package/ncmpc: fix build on sparc

Fixes:
 - http://autobuild.buildroot.org/results/7ac1a07e4f72633d3ec92b79dc5d8c062490abdc

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/ncmpc/0002-meson.build-add-atomic-dependency-for-sparc.patch

@@ -0,0 +1,43 @@
+From d2bd33ec18c146b27fb5aff7dd0089faa195ef9b Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Mon, 11 Feb 2019 21:42:01 +0100
+Subject: [PATCH] meson.build: add atomic dependency for sparc
+
+Linking with libatomic is needed on sparc otherwise build fails on:
+ncmpc@exe/src_Main.cxx.o: In function `std::__atomic_base<long>::operator++()':
+/home/buildroot/autobuild/instance-1/output/host/opt/ext-toolchain/sparc-buildroot-linux-uclibc/include/c++/6.4.0/bits/atomic_base.h:296: undefined reference to `__atomic_fetch_add_4'
+
+Fixes:
+ - http://autobuild.buildroot.org/results/7ac1a07e4f72633d3ec92b79dc5d8c062490abdc
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://github.com/MusicPlayerDaemon/ncmpc/pull/45]
+---
+ meson.build | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/meson.build b/meson.build
+index 2e6defc..b393e39 100644
+--- a/meson.build
++++ b/meson.build
+@@ -174,6 +174,9 @@ else
+   pcre_dep = declare_dependency()
+ endif
+ 
++# Needed on sparc 
++atomic_dep = cc.find_library('atomic', required: false)
++
+ inc = include_directories(
+   'src',
+ 
+@@ -352,6 +355,7 @@ ncmpc = executable('ncmpc',
+   sources,
+   include_directories: inc,
+   dependencies: [
++    atomic_dep,
+     thread_dep,
+     boost_dep,
+     pcre_dep,
+-- 
+2.14.1
+