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From: Szabolcs Nagy <nsz@port70.net>
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Subject: Re: compiling musl on x86_64 linux with ppc
Date: Wed, 13 Aug 2014 16:43:58 +0200
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* Rich Felker <dalias@libc.org> [2014-08-13 10:23:32 -0400]:
> BTW about the mmap2 preprocessor issue, did you raise that with ppc
> developers too? I think it's a bug on their side but I'm not 100%
> sure. If the code in musl is not valid C I'll change it, but if it is,

it is not valid c

http://port70.net/~nsz/c/c99/n1256.html#6.10.3p11

i'd fix it like

+#ifndef SYS_mmap2
+#define SYS_mmap2 SYS_mmap
+#endif
		mem = (void *)__syscall(
-#ifdef SYS_mmap2
			SYS_mmap2,
-#else
-			SYS_mmap,
-#endif