Objective-C Build Not Working?

[Sean Callaway]

Good afternoon, all.

I'm trying to build an SRPM in Copr and am getting an error stating that configure can't locate a working Objective-C runtime, although gcc-objc-4.8.5-4.el7.x86_64 and libobjc-4.8.5-4.el7.x86_64 are installed. I am rather new to this, so I might be missing something obvious, but I've poured over the logs and done my Googling.

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From root.log.gz:

DEBUG util.py:417:  Installed:
DEBUG util.py:417:    check-devel.x86_64 0:0.9.9-5.el7     doxygen.x86_64 1:1.8.5-3.el7             
DEBUG util.py:417:    gcc-objc.x86_64 0:4.8.5-4.el7        openldap-devel.x86_64 0:2.4.40-9.el7_2   
DEBUG util.py:417:    re2c.x86_64 0:0.13.5-1.el7.centos   
...
DEBUG util.py:417:    libobjc.x86_64 0:4.8.5-4.el7

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From build.log.gz:

checking how to run the Objective C preprocessor... gcc -E
checking objc/objc.h usability... yes
checking objc/objc.h presence... yes
checking for objc/objc.h... yes
checking if linking libobjc requires pthreads... no
checking for Apple Objective-C runtime... no
checking for GNU Objective C runtime... no
configure: error: Could not locate a working Objective-C runtime.
See `config.log' for more details.
error: Bad exit status from /var/tmp/rpm-tmp.BuTvvo (%build)
RPM build errors:
    Bad exit status from /var/tmp/rpm-tmp.BuTvvo (%build)
Child return code was: 1

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Any ideas?

Thanks!

- Sean Callaway