Mailing List Archive: Problem compiling with libxml2 and Xcode 9

Problem compiling with libxml2 and Xcode 9

Oct 10, 2017, 4:48 AM

Post #1 of 6 (1698 views)

Hi all,

I just updated Xcode (Apple's developer tools for macOS) to version 9 and I'm no longer able to compile ClamAV 0.99.2 with libxml2 support.

Here's the relevant output from the configure script:

> ...
> checking for libxml2 installation... /usr
> checking xml2-config version... 2.9.4
> checking for xmlreader.h in /usr... found
> checking for xmlTextReaderRead in -lxml2... no
> configure: ****** libxml2 support unavailable
> ...
> configure: Summary of engine detection features
> bzip2 : ok
> zlib : /usr
> unrar : yes
> pcre : /usr/local/clamXav
> libxml2 : no
> yara : yes

I'm aware that things tend to break when updating Xcode, so I did this test in a virtual machine, which means I can say with certainty that the devtools are the only things to have changed. If I revert to the snapshot with Xcode 8.3, the configure script finds everything it needs to within /usr:

> ...
> checking for libxml2 installation... /usr
> checking xml2-config version... 2.9.4
> checking for xmlreader.h in /usr... found
> checking for xmlTextReaderRead in -lxml2... yes
> configure: Compiling and linking with libxml2 from /usr
> ...
> configure: Summary of engine detection features
> bzip2 : ok
> zlib : /usr
> unrar : yes
> pcre : /usr/local/clamXav
> libxml2 : yes, from /usr
> yara : yes

If I update again (or go back to the snapshot with Xcode 9) it fails.

I've compared the checksums of the libraries in /usr/lib/libxml2.* and they're identical before and after the upgrade. Similarly, diffing the contents of /usr/include/libxml2/libxml shows they're exactly the same too, so I'm not quite sure what's going on.

Can anyone help shed some light on the matter please?

Many thanks
Mark

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Re: Problem compiling with libxml2 and Xcode 9 [ In reply to ]

smorgan at sourcefire

Oct 10, 2017, 8:46 AM

Post #2 of 6 (1696 views)

Permalink

Mark,

The file config.log should contain the details of the configure test
performed for -lxml2.

Can you tell what are the relevant differences in those files?

Thanks,
Steve

On Tue, Oct 10, 2017 at 7:48 AM, Mark Allan <markjallan@gmail.com> wrote:

> Hi all,
>
> I just updated Xcode (Apple's developer tools for macOS) to version 9 and
> I'm no longer able to compile ClamAV 0.99.2 with libxml2 support.
>
> Here's the relevant output from the configure script:
>
> > ...
> > checking for libxml2 installation... /usr
> > checking xml2-config version... 2.9.4
> > checking for xmlreader.h in /usr... found
> > checking for xmlTextReaderRead in -lxml2... no
> > configure: ****** libxml2 support unavailable
> > ...
> > configure: Summary of engine detection features
> > bzip2 : ok
> > zlib : /usr
> > unrar : yes
> > pcre : /usr/local/clamXav
> > libxml2 : no
> > yara : yes
>
> I'm aware that things tend to break when updating Xcode, so I did this
> test in a virtual machine, which means I can say with certainty that the
> devtools are the only things to have changed. If I revert to the snapshot
> with Xcode 8.3, the configure script finds everything it needs to within
> /usr:
>
> > ...
> > checking for libxml2 installation... /usr
> > checking xml2-config version... 2.9.4
> > checking for xmlreader.h in /usr... found
> > checking for xmlTextReaderRead in -lxml2... yes
> > configure: Compiling and linking with libxml2 from /usr
> > ...
> > configure: Summary of engine detection features
> > bzip2 : ok
> > zlib : /usr
> > unrar : yes
> > pcre : /usr/local/clamXav
> > libxml2 : yes, from /usr
> > yara : yes
>
> If I update again (or go back to the snapshot with Xcode 9) it fails.
>
> I've compared the checksums of the libraries in /usr/lib/libxml2.* and
> they're identical before and after the upgrade. Similarly, diffing the
> contents of /usr/include/libxml2/libxml shows they're exactly the same too,
> so I'm not quite sure what's going on.
>
> Can anyone help shed some light on the matter please?
>
> Many thanks
> Mark
>
> _______________________________________________
> http://lurker.clamav.net/list/clamav-devel.html
> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>
> http://www.clamav.net/contact.html#ml
>
_______________________________________________
http://lurker.clamav.net/list/clamav-devel.html
Please submit your patches to our Bugzilla: http://bugs.clamav.net

http://www.clamav.net/contact.html#ml

Re: Problem compiling with libxml2 and Xcode 9 [ In reply to ]

markjallan at gmail

Oct 10, 2017, 9:02 AM

Post #3 of 6 (1696 views)

Permalink

Hi Steve,

Attached are the extracted lines from the config.log of the non-working version. The one which works just gives the following output:

> configure:17809: checking for xmlTextReaderRead in -lxml2
> configure:17834: gcc -o conftest -O2 -g -D_FILE_OFFSET_BITS=64 -mmacosx-version-min=10.6 -arch x86_64 -w -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/libxml2 -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib -lxml2 -lz -lpthread -licucore -lm conftest.c -lxml2 -L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib -lxml2 -lz -lpthread -licucore -lm >&5
> configure:17834: $? = 0
> configure:17843: result: yes

From a quick glance, I suspect that means there's a problem with the 10.13 SDK and I'll need to get in touch with Apple. Can you confirm that I'm right?

Thanks
Mark

Re: Problem compiling with libxml2 and Xcode 9 [ In reply to ]

smorgan at sourcefire

Oct 10, 2017, 10:05 AM

Post #4 of 6 (1696 views)

Permalink

Yes, I see it fail in the libxml2 test in looking for
/usr/lib/system/libsystem_darwin.dylib for x64.

Steve

On Tue, Oct 10, 2017 at 12:02 PM, Mark Allan <markjallan@gmail.com> wrote:

> Hi Steve,
>
> Attached are the extracted lines from the config.log of the non-working
> version. The one which works just gives the following output:
>
> > configure:17809: checking for xmlTextReaderRead in -lxml2
> > configure:17834: gcc -o conftest -O2 -g -D_FILE_OFFSET_BITS=64
> -mmacosx-version-min=10.6 -arch x86_64 -w -I/Applications/Xcode.app/
> Contents/Developer/Platforms/MacOSX.platform/Developer/
> SDKs/MacOSX10.12.sdk/usr/include/libxml2 -L/Applications/Xcode.app/
> Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib
> -lxml2 -lz -lpthread -licucore -lm conftest.c -lxml2
> -L/Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib -lxml2 -lz
> -lpthread -licucore -lm >&5
> > configure:17834: $? = 0
> > configure:17843: result: yes
>
>
>
> From a quick glance, I suspect that means there's a problem with the 10.13
> SDK and I'll need to get in touch with Apple. Can you confirm that I'm
> right?
>
> Thanks
> Mark
>
>
_______________________________________________
http://lurker.clamav.net/list/clamav-devel.html
Please submit your patches to our Bugzilla: http://bugs.clamav.net

http://www.clamav.net/contact.html#ml

Re: Problem compiling with libxml2 and Xcode 9 [ In reply to ]

markjallan at gmail

Oct 11, 2017, 3:11 AM

Post #5 of 6 (1689 views)

Permalink

Thanks. I've reported the issue and will see what comes of it...

Mark

> On 10 Oct 2017, at 6:05 pm, Steven Morgan <smorgan@sourcefire.com> wrote:
>
> Yes, I see it fail in the libxml2 test in looking for
> /usr/lib/system/libsystem_darwin.dylib for x64.
>
> Steve
>
> On Tue, Oct 10, 2017 at 12:02 PM, Mark Allan <markjallan@gmail.com> wrote:
>
>> Hi Steve,
>>
>> Attached are the extracted lines from the config.log of the non-working
>> version. The one which works just gives the following output:
>>
>>> configure:17809: checking for xmlTextReaderRead in -lxml2
>>> configure:17834: gcc -o conftest -O2 -g -D_FILE_OFFSET_BITS=64
>> -mmacosx-version-min=10.6 -arch x86_64 -w -I/Applications/Xcode.app/
>> Contents/Developer/Platforms/MacOSX.platform/Developer/
>> SDKs/MacOSX10.12.sdk/usr/include/libxml2 -L/Applications/Xcode.app/
>> Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib
>> -lxml2 -lz -lpthread -licucore -lm conftest.c -lxml2
>> -L/Applications/Xcode.app/Contents/Developer/Platforms/
>> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib -lxml2 -lz
>> -lpthread -licucore -lm >&5
>>> configure:17834: $? = 0
>>> configure:17843: result: yes
>>
>>
>>
>> From a quick glance, I suspect that means there's a problem with the 10.13
>> SDK and I'll need to get in touch with Apple. Can you confirm that I'm
>> right?
>>
>> Thanks
>> Mark
>>
>>
> _______________________________________________
> http://lurker.clamav.net/list/clamav-devel.html
> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>
> http://www.clamav.net/contact.html#ml

_______________________________________________
http://lurker.clamav.net/list/clamav-devel.html
Please submit your patches to our Bugzilla: http://bugs.clamav.net

http://www.clamav.net/contact.html#ml

Re: Problem compiling with libxml2 and Xcode 9 [ In reply to ]

markjallan at gmail

Oct 30, 2017, 3:35 PM

Post #6 of 6 (1656 views)

Permalink

Quick followup on this one in case anyone else needs it.

It turns out you need to use -isysroot if you want to specify an explicit SDK, and use -iwithsysroot to specify a header search path within the SDK.

Easiest way to do that is add the following to your CFLAGS and CXXFLAGS prior to running the configure script.

-isysroot $SDKRoot -iwithsysroot $SDKRoot

where $SDKRoot can be determined with the following:

xcrun --sdk macosx --show-sdk-path

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk

Mark

> On 11 Oct 2017, at 11:11 am, Mark Allan <markjallan@gmail.com> wrote:
>
> Thanks. I've reported the issue and will see what comes of it...
>
> Mark
>
>> On 10 Oct 2017, at 6:05 pm, Steven Morgan <smorgan@sourcefire.com> wrote:
>>
>> Yes, I see it fail in the libxml2 test in looking for
>> /usr/lib/system/libsystem_darwin.dylib for x64.
>>
>> Steve
>>
>> On Tue, Oct 10, 2017 at 12:02 PM, Mark Allan <markjallan@gmail.com> wrote:
>>
>>> Hi Steve,
>>>
>>> Attached are the extracted lines from the config.log of the non-working
>>> version. The one which works just gives the following output:
>>>
>>>> configure:17809: checking for xmlTextReaderRead in -lxml2
>>>> configure:17834: gcc -o conftest -O2 -g -D_FILE_OFFSET_BITS=64
>>> -mmacosx-version-min=10.6 -arch x86_64 -w -I/Applications/Xcode.app/
>>> Contents/Developer/Platforms/MacOSX.platform/Developer/
>>> SDKs/MacOSX10.12.sdk/usr/include/libxml2 -L/Applications/Xcode.app/
>>> Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib
>>> -lxml2 -lz -lpthread -licucore -lm conftest.c -lxml2
>>> -L/Applications/Xcode.app/Contents/Developer/Platforms/
>>> MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/lib -lxml2 -lz
>>> -lpthread -licucore -lm >&5
>>>> configure:17834: $? = 0
>>>> configure:17843: result: yes
>>>
>>>
>>>
>>> From a quick glance, I suspect that means there's a problem with the 10.13
>>> SDK and I'll need to get in touch with Apple. Can you confirm that I'm
>>> right?
>>>
>>> Thanks
>>> Mark
>>>
>>>
>> _______________________________________________
>> http://lurker.clamav.net/list/clamav-devel.html
>> Please submit your patches to our Bugzilla: http://bugs.clamav.net
>>
>> http://www.clamav.net/contact.html#ml
>

_______________________________________________
http://lurker.clamav.net/list/clamav-devel.html
Please submit your patches to our Bugzilla: http://bugs.clamav.net

http://www.clamav.net/contact.html#ml

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