From cb6db86a2832564ec862d95b1ae14a47a9f4572f Mon Sep 17 00:00:00 2001
From: Kenny Levinsen <kl@kl.wtf>
Date: Mon, 14 Jun 2021 15:34:30 +0200
Subject: [PATCH] meson: Make private static library symbols local

Static libraries are not affected by our symbol file, so private symbols
are globally visible by default.

Use objcopy to make symbols that we do not want to expose local.

Closes: https://github.com/swaywm/wlroots/issues/1892
Closes: https://github.com/swaywm/wlroots/issues/2952
---
 meson.build | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/meson.build b/meson.build
index 36bf6e8b6..6c6b2b230 100644
--- a/meson.build
+++ b/meson.build
@@ -150,8 +150,30 @@ lib_wlr = library(
 	install: true,
 	link_args: symbols_flag,
 	link_depends: symbols_file,
+	prelink: true,
 )
 
+if get_option('default_library') != 'shared'
+	lib_target = lib_wlr
+	if get_option('default_library') == 'both'
+		lib_target = lib_wlr.get_static_lib()
+	endif
+	objcopy_prog = find_program('objcopy', native: true)
+	custom_target('libwlroots',
+		input: lib_target,
+		output: lib_target.name() + '.is-stripped',
+		capture: true,
+		command: [
+			objcopy_prog.full_path(), '-w',
+			'--localize-symbol=!wlr_*',
+			'--localize-symbol=!_wlr_*',
+			'--localize-symbol=*',
+			'@INPUT@',
+		],
+		build_by_default: true,
+	)
+endif
+
 wlr_vars = {}
 foreach name, have : features
 	wlr_vars += { 'have_' + name.underscorify(): have.to_string() }