From: Tim-Philipp Müller <tim@centricular.com>
Date: Thu, 10 Aug 2017 12:32:43 +0000 (+0100)
Subject: meson: hide symbols by default unless explicitly exported
X-Git-Tag: 1.16.2~691
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=be8eb436b245416b55d3a114a8f9a882dc8c4572;p=platform%2Fupstream%2Fgstreamer.git

meson: hide symbols by default unless explicitly exported
---

diff --git a/libs/gst/check/libcheck/meson.build b/libs/gst/check/libcheck/meson.build
index 6130764..176049a 100644
--- a/libs/gst/check/libcheck/meson.build
+++ b/libs/gst/check/libcheck/meson.build
@@ -54,11 +54,18 @@ configure_file(input : 'check.h.in',
 
 internal_check_h_inc = include_directories('..')
 
+# Must explicitly make symbols public if default visibility is hidden
+if have_visibility_hidden
+  libcheck_visibility_args = ['-DCK_DLL_EXP=extern __attribute__ ((visibility ("default")))']
+else
+  libcheck_visibility_args = ['-DCK_DLL_EXP=extern']
+endif
+
 libcheck = static_library('check',
   libcheck_files,
   include_directories : [configinc, internal_check_h_inc],
   dependencies : [rt_lib, mathlib],
-  c_args: gst_c_args +
+  c_args: gst_c_args + libcheck_visibility_args +
 	  # Don't want libcompat to think we don't have these and substitute
 	  # replacements since we don't check for or define these. See libcompat.h
 	  ['-DHAVE_VSNPRINTF', '-DHAVE_SNPRINTF', '-DHAVE_MALLOC', '-DHAVE_REALLOC'],
diff --git a/meson.build b/meson.build
index 4f728f0..bfc3ae2 100644
--- a/meson.build
+++ b/meson.build
@@ -48,6 +48,12 @@ elif cc.has_argument('-Wl,-Bsymbolic-functions')
   # FIXME: Add FATAL_WARNINGS from configure.ac
 endif
 
+# Symbol visibility
+have_visibility_hidden = cc.has_argument('-fvisibility=hidden')
+if have_visibility_hidden
+  add_project_arguments('-fvisibility=hidden', language: 'c')
+endif
+
 cdata = configuration_data()
 cdata.set_quoted('GST_API_VERSION', apiversion)
 cdata.set_quoted('GST_DATADIR', join_paths(prefix, get_option('datadir')))