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On 09 Mar 2016 02:24, Piotr Henryk Dabrowski wrote: > --- a/configure.ac > +++ b/configure.ac > @@ -1704,6 +1704,24 @@ AC_SUBST(libc_cv_cxx_thread_local) > AC_LANG_POP([C++]) > dnl End of C++ feature tests. > > +# SYS_cpuid syscall > +libc_cv_sys_cpuid=no > +AC_MSG_CHECKING(for x86 kernel with SYS_cpuid support) > +AC_TRY_COMPILE([ > + #if (defined(__i386__) || defined(__x86_64__)) && defined(__linux__) > + #include <sys/syscall.h> > + #if !defined(SYS_cpuid) || !defined(__NR_cpuid) > + #error SYS_cpuid not defined > + #endif > + #else > + #error Not a x86 Linux > + #endif > +], [], [libc_cv_sys_cpuid=yes], [libc_cv_sys_cpuid=no]) > +if test "$libc_cv_sys_cpuid" = yes; then > + AC_DEFINE(HAVE_SYS_CPUID) > +fi > +AC_MSG_RESULT($libc_cv_sys_cpuid) don't think you need this here. you can define __ASSUME_CPUID in kernel-features.h and use that everywhere. look at that file and symbols it defins as an example. > + Copyright (C) 2016 Piotr Henryk Dabrowski <ultr@ultr.pl> nope -- you'll need to sign copyright papers w/the FSF > +/* NOTE: for new Linux kernels these functions try to use kernel-adjusted > + values for cpuid returned by the SYS_cpuid sys call. > + Otherwise they fallback to native cpuid implementation. */ GNU style: two spaces after periods > + if (INLINE_SYSCALL(cpuid, 6, level, count, eax, ebx, ecx, edx) == 0) GNU style: put spaces before the ( w/func calls -mike
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