[PATCH] Use syscall() for some platforms like Android without futimes() function

[Rafael Espíndola]

Why? setLastModificationAndAccessTime is only used by llvm-ar, are you
using that on Android?

On 6 April 2014 10:43, waxiadao at gmail.com <waxiadao at gmail.com> wrote:
> A very simple patch...It's tested and works fine.
>
> Index: autoconf/configure.ac
> ===================================================================
> --- autoconf/configure.ac (revision 205687)
> +++ autoconf/configure.ac (working copy)
> @@ -1723,6 +1723,7 @@
>  AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h link.h])
>  AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h termios.h unistd.h])
>  AC_CHECK_HEADERS([utime.h])
> +AC_CHECK_HEADERS([sys/syscall.h])
>  AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h sys/uio.h])
>  AC_CHECK_HEADERS([sys/ioctl.h malloc/malloc.h mach/mach.h])
>  AC_CHECK_HEADERS([valgrind/valgrind.h])
> @@ -1804,6 +1805,7 @@
>  AC_CHECK_FUNCS([strtoll strtoq sysconf malloc_zone_statistics ])
>  AC_CHECK_FUNCS([setjmp longjmp sigsetjmp siglongjmp writev])
>  AC_CHECK_FUNCS([futimes futimens])
> +AC_CHECK_FUNCS([syscall])
>  AC_C_PRINTF_A
>  AC_FUNC_RAND48
>
> Index: lib/Support/Unix/Path.inc
> ===================================================================
> --- lib/Support/Unix/Path.inc (revision 205687)
> +++ lib/Support/Unix/Path.inc (working copy)
> @@ -43,6 +43,9 @@
>  # if HAVE_NDIR_H
>  #  include <ndir.h>
>  # endif
> +# if HAVE_SYS_SYSCALL_H
> +#  include <sys/syscall.h>
> +# endif
>  #endif
>
>  #ifdef __APPLE__
> @@ -464,6 +467,14 @@
>    if (::futimes(FD, Times))
>      return error_code(errno, system_category());
>    return error_code::success();
> +#elif defined(HAVE_SYSCALL)
> +  timeval Times[2];
> +  Times[0].tv_sec = Time.toEpochTime();
> +  Times[0].tv_usec = 0;
> +  Times[1] = Times[0];
> +  if (::syscall(__NR_utimensat, FD, 0, Times, 0))
> +    return error_code(errno, system_category());
> +  return error_code::success();
>  #else
>  #warning Missing futimes() and futimens()
>    return make_error_code(errc::not_supported);
>
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