Re: [PATCH 1/2] Add powerpc little-endian (ppc64le) flags

[Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>]

On 2015-06-30 11:29, Andrei Borzenkov wrote:
> On Tue, Jun 30, 2015 at 5:03 PM, Vladimir 'phcoder' Serbinenko
> <phcoder@gmail.com> wrote:
>> Which compilers support these flags? I'm concerned of breaking old compilers
>>
>
> -static and -mbig-endian are listed in gcc 2.95.3 documentation for PPC.

I asked some toolchain folks and this flag is really old. IIUC even 
before GCC 2.95, which was released at March 16, 2001.

>
>> Le 30 juin 2015 14:57, "Paulo Flabiano Smorigo"
>> <pfsmorigo@linux.vnet.ibm.com> a écrit :
>>>
>>> libgcc dependency was removed *just* for this target because
>>> the distros that use ppc64el doesn't have 32-bit support on it.
>>>
>>> * configure.ac: Add targets for powerpc64el and skip libgcc.
>>> * Makefile.am: Likewise.
>>> ---
>>>   configure.ac | 8 ++++++++
>>>   1 file changed, 8 insertions(+)
>>>
>>> diff --git a/configure.ac b/configure.ac
>>> index fd8a62e..0a79fad 100644
>>> --- a/configure.ac
>>> +++ b/configure.ac
>>> @@ -116,6 +116,7 @@ if test "x$with_platform" = x; then
>>>       x86_64-*) platform=pc ;;
>>>       powerpc-*) platform=ieee1275 ;;
>>>       powerpc64-*) platform=ieee1275 ;;
>>> +    powerpc64le-*) platform=ieee1275 ;;
>>>       sparc64-*) platform=ieee1275 ;;
>>>       mipsel-*) platform=loongson ;;
>>>       mips-*) platform=arc ;;
>>> @@ -138,6 +139,7 @@ case "$target_cpu"-"$platform" in
>>>     x86_64-none) ;;
>>>     x86_64-*) target_cpu=i386 ;;
>>>     powerpc64-ieee1275) target_cpu=powerpc ;;
>>> +  powerpc64le-ieee1275) target_cpu=powerpc ;;
>>>   esac
>>>
>>>   # Check if the platform is supported, make final adjustments.
>>> @@ -601,6 +603,12 @@ if test "x$target_cpu" = xi386 && test "x$platform"
>>> != xemu; then
>>>     TARGET_CFLAGS="$TARGET_CFLAGS -march=i386"
>>>   fi
>>>
>>> +if test x$target_cpu = xpowerpc; then
>>> +  TARGET_CFLAGS="$TARGET_CFLAGS -mbig-endian"
>>> +  TARGET_CCASFLAGS="$TARGET_CCASFLAGS -mbig-endian"
>>> +  TARGET_LDFLAGS="$TARGET_LDFLAGS -static -mbig-endian"
>>> +fi
>>> +
>>>   if test "x$target_m32" = x1; then
>>>     # Force 32-bit mode.
>>>     TARGET_CFLAGS="$TARGET_CFLAGS -m32"
>>> --
>>> 2.1.0
>>>
>>>
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>>
>>
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>


-- 
Paulo Flabiano Smorigo
IBM Linux Technology Center