From 31dc2951c758698bff060aeae8ffd8854616183b Mon Sep 17 00:00:00 2001
From: Bernd Kuhls <bernd.kuhls@t-online.de>
Date: Fri, 12 Feb 2016 19:25:02 +0100
Subject: [PATCH] Fix usage of __GLIBC_PREREQ for non-glibc toolchains

The way __GLIBC_PREREQ() is currently used means that it's evaluated
even if __GLIBC__ is not defined. But obviously, __GLIBC_PREREQ will
not exist if __GLIBC__ is not defined, causing build failures on C
libraries not defining __GLIBC__ such as the musl C library.

Patch originally taken from:
https://github.com/voidlinux/void-packages/blob/master/srcpkgs/numactl/patches/musl.patch

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
[Bernd: Reworked to fix uClibc]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
[Thomas: improve patch description.]
[Upstream commit: https://github.com/numactl/numactl/commit/31dc2951c758698bff060aeae8ffd8854616183b]
---
 syscall.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/syscall.c b/syscall.c
index 37782d9..255853d 100644
--- a/syscall.c
+++ b/syscall.c
@@ -115,7 +115,11 @@
 
 #endif
 
-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 11)
+#ifndef __GLIBC_PREREQ
+# define __GLIBC_PREREQ(x,y) 0
+#endif
+
+#if defined(__GLIBC__) && __GLIBC_PREREQ(2, 11)
 
 /* glibc 2.11 seems to have working 6 argument sycall. Use the
    glibc supplied syscall in this case.