From 3b6424fa29bbf2f9d1cee65f1bed4be033cbbc8e Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Thu, 23 May 2019 11:22:44 +0200
Subject: [PATCH] deps: histogram: unexport symbols

Fixes: https://github.com/nodejs/node-gyp/issues/1755
Fixes: https://github.com/nodejs/node/issues/27778
PR-URL: https://github.com/nodejs/node/pull/27779
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
---
 deps/histogram/histogram.gyp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/deps/histogram/histogram.gyp b/deps/histogram/histogram.gyp
index bcfa198f9d37c1..e3f5fd7a46bb72 100644
--- a/deps/histogram/histogram.gyp
+++ b/deps/histogram/histogram.gyp
@@ -3,6 +3,10 @@
     {
       'target_name': 'histogram',
       'type': 'static_library',
+      'cflags': ['-fvisibility=hidden'],
+      'xcode_settings': {
+        'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES',  # -fvisibility=hidden
+      },
       'include_dirs': ['src'],
       'direct_dependent_settings': {
         'include_dirs': [ 'src' ]