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inb/outb family for arm is only implemented on glibc
so assumption across linux is wrong

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Upstream-Status: Pending
Index: xorg-server-1.18.0/hw/xfree86/common/compiler.h
===================================================================
--- xorg-server-1.18.0.orig/hw/xfree86/common/compiler.h
+++ xorg-server-1.18.0/hw/xfree86/common/compiler.h
@@ -758,7 +758,7 @@ inl(unsigned short port)
     return xf86ReadMmio32Le((void *) ioBase, port);
 }
 
-#elif defined(__arm__) && defined(__linux__)
+#elif defined(__arm__) && defined(__GLIBC__)
 
 /* for Linux on ARM, we use the LIBC inx/outx routines */
 /* note that the appropriate setup via "ioperm" needs to be done */