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Re: how to enable -mlong-double-128 option
On Fri, Nov 7, 2008 at 11:22 PM, Ian Lance Taylor <iant@google.com> wrote:
> "Jason Pernito" <jpernito@gmail.com> writes:
>
>> Sorry if this is a duplicate post but I can't seem to find one and I
>> am also unable to figure out how to make host gcc recognize this
>> command line option. I already enabled --with-long-double-128 option
>> during configure but it is not working when I ran the built gcc. By
>> the way, I am using gcc-4.3.2.
>
> The -mlong-double-128 option only exists for the Alpha or the S/390.
> As you using one of those targets? You didn't say.
>
Actually, I am building glibc-2.8-20081103 for powerpc-750-linux-gnu
target and it failed with this during configure:
checking whether gcc -g -O2 -mlong-double-128 uses IBM extended format... no
checking whether gcc -g -O2 supports -mabi=ibmlongdouble... no
configure: error: this configuration requires -mlong-double-128 IBM
extended format support
make: *** [/bonus/scratch/jpernito/btools/build_timestamps/powerpc-750-linux-gnu_gcc-4.3.2_glibc-20081013_pass1]
Error 1
-jason
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