From 412858de9094de06047a33237ebf12753324636e Mon Sep 17 00:00:00 2001
From: Kevin Mihelich <kevin@archlinuxarm.org>
Date: Wed, 11 Mar 2020 07:28:28 -0600
Subject: [PATCH] atomic
---
pipewire-jack/src/meson.build | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/pipewire-jack/src/meson.build b/pipewire-jack/src/meson.build
index 68821a1b..70bdd21b 100644
--- a/pipewire-jack/src/meson.build
+++ b/pipewire-jack/src/meson.build
@@ -13,12 +13,33 @@ pipewire_jack_c_args = [
#optional dependencies
jack_dep = dependency('jack', version : '>= 1.9.10', required : false)
+# Check for GCC style atomics
+dep_atomic = declare_dependency()
+
+if cc.compiles('int main() { int n; return __atomic_load_n(&n, __ATOMIC_ACQUIRE); }',
+ name : 'GCC atomic builtins')
+ # Not all atomic calls can be turned into lock-free instructions, in which
+ # GCC will make calls into the libatomic library. Check whether we need to
+ # link with -latomic.
+ #
+ # This can happen for 64-bit atomic operations on 32-bit architectures such
+ # as ARM.
+ if not cc.links('''#include <stdint.h>
+ int main() {
+ uint64_t n;
+ return (int)__atomic_load_n(&n, __ATOMIC_ACQUIRE);
+ }''',
+ name : 'GCC atomic builtins required -latomic')
+ dep_atomic = cc.find_library('atomic')
+ endif
+endif
+
pipewire_jack = shared_library('jack-pw',
pipewire_jack_sources,
soversion : pipewire_version,
c_args : pipewire_jack_c_args,
include_directories : [configinc],
- dependencies : [pipewire_dep, jack_dep, mathlib],
+ dependencies : [pipewire_dep, jack_dep, mathlib, dep_atomic],
install : true,
)
--
2.24.1