diff --git a/deps/ada/ada.gyp b/deps/ada/ada.gyp
index 30054e63e567..76a56b54f703 100644
--- a/deps/ada/ada.gyp
+++ b/deps/ada/ada.gyp
@@ -19,7 +19,21 @@
       'dependencies': [
         '../../tools/v8_gypfiles/v8.gyp:simdutf',
       ],
-      'sources': [ '<@(ada_sources)' ]
+      'sources': [ '<@(ada_sources)' ],
+      'conditions': [
+        # See the same setting in node.gyp.
+        ['node_shared=="false" and OS=="mac"', {
+          'xcode_settings': {
+            'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+            'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES'  # -fvisibility-inlines-hidden
+          },
+        }, 'node_shared=="false" and (OS!="aix" and OS!="os400") and (OS!="win" or clang==1)', {
+          'cflags': [
+            '-fvisibility=hidden',
+            '-fvisibility-inlines-hidden'
+          ],
+        }],  # MSVC hides the non-public symbols by default so no need to configure it.
+      ],
     },
   ]
 }
diff --git a/node.gyp b/node.gyp
index b99755575020..3b8784e2dec8 100644
--- a/node.gyp
+++ b/node.gyp
@@ -538,19 +538,21 @@
       ['clang==0 and OS!="win"', {
         'cflags': [ '-Wno-restrict', ],
       }],
-      # TODO(joyeecheung): investigate if it breaks addons.
-      # ['OS=="mac"', {
-      #   'xcode_settings': {
-      #     'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
-      #     'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES'  # -fvisibility-inlines-hidden
-      #   },
-      # }],
-      # ['OS!="win" or clang==1', {
-      #   'cflags': [
-      #     '-fvisibility=hidden',
-      #     '-fvisibility-inlines-hidden'
-      #   ],
-      # }],
+      # Build with -fvisibility=hidden and -fvisibility-inlines-hidden to avoid
+      # including unnecessary internal symbols, which may lead to run-time fixups.
+      # This is not done on AIX where symbols are exported by tools/create_expfile.sh
+      # see https://github.com/nodejs/node/pull/56290#issuecomment-2582703109
+      ['node_shared=="false" and OS=="mac"', {
+        'xcode_settings': {
+          'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+          'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES'  # -fvisibility-inlines-hidden
+        },
+      }, 'node_shared=="false" and (OS!="aix" and OS!="os400") and (OS!="win" or clang==1)', {
+        'cflags': [
+          '-fvisibility=hidden',
+          '-fvisibility-inlines-hidden'
+        ],
+      }],  # MSVC hides the non-public symbols by default so no need to configure it.
       # Pointer authentication for ARM64.
       ['target_arch=="arm64"', {
           'target_conditions': [
diff --git a/src/node.h b/src/node.h
index 02a4a4246c1b..413ae3d96e9f 100644
--- a/src/node.h
+++ b/src/node.h
@@ -1240,8 +1240,7 @@ NODE_EXTERN v8::Local<v8::Value> WinapiErrnoException(
     const char* path = nullptr);
 #endif
 
-const char* signo_string(int errorno);
-
+NODE_EXTERN const char* signo_string(int errorno);
 
 typedef void (*addon_register_func)(
     v8::Local<v8::Object> exports,
diff --git a/tools/icu/icu-generic.gyp b/tools/icu/icu-generic.gyp
index c4e8c6fbb9f8..636707b17f18 100644
--- a/tools/icu/icu-generic.gyp
+++ b/tools/icu/icu-generic.gyp
@@ -58,6 +58,18 @@
           [ 'OS == "mac" or OS == "ios"', {
             'xcode_settings': {'GCC_ENABLE_CPP_RTTI': 'YES' },
           }],
+          # See the same setting in node.gyp.
+          ['node_shared=="false" and OS=="mac"', {
+            'xcode_settings': {
+              'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+              'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES'  # -fvisibility-inlines-hidden
+            },
+          }, 'node_shared=="false" and (OS!="aix" and OS!="os400") and (OS!="win" or clang==1)', {
+            'cflags': [
+              '-fvisibility=hidden',
+              '-fvisibility-inlines-hidden'
+            ],
+          }],  # MSVC hides the non-public symbols by default so no need to configure it.
           [ 'OS == "win"', {
             'msvs_settings': {
               'VCCLCompilerTool': {'RuntimeTypeInfo': 'true'},
diff --git a/tools/v8_gypfiles/abseil.gyp b/tools/v8_gypfiles/abseil.gyp
index 1a1de3378605..47c90f83da41 100644
--- a/tools/v8_gypfiles/abseil.gyp
+++ b/tools/v8_gypfiles/abseil.gyp
@@ -377,6 +377,18 @@
             '<(ABSEIL_ROOT)/absl/time/internal/cctz/src/time_zone_name_win.cc',
           ],
         }],
+        # See the same setting in node.gyp.
+        ['node_shared=="false" and OS=="mac"', {
+          'xcode_settings': {
+            'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+            'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES'  # -fvisibility-inlines-hidden
+          },
+        }, 'node_shared=="false" and (OS!="aix" and OS!="os400") and (OS!="win" or clang==1)', {
+          'cflags': [
+            '-fvisibility=hidden',
+            '-fvisibility-inlines-hidden'
+          ],
+        }],  # MSVC hides the non-public symbols by default so no need to configure it.
       ],
     },  # abseil
   ]
diff --git a/tools/v8_gypfiles/v8.gyp b/tools/v8_gypfiles/v8.gyp
index 32fc99e2af9f..ece11893816f 100644
--- a/tools/v8_gypfiles/v8.gyp
+++ b/tools/v8_gypfiles/v8.gyp
@@ -52,10 +52,7 @@
       }
     },
     'conditions': [
-      # Build with -fvisibility=hidden and -fvisibility-inlines-hidden to avoid
-      # including unnecessary internal symbols, which may lead to run-time fixups.
-      # This is not done on AIX where symbols are exported by tools/create_expfile.sh
-      # see https://github.com/nodejs/node/pull/56290#issuecomment-2582703109
+      # See the same setting in node.gyp
       ['OS!="aix" and OS!="os400"', {
         'defines': [
           'BUILDING_V8_SHARED',  # Make V8_EXPORT visible.