[FFmpeg-devel] [PATCH] mips/asmdefs: use asm/sgidefs.h header on linux
james410 at cowgill.org.uk
Sat Mar 7 19:08:53 CET 2015
On Sat, 2015-03-07 at 18:06 +0100, wm4 wrote:
> On Sat, 7 Mar 2015 10:13:23 +0000
> James Cowgill <james410 at cowgill.org.uk> wrote:
> > Unfortunately android < api 21 (lollipop) doesn't have the sgidefs.h header,
> > but the linux kernel does in asm/sgidefs.h. So use that header if we can.
> > Change _ABI64 to _MIPS_SIM_ABI64 which is defined in both headers.
> What does this header contain? Requiring kernel headers for anything
> but Linux specific syscalls or for building kernel modules is incredibly
Yes the correct header on mips is just 'sgidefs.h' and while glibc has
provided it for years, android bionic only added it for lollipop.
This is the kernel header:
The one provided by glibc has a little more stuff but we don't need it.
_MIPS_SIM is defined by GCC (and some older mips compilers) to be equal
to one of the _MIPS_SIM_* constants depending on which ABI is selected.
GCC and Clang also define _ABI* themselves (as well as being defined in
the glibc version of the header) for the current ABI, so I suppose using
this without including anything might work if we don't care about other
#if defined(_ABI64) && _MIPS_SIM == _ABI64
> And __linux__ is of course completely out of the question. Just because
> it's Linux, the libc doesn't necessarily provide kernel headers.
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