[Bug 272155] graphics/R-cran-jpeg: Fails to build when math/R is build without JPEG support

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272155

            Bug ID: 272155
           Summary: graphics/R-cran-jpeg: Fails to build when math/R is
                    build without JPEG support
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: florian@wagner-flo.de
                CC: jrm@freebsd.org, ygy@freebsd.org
                CC: jrm@freebsd.org, ygy@freebsd.org

Created attachment 242942
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=242942&action=edit
Fix

I've already written to the port maintainer directly but haven't heard back in
two month.

I'm maintaining my own built of FreeBSD ports and for that I tend to disable a
bunch of options here and there to get a learner dependency tree. One of these
is unsetting JPEG when building math/R. Doing that makes building
graphics/R-cran-jpeg fail:

  gmake[1]: Entering directory
'/wrkdirs/usr/ports/graphics/R-cran-jpeg/work/jpeg/src'
  cc -I"/usr/local/lib/R/include" -DNDEBUG   -DLIBICONV_PLUG
-I/usr/local/include -isystem /usr/local/include   -fpic  -O2 -pipe 
-DLIBICONV_PLUG -fstack-protector-strong -isystem /usr/local/include
-fno-strict-aliasing   -c read.c -o read.o
  In file included from read.c:1:
  ./rjcommon.h:11:10: fatal error: 'jpeglib.h' file not found
  #include <jpeglib.h>

The reason for this is, that math/R without JPEG will not depend on jpeg-turbo
and this it will not be implicitly installed when building CRAN ports. So
there'll be no jpeglib.h to be found. On default (meaning JPEG option set for
math/R) it'll be there "coincidentally" so everything works.

The fix for this is the explicitly USES=jpeg in graphics/R-cran-jpeg. Patch is
attached.

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