[R-SIG-Mac] XML packages source compilation on macOS 10.15.7

Kemal Akat km@460414 @end|ng |rom gm@||@com
Tue Feb 16 04:20:17 CET 2021

Hi Duncan and Simon,

Thanks for getting back to me.

The R version I use(d) is 

R Under development (unstable) (2021-01-15 r79833)

This was installed via the installer package downloaded from https://mac.r-project.org <https://mac.r-project.org/>. It was not compiled from source. That was the case on all Macs.

Please note that the partially log at the bottom of my original message is from a successful compilation on a Mac where ‘install.packages(“XML”) works. It includes references to the CommandLineTools/SDK but that was completely without my doing. I tried it explicitly in various forms, though, when I thought this is the right way. Thanks for clarifying it is not.

Now, on the Mac where I still have trouble, the output from ‘install.packages(“XML”) is (rather brief):

> install.packages("XML")
Warning: unable to access index for repository https://mac.R-project.org/bin/macosx/contrib/4.1:
  cannot open URL 'https://mac.R-project.org/bin/macosx/contrib/4.1/PACKAGES'
Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘XML’
Do you want to attempt to install these from sources? (Yes/no/cancel) Yes
installing the source package ‘XML’

trying URL 'https://mac.R-project.org/src/contrib/XML_3.99-0.5.tar.gz'
Content type 'application/x-gzip' length 968563 bytes (945 KB)
downloaded 945 KB

* installing *source* package ‘XML’ ...
** package ‘XML’ successfully unpacked and MD5 sums checked
** using staged installation
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking how to run the C preprocessor... gcc -E
checking for sed... /usr/bin/sed
checking for pkg-config... /usr/local/bin/pkg-config
checking for xml2-config... /usr/bin/xml2-config
USE_XML2 = yes
Minor 9, Patch 4 for 2.9.4
Located parser file -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/parser.h
Checking for 1.8:  -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
Using libxml2.*
checking for gzopen in -lz... yes
checking for xmlParseFile in -lxml2... yes
You are trying to use a version 2.* edition of libxml
but an incompatible library. The header files and library seem to be
mismatched. If you have specified LIBXML_INCDIR, make certain to also
specify an appropriate LIBXML_LIBDIR if the libxml2 library is not in the default
ERROR: configuration failed for package ‘XML’
* removing ‘/Library/Frameworks/R.framework/Versions/4.1/Resources/library/XML’
* restoring previous ‘/Library/Frameworks/R.framework/Versions/4.1/Resources/library/XML’

The downloaded source packages are in
Warning message:
In install.packages("XML") :
  installation of package ‘XML’ had non-zero exit status


> On Feb 15, 2021, at 5:42 PM, Simon Urbanek <simon.urbanek using R-project.org> wrote:
> Kemal,
> what Duncan said, since what you provided does not include any of the information needed.
> In addition, you should not include SDK paths directly - SDK is used by the dev tools and does *not* include the actual libraries. So when you say /foo/bar it is actually searched inside the SDK the compiler is using. If you happen to use compilers that don't use SDKs (non-Apple) then you can use -isysroot to specify the SDK root (hopefully not your case as that is a whole can of worms). In addition, the issue may come from your version of R as well so the exact information about that is also need (how you compiled it, which flags etc.).
> Cheers,
> Simon
>> On Feb 16, 2021, at 4:26 AM, Duncan Temple Lang via R-SIG-Mac <r-sig-mac using r-project.org> wrote:
>> Hi Kemal
>> Can you please send the output from the entire installation attempt, and
>> also the config.log file.
>> Thanks
>> Duncan
>> On Mon, Feb 15, 2021 at 5:14 AM Kemal Akat <kma460414 using gmail.com> wrote:
>>> Hello all,
>>> I have to compile the XML package from source for R 4.1 (development
>>> version) on a Mac with OS version 10.15.7. It works well on all machines
>>> that do not come with any significant ballast on developer tools. One
>>> machine, however, that I have used for some time returns a mismatch of
>>> header files and library. I looked into possible offenders and purged what
>>> I could (e.g. deleted Homebrew although the other machines have Homebrew
>>> and Miniconda installed as well) but to no avail.
>>> install.packages(“XML”) fails and install.packages("XML",
>>> configure.args=c("LIBXML_INCDIR=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/libxml2",
>>> "LIBXML_LIBDIR=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib”))
>>> also fails.
>>> There are obviously differences I cannot track down so far but I am
>>> running out of ideas. Both machines have MacOSX10.14.sdk and
>>> MacOSX10.15.sdk installed with MacOSX.sdk linking to MacOSX10.15.sdk.
>>> Here is part of the log of a successful compilation, and I was hoping
>>> someone could point me towards a solution.
>>> libxml include directory:
>>> -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
>>> libxml library directory:
>>> -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib -lxml2 -lz
>>> -lpthread -licucore -lm -lz  -lxml2
>>> libxml 2:                 -DLIBXML2=1
>>> Compilation flags:         -DLIBXML
>>> -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include
>>> Link flags:
>>> -L/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib -lxml2 -lz
>>> -lpthread -licucore -lm -lz  -lxml2
>>> Thanks,
>>> Kemal
>>> _______________________________________________
>>> R-SIG-Mac mailing list
>>> R-SIG-Mac using r-project.org
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>> -- 
>> ===============================
>> Duncan Temple Lang
>> Associate Dean for Graduate Programs
>> Professor, Department of Statistics
>> UC Davis
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