From 624f430dd0a91344146a2b8d49a69f23560c2fa2 Mon Sep 17 00:00:00 2001
From: Alistair Francis <alistair@alistair23.me>
Date: Thu, 14 Nov 2019 13:08:31 -0800
Subject: [PATCH] meson.build: make TLS ELF optional

USE_ELF_TLS has replaced GLX_USE_TLS so this patch is the original "make
TLS GLX optional again" patch updated to the latest mesa.

For details, see:
https://gitlab.freedesktop.org/mesa/mesa/-/issues/966

This prevents runtime segfault on musl:

Traceback (most recent call last):
  File "/home/pokybuild/yocto-worker/musl-qemux86/build/meta/lib/oeqa/core/decorator/__init__.py", line 36, in wrapped_f
    return func(*args, **kwargs)
  File "/home/pokybuild/yocto-worker/musl-qemux86/build/meta/lib/oeqa/runtime/cases/parselogs.py", line 378, in test_parselogs
    self.assertEqual(errcount, 0, msg=self.msg)
AssertionError: 1 != 0 : Log: /home/pokybuild/yocto-worker/musl-qemux86/build/build/tmp/work/qemux86-poky-linux-musl/core-image-sato-sdk/1.0-r0/target_logs/Xorg.0.log
-----------------------
Central error: [    10.477] (EE) Failed to load /usr/lib/xorg/modules/extensions/libglx.so: Error relocating /usr/lib/libGL.so.1: alphasort: initial-exec TLS resolves to dynamic definition in /usr/lib/libGL.so.1
***********************

Upstream-Status: Inappropriate [configuration]
Signed-off-by: Alistair Francis <alistair@alistair23.me>

---
 meson.build       | 2 +-
 meson_options.txt | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index efc6171..8450968 100644
--- a/meson.build
+++ b/meson.build
@@ -448,7 +448,7 @@ endif
 
 # Android uses emutls for versions <= P/28. For USE_ELF_TLS we need ELF TLS.
 use_elf_tls = false
-if not ['windows', 'freebsd', 'openbsd', 'haiku'].contains(host_machine.system()) and (not with_platform_android or get_option('platform-sdk-version') >= 29)
+if not ['windows', 'freebsd', 'openbsd', 'haiku'].contains(host_machine.system()) and (not with_platform_android or get_option('platform-sdk-version') >= 29) and get_option('elf-tls')
   pre_args += '-DUSE_ELF_TLS'
   use_elf_tls = true
 endif
diff --git a/meson_options.txt b/meson_options.txt
index fc73f6e..d7482c0 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -420,6 +420,12 @@ option(
   value : true,
   description : 'Enable direct rendering in GLX and EGL for DRI',
 )
+option(
+  'elf-tls',
+  type : 'boolean',
+  value : true,
+  description : 'Enable TLS support in ELF',
+)
 option(
   'prefer-iris',
   type : 'boolean',