Roy,

great, thanks, I'll try to replicate that. I'm really surprised that an upgrade 
would delete headers - that's very unfriendly to say the least ;). I did 
upgrade Mojave but I did not upgrade Xcode (newer version tend to break more 
and more things) so that's maybe why I didn't see it.

Thanks,
Simon



> On Apr 4, 2019, at 4:19 PM, Roy Mendelssohn - NOAA Federal 
> <roy.mendelss...@noaa.gov> wrote:
> 
> Hi Simon:
> 
> here goes.  I was running 10.13.xx,  xx being whatever was the most recent 
> version.  I was compiling packages from source no problem.  Also,  the 
> Upgrade Section of App Store was telling me there was an incompatible version 
> of software available,  which was a new version of Xcode.
> 
> I upgraded to 10.14.4,  by the usual means,  did nothing special.
> 
> Upgrades in App Store said there was a new version of Xcode (among other 
> things).  So installed that.
> 
> Ran Xcode,  so that it would install "Other Components" which it often does 
> with a new version.
> 
> To be certain I had the Command lIne Tools,  in a terminal I ran:   sudo 
> xcode-select --install
> 
> Next time I ran RStudio,  two package upgrades were from source  (I apologize 
> I don't remember which packages).  Compilation failed with errors of couldn't 
> find the appropriate header files.
> 
> Ran the command in my note.
> 
> Restarted RStudio,  asked it to check for package updates,  same packages 
> appeared,  compilation went fine.
> 
> I am running Xcode 10.2
> 
> HTH,
> 
> -Roy
> 
> 
>> On Apr 4, 2019, at 12:26 PM, Simon Urbanek <simon.urba...@r-project.org> 
>> wrote:
>> 
>> Roy,
>> 
>> thanks, but can you give some details? I'm on a Mojave system and don't see 
>> any issues - this will likely depend on your Xcode installation. Does it 
>> mean some Xcode version is lacking headers? Which version, how did you 
>> install it?
>> 
>> Thanks,
>> Simon
>> 
>> 
>>> On Mar 30, 2019, at 2:21 PM, Roy Mendelssohn - NOAA Federal via R-SIG-Mac 
>>> <r-sig-mac@r-project.org> wrote:
>>> 
>>> I recently updated to Mojave and all of a sudden I was getting header not 
>>> found errors when trying to compile packages.  I was pretty certain my 
>>> Makevars files was correct,  as I had been compiling before the upgrade 
>>> successfully,  and the compilers hadn't changed.
>>> 
>>> The following is in some of the docs,  but just in case it helps,  cause it 
>>> took me awhile to find it,  after installing the Command Line Tools for 
>>> Xcode,  you should run:
>>> 
>>> sudo installer -pkg \
>>> /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
>>>  \
>>> -target /
>>> 
>>> and voila packages that had failed to compile just a few minutes ago 
>>> compiled successfully.
>>> 
>>> Hope this helps someone.
>>> 
>>> -Roy
>>> 
>>> 
>>> **********************
>>> "The contents of this message do not reflect any position of the U.S. 
>>> Government or NOAA."
>>> **********************
>>> Roy Mendelssohn
>>> Supervisory Operations Research Analyst
>>> NOAA/NMFS
>>> Environmental Research Division
>>> Southwest Fisheries Science Center
>>> ***Note new street address***
>>> 110 McAllister Way
>>> Santa Cruz, CA 95060
>>> Phone: (831)-420-3666
>>> Fax: (831) 420-3980
>>> e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/
>>> 
>>> "Old age and treachery will overcome youth and skill."
>>> "From those who have been given much, much will be expected" 
>>> "the arc of the moral universe is long, but it bends toward justice" -MLK 
>>> Jr.
>>> 
>>> _______________________________________________
>>> R-SIG-Mac mailing list
>>> R-SIG-Mac@r-project.org
>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>> 
> 
> **********************
> "The contents of this message do not reflect any position of the U.S. 
> Government or NOAA."
> **********************
> Roy Mendelssohn
> Supervisory Operations Research Analyst
> NOAA/NMFS
> Environmental Research Division
> Southwest Fisheries Science Center
> ***Note new street address***
> 110 McAllister Way
> Santa Cruz, CA 95060
> Phone: (831)-420-3666
> Fax: (831) 420-3980
> e-mail: roy.mendelss...@noaa.gov www: http://www.pfeg.noaa.gov/
> 
> "Old age and treachery will overcome youth and skill."
> "From those who have been given much, much will be expected" 
> "the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
> 

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