[R-SIG-Mac] Xcode 9

[Kasper Daniel Hansen]

I don't see this with
  Xcode 9
  OS X Sierra (10.12.6)

and either

R Under development (unstable) (2017-09-26 r73351) -- "Unsuffered
Consequences"
Copyright (C) 2017 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin16.7.0 (64-bit)

or

R version 3.4.2 RC (2017-09-26 r73351) -- "Short Summer"
Copyright (C) 2017 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin16.7.0 (64-bit)

Specifically I can compile R and it passes make check.  Perhaps it got
fixed since the post.

On Fri, Sep 22, 2017 at 4:47 AM, peter dalgaard <pdalgd at gmail.com> wrote:

> Just a quick note: Xcode 9 will not presently create a working R on Sierra
> or earlier.
>
> This is because it ships with an SDK for 10.13 (unreleased) and defines an
> entry for utimensat(), which is not actually in the system library for
> earlier versions.
>
> There is no way we can fix this reliably for the upcoming 3.4.2 release,
> so if you intend to build R from sources, either
>
> - just do not upgrade, stay on Xcode 8.3.3
>
> or
>
> - manually remove the line from config.h saying
>
> #define HAVE_UTIMENSAT 1
>
>
> ----
>
> The slightly longer story is that Apple decided to have their include
> files generate a _warning_ that utimensat() is only available in 10.13,
> like this:
>
> gcc -I../../../R/src/extra  -I. -I../../src/include
> -I../../../R/src/include  -I/usr/local/include -I../../../R/src/nmath
> -DHAVE_CONFIG_H     -g -O2  -c ../../../R/src/main/platform.c -o platform.o
> ../../../R/src/main/platform.c:2474:5: warning: 'utimensat' is only
> available on
>       macOS 10.13 or newer [-Wunguarded-availability-new]
>     utimensat(AT_FDCWD, to, times, 0);
>     ^~~~~~~~~
> /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/sys/stat.h:374:5:
> note:
>       'utimensat' has been explicitly marked partial here
> int     utimensat(int __fd, const char *__path, const struct timespec __...
>         ^
> ../../../R/src/main/platform.c:2474:5: note: enclose 'utimensat' in a
>       __builtin_available check to silence this warning
>     utimensat(AT_FDCWD, to, times, 0);
>     ^~~~~~~~~
> ../../../R/src/main/platform.c:2890:11: warning: 'utimensat' is only
> available
>       on macOS 10.13 or newer [-Wunguarded-availability-new]
>     res = utimensat(AT_FDCWD, fn, times, 0) == 0;
>           ^~~~~~~~~
> /Applications/Xcode.app/Contents/Developer/Platforms/
> MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/sys/stat.h:374:5:
> note:
>       'utimensat' has been explicitly marked partial here
> int     utimensat(int __fd, const char *__path, const struct timespec __...
>         ^
> ../../../R/src/main/platform.c:2890:11: note: enclose 'utimensat' in a
>       __builtin_available check to silence this warning
>     res = utimensat(AT_FDCWD, fn, times, 0) == 0;
>           ^~~~~~~~~
> 2 warnings generated.
>
> Because of dynamic linking, we do not see the effect of this until we
> actually try running the binary:
>
> begin installing recommended package MASS
> dyld: lazy symbol binding failed: Symbol not found: _utimensat
>   Referenced from: /Users/pd/r-release-branch/BUILD-dist/bin/exec/x86_64/R
>   Expected in: /usr/lib/libSystem.B.dylib
>
> dyld: Symbol not found: _utimensat
>   Referenced from: /Users/pd/r-release-branch/BUILD-dist/bin/exec/x86_64/R
>   Expected in: /usr/lib/libSystem.B.dylib
>
> /Users/pd/r-release-branch/BUILD-dist/bin/INSTALL: line 34: 59149 Done
>                 echo 'tools:::.install_packages()'
>      59150 Abort trap: 6           | R_DEFAULT_PACKAGES= LC_COLLATE=C
> "${R_HOME}/bin/R" $myArgs --slave --args ${args}
>
>
> Same warning also happens during the configure checks, but as it is not an
> error the test program compiles and links OK (but is never run), and we get
>
> checking whether utimensat exists and is declared... yes
>
> Ugh!...
>
>
> - Peter D.
>
>
> --
> Peter Dalgaard, Professor,
> Center for Statistics, Copenhagen Business School
> Solbjerg Plads 3, 2000 Frederiksberg, Denmark
> Phone: (+45)38153501
> Office: A 4.23
> Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com
>
> _______________________________________________
> R-SIG-Mac mailing list
> R-SIG-Mac at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>

	[[alternative HTML version deleted]]