$capacity(this);
 }
 
-void String::reserve(std::size_t new_cap) noexcept {
+CXX_CPP_EXPORT void String::reserve(std::size_t new_cap) noexcept {
   cxxbridge1$string$reserve_total(this, new_cap);
 }
 
-String::iterator String::begin() noexcept {
+CXX_CPP_EXPORT String::iterator String::begin() noexcept {
   return const_cast<char *>(this->data());
 }
 
-String::iterator String::end() noexcept {
+CXX_CPP_EXPORT String::iterator String::end() noexcept {
   return const_cast<char *>(this->data()) + this->size();
 }
 
-String::const_iterator String::begin() const noexcept { return this->cbegin(); }
+CXX_CPP_EXPORT String::const_iterator String::begin() const noexcept {
+  return this->cbegin();
+}
 
-String::const_iterator String::end() const noexcept { return this->cend(); }
+CXX_CPP_EXPORT String::const_iterator String::end() const noexcept {
+  return this->cend();
+}
 
-String::const_iterator String::cbegin() const noexcept { return this->data(); }
+CXX_CPP_EXPORT String::const_iterator String::cbegin() const noexcept {
+  return this->data();
+}
 
-String::const_iterator String::cend() const noexcept {
+CXX_CPP_EXPORT String::const_iterator String::cend() const noexcept {
   return this->data() + this->size();
 }
 
-bool String::operator==(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator==(const String &rhs) const noexcept {
   return rust::Str(*this) == rust::Str(rhs);
 }
 
-bool String::operator!=(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator!=(const String &rhs) const noexcept {
   return rust::Str(*this) != rust::Str(rhs);
 }
 
-bool String::operator<(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator<(const String &rhs) const noexcept {
   return rust::Str(*this) < rust::Str(rhs);
 }
 
-bool String::operator<=(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator<=(const String &rhs) const noexcept {
   return rust::Str(*this) <= rust::Str(rhs);
 }
 
-bool String::operator>(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator>(const String &rhs) const noexcept {
   return rust::Str(*this) > rust::Str(rhs);
 }
 
-bool String::operator>=(const String &rhs) const noexcept {
+CXX_CPP_EXPORT bool String::operator>=(const String &rhs) const noexcept {
   return rust::Str(*this) >= rust::Str(rhs);
 }
 
-void String::swap(String &rhs) noexcept {
+CXX_CPP_EXPORT void String::swap(String &rhs) noexcept {
   using std::swap;
   swap(this->repr, rhs.repr);
 }
 
-String::String(unsafe_bitcopy_t, const String &bits) noexcept
+CXX_CPP_EXPORT String::String(unsafe_bitcopy_t, const String &bits) noexcept
     : repr(bits.repr) {}
 
-std::ostream &operator<<(std::ostream &os, const String &s) {
+CXX_CPP_EXPORT std::ostream &operator<<(std::ostream &os, const String &s) {
   os.write(s.data(), s.size());
   return os;
 }
 
-Str::Str() noexcept { cxxbridge1$str$new(this); }
+CXX_CPP_EXPORT Str::Str() noexcept { cxxbridge1$str$new(this); }
 
-Str::Str(const String &s) noexcept { cxxbridge1$str$ref(this, &s); }
+CXX_CPP_EXPORT Str::Str(const String &s) noexcept {
+  cxxbridge1$str$ref(this, &s);
+}
 
-static void initStr(Str *self, const char *ptr, std::size_t len) {
+CXX_CPP_EXPORT static void initStr(Str *self, const char *ptr,
+                                   std::size_t len) {
   if (!cxxbridge1$str$from(self, ptr, len)) {
     panic<std::invalid_argument>("data for rust::Str is not utf-8");
   }
 }
 
-Str::Str(const std::string &s) { initStr(this, s.data(), s.length()); }
+CXX_CPP_EXPORT Str::Str(const std::string &s) {
+  initStr(this, s.data(), s.length());
+}
 
-Str::Str(const char *s) {
+CXX_CPP_EXPORT Str::Str(const char *s) {
   assert(s != nullptr);
   initStr(this, s, std::strlen(s));
 }
 
-Str::Str(const char *s, std::size_t len) {
+CXX_CPP_EXPORT Str::Str(const char *s, std::size_t len) {
   assert(s != nullptr || len == 0);
   initStr(this,
           s == nullptr && len == 0 ? reinterpret_cast<const char *>(1) : s,
           len);
 }
 
-Str::operator std::string() const {
+CXX_CPP_EXPORT Str::operator std::string() const {
   return std::string(this->data(), this->size());
 }
 
-const char *Str::data() const noexcept { return cxxbridge1$str$ptr(this); }
+CXX_CPP_EXPORT const char *Str::data() const noexcept {
+  return cxxbridge1$str$ptr(this);
+}
 
-std::size_t Str::size() const noexcept { return cxxbridge1$str$len(this); }
+CXX_CPP_EXPORT std::size_t Str::size() const noexcept {
+  return cxxbridge1$str$len(this);
+}
 
-std::size_t Str::length() const noexcept { return this->size(); }
+CXX_CPP_EXPORT std::size_t Str::length() const noexcept { return this->size(); }
 
-bool Str::empty() const noexcept { return this->size() == 0; }
+CXX_CPP_EXPORT bool Str::empty() const noexcept { return this->size() == 0; }
 
-Str::const_iterator Str::begin() const noexcept { return this->cbegin(); }
+CXX_CPP_EXPORT Str::const_iterator Str::begin() const noexcept {
+  return this->cbegin();
+}
 
-Str::const_iterator Str::end() const noexcept { return this->cend(); }
+CXX_CPP_EXPORT Str::const_iterator Str::end() const noexcept {
+  return this->cend();
+}
 
-Str::const_iterator Str::cbegin() const noexcept { return this->data(); }
+CXX_CPP_EXPORT Str::const_iterator Str::cbegin() const noexcept {
+  return this->data();
+}
 
-Str::const_iterator Str::cend() const noexcept {
+CXX_CPP_EXPORT Str::const_iterator Str::cend() const noexcept {
   return this->data() + this->size();
 }
 
-bool Str::operator==(const Str &rhs) const noexcept {
+CXX_CPP_EXPORT bool Str::operator==(const Str &rhs) const noexcept {
   return this->size() == rhs.size() &&
          std::equal(this->begin(), this->end(), rhs.begin());
 }
 
-bool Str::operator!=(const Str &rhs) const noexcept { return !(*this == rhs); }
+CXX_CPP_EXPORT bool Str::operator!=(const Str &rhs) const noexcept {
+  return !(*this == rhs);
+}
 
-bool Str::operator<(const Str &rhs) const noexcept {
+CXX_CPP_EXPORT bool Str::operator<(const Str &rhs) const noexcept {
   return std::lexicographical_compare(this->begin(), this->end(), rhs.begin(),
                                       rhs.end());
 }
 
-bool Str::operator<=(const Str &rhs) const noexcept {
+CXX_CPP_EXPORT bool Str::operator<=(const Str &rhs) const noexcept {
   // std::mismatch(this->begin(), this->end(), rhs.begin(), rhs.end()), except
   // without Undefined Behavior on C++11 if rhs is shorter than *this.
   const_iterator liter = this->begin(), lend = this->end(), riter = rhs.begin(),
@@ -364,27 +414,34 @@ bool Str::operator<=(const Str &rhs) const noexcept {
   }
 }
 
-bool Str::operator>(const Str &rhs) const noexcept { return rhs < *this; }
+CXX_CPP_EXPORT bool Str::operator>(const Str &rhs) const noexcept {
+  return rhs < *this;
+}
 
-bool Str::operator>=(const Str &rhs) const noexcept { return rhs <= *this; }
+CXX_CPP_EXPORT bool Str::operator>=(const Str &rhs) const noexcept {
+  return rhs <= *this;
+}
 
-void Str::swap(Str &rhs) noexcept {
+CXX_CPP_EXPORT void Str::swap(Str &rhs) noexcept {
   using std::swap;
   swap(this->repr, rhs.repr);
 }
 
-std::ostream &operator<<(std::ostream &os, const Str &s) {
+CXX_CPP_EXPORT std::ostream &operator<<(std::ostream &os, const Str &s) {
   os.write(s.data(), s.size());
   return os;
 }
 
-void sliceInit(void *self, const void *ptr, std::size_t len) noexcept {
+CXX_CPP_EXPORT void sliceInit(void *self, const void *ptr,
+                              std::size_t len) noexcept {
   cxxbridge1$slice$new(self, ptr, len);
 }
 
-void *slicePtr(const void *self) noexcept { return cxxbridge1$slice$ptr(self); }
+CXX_CPP_EXPORT void *slicePtr(const void *self) noexcept {
+  return cxxbridge1$slice$ptr(self);
+}
 
-std::size_t sliceLen(const void *self) noexcept {
+CXX_CPP_EXPORT std::size_t sliceLen(const void *self) noexcept {
   return cxxbridge1$slice$len(self);
 }
 
@@ -455,7 +512,8 @@ static const char *errorCopy(const char *ptr, std::size_t len) {
 }
 
 extern "C" {
-const char *cxxbridge1$error(const char *ptr, std::size_t len) noexcept {
+CXX_RS_EXPORT const char *cxxbridge1$error(const char *ptr,
+                                           std::size_t len) noexcept {
   return errorCopy(ptr, len);
 }
 } // extern "C"
@@ -532,23 +590,24 @@ void destroy(T *ptr) {
 } // namespace
 
 extern "C" {
-void cxxbridge1$unique_ptr$std$string$null(
+CXX_RS_EXPORT void cxxbridge1$unique_ptr$std$string$null(
     std::unique_ptr<std::string> *ptr) noexcept {
   new (ptr) std::unique_ptr<std::string>();
 }
-void cxxbridge1$unique_ptr$std$string$raw(std::unique_ptr<std::string> *ptr,
-                                          std::string *raw) noexcept {
+CXX_RS_EXPORT void
+cxxbridge1$unique_ptr$std$string$raw(std::unique_ptr<std::string> *ptr,
+                                     std::string *raw) noexcept {
   new (ptr) std::unique_ptr<std::string>(raw);
 }
-const std::string *cxxbridge1$unique_ptr$std$string$get(
+CXX_RS_EXPORT const std::string *cxxbridge1$unique_ptr$std$string$get(
     const std::unique_ptr<std::string> &ptr) noexcept {
   return ptr.get();
 }
-std::string *cxxbridge1$unique_ptr$std$string$release(
+CXX_RS_EXPORT std::string *cxxbridge1$unique_ptr$std$string$release(
     std::unique_ptr<std::string> &ptr) noexcept {
   return ptr.release();
 }
-void cxxbridge1$unique_ptr$std$string$drop(
+CXX_RS_EXPORT void cxxbridge1$unique_ptr$std$string$drop(
     std::unique_ptr<std::string> *ptr) noexcept {
   ptr->~unique_ptr();
 }
@@ -563,67 +622,67 @@ static_assert(sizeof(std::string) <= kMaxExpectedWordsInString * sizeof(void *),
 } // namespace
 
 #define STD_VECTOR_OPS(RUST_TYPE, CXX_TYPE)                                    \
-  std::size_t cxxbridge1$std$vector$##RUST_TYPE##$size(                        \
+  CXX_RS_EXPORT std::size_t cxxbridge1$std$vector$##RUST_TYPE##$size(          \
       const std::vector<CXX_TYPE> &s) noexcept {                               \
     return s.size();                                                           \
   }                                                                            \
-  CXX_TYPE *cxxbridge1$std$vector$##RUST_TYPE##$get_unchecked(                 \
+  CXX_RS_EXPORT CXX_TYPE *cxxbridge1$std$vector$##RUST_TYPE##$get_unchecked(   \
       std::vector<CXX_TYPE> *s, std::size_t pos) noexcept {                    \
     return &(*s)[pos];                                                         \
   }                                                                            \
-  void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$null(                    \
+  CXX_RS_EXPORT void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$null(      \
       std::unique_ptr<std::vector<CXX_TYPE>> *ptr) noexcept {                  \
     new (ptr) std::unique_ptr<std::vector<CXX_TYPE>>();                        \
   }                                                                            \
-  void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$raw(                     \
+  CXX_RS_EXPORT void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$raw(       \
       std::unique_ptr<std::vector<CXX_TYPE>> *ptr,                             \
       std::vector<CXX_TYPE> *raw) noexcept {                                   \
     new (ptr) std::unique_ptr<std::vector<CXX_TYPE>>(raw);                     \
   }                                                                            \
-  const std::vector<CXX_TYPE>                                                  \
+  CXX_RS_EXPORT const std::vector<CXX_TYPE>                                    \
       *cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$get(                     \
           const std::unique_ptr<std::vector<CXX_TYPE>> &ptr) noexcept {        \
     return ptr.get();                                                          \
   }                                                                            \
-  std::vector<CXX_TYPE>                                                        \
+  CXX_RS_EXPORT std::vector<CXX_TYPE>                                          \
       *cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$release(                 \
           std::unique_ptr<std::vector<CXX_TYPE>> &ptr) noexcept {              \
     return ptr.release();                                                      \
   }                                                                            \
-  void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$drop(                    \
+  CXX_RS_EXPORT void cxxbridge1$unique_ptr$std$vector$##RUST_TYPE##$drop(      \
       std::unique_ptr<std::vector<CXX_TYPE>> *ptr) noexcept {                  \
     ptr->~unique_ptr();                                                        \
   }
 
 #define STD_VECTOR_TRIVIAL_OPS(RUST_TYPE, CXX_TYPE)                            \
-  void cxxbridge1$std$vector$##RUST_TYPE##$push_back(                          \
+  CXX_RS_EXPORT void cxxbridge1$std$vector$##RUST_TYPE##$push_back(            \
       std::vector<CXX_TYPE> *v, CXX_TYPE *value) noexcept {                    \
     v->push_back(std::move(*value));                                           \
     destroy(value);                                                            \
   }                                                                            \
-  void cxxbridge1$std$vector$##RUST_TYPE##$pop_back(std::vector<CXX_TYPE> *v,  \
-                                                    CXX_TYPE *out) noexcept {  \
+  CXX_RS_EXPORT void cxxbridge1$std$vector$##RUST_TYPE##$pop_back(             \
+      std::vector<CXX_TYPE> *v, CXX_TYPE *out) noexcept {                      \
     new (out) CXX_TYPE(std::move(v->back()));                                  \
     v->pop_back();                                                             \
   }
 
 #define RUST_VEC_EXTERNS(RUST_TYPE, CXX_TYPE)                                  \
-  void cxxbridge1$rust_vec$##RUST_TYPE##$new(                                  \
+  CXX_RS_EXPORT void cxxbridge1$rust_vec$##RUST_TYPE##$new(                    \
       rust::Vec<CXX_TYPE> *ptr) noexcept;                                      \
-  void cxxbridge1$rust_vec$##RUST_TYPE##$drop(                                 \
+  CXX_RS_EXPORT void cxxbridge1$rust_vec$##RUST_TYPE##$drop(                   \
       rust::Vec<CXX_TYPE> *ptr) noexcept;                                      \
-  std::size_t cxxbridge1$rust_vec$##RUST_TYPE##$len(                           \
+  CXX_RS_EXPORT std::size_t cxxbridge1$rust_vec$##RUST_TYPE##$len(             \
       const rust::Vec<CXX_TYPE> *ptr) noexcept;                                \
-  std::size_t cxxbridge1$rust_vec$##RUST_TYPE##$capacity(                      \
+  CXX_RS_EXPORT std::size_t cxxbridge1$rust_vec$##RUST_TYPE##$capacity(        \
       const rust::Vec<CXX_TYPE> *ptr) noexcept;                                \
-  const CXX_TYPE *cxxbridge1$rust_vec$##RUST_TYPE##$data(                      \
+  CXX_RS_EXPORT const CXX_TYPE *cxxbridge1$rust_vec$##RUST_TYPE##$data(        \
       const rust::Vec<CXX_TYPE> *ptr) noexcept;                                \
-  void cxxbridge1$rust_vec$##RUST_TYPE##$reserve_total(                        \
+  CXX_RS_EXPORT void cxxbridge1$rust_vec$##RUST_TYPE##$reserve_total(          \
       rust::Vec<CXX_TYPE> *ptr, std::size_t new_cap) noexcept;                 \
-  void cxxbridge1$rust_vec$##RUST_TYPE##$set_len(rust::Vec<CXX_TYPE> *ptr,     \
-                                                 std::size_t len) noexcept;    \
-  void cxxbridge1$rust_vec$##RUST_TYPE##$truncate(rust::Vec<CXX_TYPE> *ptr,    \
-                                                  std::size_t len) noexcept;
+  CXX_RS_EXPORT void cxxbridge1$rust_vec$##RUST_TYPE##$set_len(                \
+      rust::Vec<CXX_TYPE> *ptr, std::size_t len) noexcept;                     \
+  CXX_RS_EXPORT void cxxbridge1$rust_vec$##RUST_TYPE##$truncate(               \
+      rust::Vec<CXX_TYPE> *ptr, std::size_t len) noexcept;
 
 #define RUST_VEC_OPS(RUST_TYPE, CXX_TYPE)                                      \
   template <>                                                                  \
@@ -662,52 +721,52 @@ static_assert(sizeof(std::string) <= kMaxExpectedWordsInString * sizeof(void *),
 #define SHARED_PTR_OPS(RUST_TYPE, CXX_TYPE)                                    \
   static_assert(sizeof(std::shared_ptr<CXX_TYPE>) == 2 * sizeof(void *), "");  \
   static_assert(alignof(std::shared_ptr<CXX_TYPE>) == alignof(void *), "");    \
-  void cxxbridge1$std$shared_ptr$##RUST_TYPE##$null(                           \
+  CXX_RS_EXPORT void cxxbridge1$std$shared_ptr$##RUST_TYPE##$null(             \
       std::shared_ptr<CXX_TYPE> *ptr) noexcept {                               \
     new (ptr) std::shared_ptr<CXX_TYPE>();                                     \
   }                                                                            \
-  CXX_TYPE *cxxbridge1$std$shared_ptr$##RUST_TYPE##$uninit(                    \
+  CXX_RS_EXPORT CXX_TYPE *cxxbridge1$std$shared_ptr$##RUST_TYPE##$uninit(      \
       std::shared_ptr<CXX_TYPE> *ptr) noexcept {                               \
     CXX_TYPE *uninit =                                                         \
         reinterpret_cast<CXX_TYPE *>(new rust::MaybeUninit<CXX_TYPE>);         \
     new (ptr) std::shared_ptr<CXX_TYPE>(uninit);                               \
     return uninit;                                                             \
   }                                                                            \
-  void cxxbridge1$std$shared_ptr$##RUST_TYPE##$clone(                          \
+  CXX_RS_EXPORT void cxxbridge1$std$shared_ptr$##RUST_TYPE##$clone(            \
       const std::shared_ptr<CXX_TYPE> &self,                                   \
       std::shared_ptr<CXX_TYPE> *ptr) noexcept {                               \
     new (ptr) std::shared_ptr<CXX_TYPE>(self);                                 \
   }                                                                            \
-  const CXX_TYPE *cxxbridge1$std$shared_ptr$##RUST_TYPE##$get(                 \
+  CXX_RS_EXPORT const CXX_TYPE *cxxbridge1$std$shared_ptr$##RUST_TYPE##$get(   \
       const std::shared_ptr<CXX_TYPE> &self) noexcept {                        \
     return self.get();                                                         \
   }                                                                            \
-  void cxxbridge1$std$shared_ptr$##RUST_TYPE##$drop(                           \
+  CXX_RS_EXPORT void cxxbridge1$std$shared_ptr$##RUST_TYPE##$drop(             \
       const std::shared_ptr<CXX_TYPE> *self) noexcept {                        \
     self->~shared_ptr();                                                       \
   }                                                                            \
   static_assert(sizeof(std::weak_ptr<CXX_TYPE>) == 2 * sizeof(void *), "");    \
   static_assert(alignof(std::weak_ptr<CXX_TYPE>) == alignof(void *), "");      \
-  void cxxbridge1$std$weak_ptr$##RUST_TYPE##$null(                             \
+  CXX_RS_EXPORT void cxxbridge1$std$weak_ptr$##RUST_TYPE##$null(               \
       std::weak_ptr<CXX_TYPE> *ptr) noexcept {                                 \
     new (ptr) std::weak_ptr<CXX_TYPE>();                                       \
   }                                                                            \
-  void cxxbridge1$std$weak_ptr$##RUST_TYPE##$clone(                            \
+  CXX_RS_EXPORT void cxxbridge1$std$weak_ptr$##RUST_TYPE##$clone(              \
       const std::weak_ptr<CXX_TYPE> &self,                                     \
       std::weak_ptr<CXX_TYPE> *ptr) noexcept {                                 \
     new (ptr) std::weak_ptr<CXX_TYPE>(self);                                   \
   }                                                                            \
-  void cxxbridge1$std$weak_ptr$##RUST_TYPE##$downgrade(                        \
+  CXX_RS_EXPORT void cxxbridge1$std$weak_ptr$##RUST_TYPE##$downgrade(          \
       const std::shared_ptr<CXX_TYPE> &shared,                                 \
       std::weak_ptr<CXX_TYPE> *weak) noexcept {                                \
     new (weak) std::weak_ptr<CXX_TYPE>(shared);                                \
   }                                                                            \
-  void cxxbridge1$std$weak_ptr$##RUST_TYPE##$upgrade(                          \
+  CXX_RS_EXPORT void cxxbridge1$std$weak_ptr$##RUST_TYPE##$upgrade(            \
       const std::weak_ptr<CXX_TYPE> &weak,                                     \
       std::shared_ptr<CXX_TYPE> *shared) noexcept {                            \
     new (shared) std::shared_ptr<CXX_TYPE>(weak.lock());                       \
   }                                                                            \
-  void cxxbridge1$std$weak_ptr$##RUST_TYPE##$drop(                             \
+  CXX_RS_EXPORT void cxxbridge1$std$weak_ptr$##RUST_TYPE##$drop(               \
       const std::weak_ptr<CXX_TYPE> *self) noexcept {                          \
     self->~weak_ptr();                                                         \
   }