[LLVMdev] configure with clang vs gcc

[Eric Christopher]

On Mon, Feb 24, 2014 at 4:46 PM, reed kotler <rkotler at mips.com> wrote:
> On 02/24/2014 04:42 PM, Eric Christopher wrote:
>>
>> On Mon, Feb 24, 2014 at 4:40 PM, reed kotler <rkotler at mips.com> wrote:
>>>
>>> I need to leave soon and will take a look in the morning.
>>>
>>> I did look at the autoconf input files configure.ac
>>>
>>> There is a disable-zlib but not a disable-valgrind, even though it seems
>>> like there used to be.
>>> You can find scripts on the internet when you google of people adding
>>> disable-valgrind to configure.
>>>
>>> I can probably implement disable-valgrind in configure.ac.
>>
>> This isn't what I was asking. You can, of course, do that, but it's
>> orthogonal to the issue at hand. Basically my initial thought is that
>> it's using the contents of the build host and not the host.
>>
>> -eric
>
> Right.
>
> There are two issues.
>
> 1 ) THere should be a way to disable valgrind as you can for zlib.

*shrug* If you like. It's not your issue.

>
> 2) The configure script should be doing this properly on it's own.
> Most likely it's something like you are thinking; that it's making the
> decision
> based on the wrong criteria; host vs. target.
>

It absolutely should not be based on any sort of triple test whatsoever.

-eric

>
> #2 should also work but is not a requirement for me at this exact moment.
> I will fix it if I can see exactly what the issue is.
>
> Reed
>
>
>>> Reed
>>>
>>>
>>> On 02/24/2014 04:33 PM, Eric Christopher wrote:
>>>>
>>>> Have you looked at the compile lines during the configure? Is it using
>>>> the system includes/libraries when building with clang rather than the
>>>> target system?
>>>>
>>>> -eric
>>>>
>>>> On Mon, Feb 24, 2014 at 4:24 PM, reed kotler <rkotler at mips.com> wrote:
>>>>>
>>>>> On 02/24/2014 04:19 PM, Eric Christopher wrote:
>>>>>
>>>>> On Mon, Feb 24, 2014 at 4:14 PM, reed kotler <rkotler at mips.com> wrote:
>>>>>
>>>>> I'm trying to build a native hosted mips compiler on ubuntu x86.
>>>>>
>>>>> When I run configure with clang/llvm as the compiler, configure thinks
>>>>> that
>>>>> zlib is present and that valgrind is.
>>>>>
>>>>> But later on the make it cannot find zlib.h. If I tell it to not do
>>>>> compression, then it does not look for
>>>>> zlib.h but dies looking for valgrind, even if I tell it to
>>>>> disable-valgrind.
>>>>>
>>>>> If I configure using gcc-mips, it decides on it's own that zlib.h is
>>>>> not
>>>>> available.
>>>>> It also decides that valgrind is not available.
>>>>>
>>>>> Why the difference?
>>>>>
>>>>> How are you configuring?
>>>>>
>>>>> -eric
>>>>>
>>>>>
>>>>> (You can see our wiki page
>>>>> https://dmz-portal.mips.com/wiki/Build_mips_clang_llvm )
>>>>>
>>>>> Basically:
>>>>>
>>>>> $ OPT="-target mipsel-linux-gnu -mips32r2 -gcc-toolchain ${MIPS}"
>>>>>
>>>>>
>>>>> $ $CLANG_SRC/configure \
>>>>>       --prefix=$CLANG_INSTALL \
>>>>>       --build=i686-pc-linux-gnu \
>>>>>       --host=mipsel-linux-gnu \
>>>>>       --enable-optimized \                  # turn on optimization
>>>>>       "--with-extra-options=${OPT}" \
>>>>>       "--with-extra-ld-options=${OPT}" \
>>>>>       CC=$CLANG_TC/bin/clang \
>>>>>       CXX=$CLANG_TC/bin/clang++ \
>>>>>       RANLIB=$MIPS/bin/mips-linux-gnu-ranlib \
>>>>>       AR=$MIPS/bin/mips-linux-gnu-ar \
>>>>>       build_alias=i686-unknown-linux-gnu host_alias=mipsel-linux-gnu
>>>>>
>>>>>
>>>>> Any ideas?
>>>>>
>>>>> Reed
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> LLVM Developers mailing list
>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>>
>>>>>
>