[LLVMdev] configure with clang vs gcc

[reed kotler]

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.

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.

#1 will allow me to work around my problem and should be there anyway.

#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
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>