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Fix build failure on glibc 2.28 where 'renameat2' would end up being
declared twice: <https://github.com/systemd/casync/issues/166>.
From 625244ca47e8ee1375d2d0092271bfd13b0913ea Mon Sep 17 00:00:00 2001
From: Daniel Mack <daniel@zonque.org>
Date: Tue, 13 Nov 2018 17:52:48 +0100
Subject: [PATCH] meson.build: pass -D_GNU_SOURCE when checking for functions
As described in #166, -D_GNU_SOURCE needs to be passed to the meson function
availability checker. h/t to @tomeon for providing a link to the solution as
well.
---
meson.build | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/meson.build b/meson.build
index f42ed16..c0f741e 100644
--- a/meson.build
+++ b/meson.build
@@ -78,6 +78,6 @@ foreach ident : [
['copy_file_range', '''#include <sys/syscall.h>
#include <unistd.h>'''],
]
- have = cc.has_function(ident[0], prefix : ident[1])
+ have = cc.has_function(ident[0], args : '-D_GNU_SOURCE', prefix : ident[1])
conf.set10('HAVE_' + ident[0].to_upper(), have)
endforeach
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