From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Mon, 25 Dec 2017 10:42:42 +0000 (+0900)
Subject: meson: define _GNU_SOURCE to detect copy_file_range() (#7734)
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=2c6a42ac57f8096e29e4d71cb758f04a71ebba77;p=elogind.git

meson: define _GNU_SOURCE to detect copy_file_range() (#7734)

Follow-up for bad7a0c81f501fbbcc79af9eaa4b8254441c4a1f of git
repository for glibc.

Recently glibc added `copy_file_range()`, but to use it,
`_GNU_SOURCE` needs to be defined. This adds the flag in
meson.build to detect the function by meson correctly.
---

diff --git a/meson.build b/meson.build
index 2501fe5cc..c9ce60a97 100644
--- a/meson.build
+++ b/meson.build
@@ -532,7 +532,8 @@ foreach ident : [
         ['kcmp',              '''#include <linux/kcmp.h>'''],
         ['keyctl',            '''#include <sys/types.h>
                                  #include <keyutils.h>'''],
-        ['copy_file_range',   '''#include <sys/syscall.h>
+        ['copy_file_range',   '''#define _GNU_SOURCE
+//                                 #include <sys/syscall.h>
                                  #include <unistd.h>'''],
         ['bpf',               '''#include <sys/syscall.h>
                                  #include <unistd.h>'''],