Re: [igraph] ./configure won't detect GMP

[Tamas Nepusz]

Hi Szabolcs,

Can you send me the file named "configure.log" (to my private address)?

T.
T.


On Thu, Sep 3, 2015 at 1:18 PM, Szabolcs Horvát <address@hidden> wrote:
> Hi Tamas,
>
> Actually gmp.h is present in $HOME/local/include.  I'm really confused
> about what is going wrong now.  Maybe there's something obvious I'm
> missing?
>
> Witness:
>
> $ ls $HOME/local/include
> gmp.h  igraph
>
> This is part of the output from ./configure:
>
> checking for libxml/parser.h... yes
> checking for __gmpz_add in -lgmp... yes
> checking gmp.h usability... no
> checking gmp.h presence... no
> checking for gmp.h... no
> checking that generated files are newer than configure... done
>
> So you are right that it doesn't find gmp.h
>
> But if I crudely remove the checking part from configure.ac and force
> it to try to use GMP anyway by setting gmp_support=yes, then igraph
> compiles without errors and works fine.
>
> On 2 September 2015 at 22:31, Tamas Nepusz <address@hidden> wrote:
>> Hi Szabolcs,
>>
>> The configure script looks for a header named gmp.h and a library that
>> contains the symbol named __gmpz_add. I think that your LDFLAGS is
>> okay since it contains a .dylib or .so file that contains __gmpz_add,
>> but your CFLAGS variable should be like this:
>>
>> export CFLAGS=-I$HOME/local/include/gmp
>>
>> This is because gmp installs its headers in $prefix/include/gmp and
>> not in $prefix/include, and igraph tries to include them with #include
>> <gmp.h>.
>>
>> T.
>>
>> T.
>>
>>
>> On Wed, Sep 2, 2015 at 5:54 PM, Szabolcs Horvát <address@hidden> wrote:
>>> Dear All,
>>>
>>> I'm compiling igraph on OS X 10.10.5 using the system compiler.
>>>
>>> I'm trying to use GMP 6.0.0 from https://gmplib.org/, which I
>>> installed into $HOME/local.  I configure igraph like this:
>>>
>>> export CFLAGS=-I$HOME/local/include
>>> export LDFLAGS=-L$HOME/local/lib
>>> ./configure --prefix=$HOME/local
>>>
>>> The configure script fails to detect GMP.  How can I get it to succeed?
>>>
>>> Notes: It does detect MacPorts's GMP if I try to use it.  It's also
>>> version 6.0.0.  If I remove the part of the configure script that
>>> detects GMP to trick it into thinking that it's present, igraph does
>>> compile correctly, and it does work correctly (including functions
>>> that use GMP).
>>>
>>> I don't know anything about autoconf and don't understand how it tries
>>> to detect GMP ...
>>>
>>> Am I doing something wrong or is the GMP detection buggy?
>>>
>>> Szabolcs
>>>
>>> _______________________________________________
>>> igraph-help mailing list
>>> address@hidden
>>> https://lists.nongnu.org/mailman/listinfo/igraph-help
>>
>> _______________________________________________
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>
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