On Wed, Dec 04, 2013 at 08:49:32AM +0100, Aurelien Jarno wrote:
> On sparc, the --with-long-double-128 option doesn't change anything for
> a 64-bit compiler, as it always default to 128-bit long doubles. For
> a 32/64-bit compiler defaulting to 32-bit this correctly control the
> size of long double of the 32-bit compiler, however for a 32/64-bit
> compiler defaulting to 64-bit, the built-in specs force the
> -mlong-double-64 option. This makes the option useless in this case.
>
> The patch below fixes that by removing the -mlong-double-64 from the
> built-in spec, using the default instead.
So how do you configure 64/32-bit compiler defaulting to 64-bit, where
32-bit defaults to -mlong-double-64?
> Changelog gcc/
>
> 2013-12-04 Aurelien Jarno <aurel...@aurel32.net>
>
> * config/sparc/linux64.h (CC1_SPEC): When defaulting to 64-bit,
> don't force -mlong-double-64 when -m32 or -mv8plus is given.
>
> Index: gcc/config/sparc/linux64.h
> ===================================================================
> --- gcc/config/sparc/linux64.h (revision 205647)
> +++ gcc/config/sparc/linux64.h (working copy)
> @@ -162,9 +162,9 @@
> #else
> #define CC1_SPEC "%{profile:-p} \
> %{m32:%{m64:%emay not use both -m32 and -m64}} \
> -%{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
> +%{m32:-mptr32 -mno-stack-bias \
> %{!mcpu*:-mcpu=cypress}} \
> -%{mv8plus:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
> +%{mv8plus:-mptr32 -mno-stack-bias \
> %{!mcpu*:-mcpu=v9}} \
> %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
> %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}} \
Jakub
