Implement SIMD checks for FreeBSD/powerpc*

[pkubaj]

FreeBSD uses elf_aux_info() instead of getauxval().

[noloader]

Thank you very much.

We are probably missing a few FreeBSD specific checks.

[noloader]

Thanks again @pkubaj,

It looks like we are catching compile failures on FreeBSD 12 and 13. See https://github.com/noloader/cryptopp/runs/2437036069.

It looks like a FreeBSD bug to me. Including their headers causes the compile failure (https://github.com/weidai11/cryptopp/blob/master/cpu.cpp#L60):

#if defined(__FreeBSD__)
# include <machine/cpu.h>
# include <sys/auxv.h>
# include <sys/elf_common.h>
#endif

I got the header #include <sys/auxv.h> from https://www.freebsd.org/cgi/man.cgi?query=elf_aux_info. I don't recall where the other headers came from.

Would you be able to let the FreeBSD folks know?

In the mean time, I'll guard the includes for PowerPC only.

---

Here's the output from the compile. Unfortunately, the compile command is missing in the CirrusCI output.

        register_t      tf_r14;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
In file included from cpu.cpp:62:
In file included from /usr/include/machine/cpu.h:45:
In file included from /usr/include/machine/frame.h:37:
/usr/include/x86/frame.h:137:2: error: unknown type name 'register_t'; did you mean '__register_t'?
        register_t      tf_r15;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
In file included from cpu.cpp:62:
In file included from /usr/include/machine/cpu.h:45:
In file included from /usr/include/machine/frame.h:37:
/usr/include/x86/frame.h:141:2: error: unknown type name 'register_t'; did you mean '__register_t'?
        register_t      tf_addr;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
In file included from cpu.cpp:62:
In file included from /usr/include/machine/cpu.h:45:
In file included from /usr/include/machine/frame.h:37:
/usr/include/x86/frame.h:146:2: error: unknown type name 'register_t'; did you mean '__register_t'?
        register_t      tf_err;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
In file included from cpu.cpp:62:
In file included from /usr/include/machine/cpu.h:45:
In file included from /usr/include/machine/frame.h:37:
/usr/include/x86/frame.h:147:2: error: unknown type name 'register_t'; did you mean '__register_t'?
        register_t      tf_rip;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
In file included from cpu.cpp:62:
In file included from /usr/include/machine/cpu.h:45:
In file included from /usr/include/machine/frame.h:37:
/usr/include/x86/frame.h:148:2: error: unknown type name 'register_t'; did you mean '__register_t'?
        register_t      tf_cs;
        ^
/usr/include/x86/_types.h:104:19: note: '__register_t' declared here
typedef __int64_t       __register_t;
                        ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
gmake: *** [GNUmakefile:1767: cpu.o] Error 1
gmake: *** Waiting for unfinished jobs....

Exit status: 2

[noloader]

I ended up removing the problem hear, which was <machine/cpu.h>. Also see Commit 2619dbec0bfc.

Would you be able to test the change?