[lttng-dev] [PATCH lttng-ust] Default to no unaligned access on unsupported archs

[Mathieu Desnoyers]

Merged with a small configure output layout modification.

Thanks!

Mathieu

----- On Jun 30, 2015, at 11:55 AM, Michael Jeanson mjeanson at efficios.com wrote:

> Signed-off-by: Michael Jeanson <mjeanson at efficios.com>
> ---
> configure.ac | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/configure.ac b/configure.ac
> index 03483a7..5901dfb 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -241,7 +241,10 @@ changequote([,])dnl
> 	aarch64) NO_UNALIGNED_ACCESS=1 ;;
> 	mips*) NO_UNALIGNED_ACCESS=1 ;;
> 	tile*) NO_UNALIGNED_ACCESS=1 ;;
> -	*) AC_MSG_ERROR([unable to detect alignment requirements (unsupported
> architecture ($host_cpu)?)]) ;;
> +	*)
> +		UNSUPPORTED_ARCH=1
> +		NO_UNALIGNED_ACCESS=1
> +		;;
> esac
> AC_MSG_RESULT([$host_cpu])
> 
> @@ -423,5 +426,10 @@ AS_ECHO_N("sdt.h integration:  ")
> AS_IF([test "x$with_sdt" = "xyes"], [AS_ECHO("Enabled")], [AS_ECHO("Disabled")])
> 
> AS_ECHO()
> +AS_ECHO_N("Architecture ($host_cpu) has efficient unaligned memory access: ")
> +AS_IF([test "x$NO_UNALIGNED_ACCESS" != "x1"], [AS_ECHO("yes")], [AS_IF([test
> "x$UNSUPPORTED_ARCH" != "x1"], [AS_ECHO("no")], [AS_ECHO("unknown")])])
> +AS_IF([test "x$UNSUPPORTED_ARCH" = "x1"], [AC_MSG_WARN([Your architecture
> ($host_cpu) is unsupported, using safe default of no unaligned access])])
> +AS_ECHO()
> +
> AS_ECHO("Type 'make' to compile.")
> 
> --
> 1.9.1

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com