This package does not compile due to:

pcaprub.c:11:18: fatal error: pcap.h: No such file or directory
 #include <pcap.h>
                  ^
compilation terminated.


Probably there is a missing buildrequire. My guess would be that you need to add:

BuildRequires: libpcap-devel

(In reply to Fabio Alessandro Locati from comment #1) 
> BuildRequires: libpcap-devel

After adding it, the errors become


$ rpmbuild -ba rpmbuild/SPECS/rubygem-pcaprub.spec 
Esecuzione(%prep) in corso: /bin/sh -e /var/tmp/rpm-tmp.tZRiv0
+ umask 022
+ cd /home/user/rpmbuild/BUILD
+ gem unpack /home/user/rpmbuild/SOURCES/pcaprub-0.12.4.gem
Unpacked gem: '/home/user/rpmbuild/BUILD/pcaprub-0.12.4'
+ cd /home/user/rpmbuild/BUILD
+ cd pcaprub-0.12.4
+ /usr/bin/chmod -Rf a+rX,u+w,g-w,o-w .
+ gem spec /home/user/rpmbuild/SOURCES/pcaprub-0.12.4.gem -l --ruby
+ exit 0
Esecuzione(%build) in corso: /bin/sh -e /var/tmp/rpm-tmp.7eRMdz
+ umask 022
+ cd /home/user/rpmbuild/BUILD
+ cd pcaprub-0.12.4
+ gem build pcaprub.gemspec
  Successfully built RubyGem
  Name: pcaprub
  Version: 0.12.4
  File: pcaprub-0.12.4.gem
+ mkdir -p ./usr/share/gems
+ CONFIGURE_ARGS='--with-cflags='\''-O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic'\'' '
+ gem install -V --local --build-root . --force --document=ri,rdoc pcaprub-0.12.4.gem
WARNING:  You build with buildroot.
  Build root: /home/user/rpmbuild/BUILD/pcaprub-0.12.4
  Bin dir: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/bin
  Gem home: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/.document
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/.travis.yml
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/FAQ.rdoc
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/Gemfile
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/LICENSE
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/README.rdoc
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/Rakefile
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/USAGE.rdoc
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/examples/dead_cap.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/examples/file_cap.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/examples/simple_cap.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/examples/telnet-raw.pcap
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c/extconf.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c/pcaprub.c
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/lib/pcaprub.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/lib/pcaprub/common.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/lib/pcaprub/ext.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/lib/pcaprub/version.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/test/test_helper.rb
/home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/test/test_pcaprub_unit.rb
Building native extensions.  This could take a while...
current directory: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c
/usr/bin/ruby -r ./siteconf20160706-15761-1i4anuk.rb extconf.rb

[*] Running checks for pcaprub_c code...
platform is x86_64-linux
checking for ruby/thread.h... yes
checking for rb_thread_blocking_region()... no
checking for rb_thread_call_without_gvl()... yes
checking for pcap_open_live() in -lpcap... yes
checking for pcap_setnonblock() in -lpcap... yes
creating Makefile
current directory: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c
make "DESTDIR=" clean
rm -f 
rm -f pcaprub_c.so  *.o  *.bak mkmf.log .*.time
current directory: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c
make "DESTDIR="
gcc -I. -I/usr/include -I/usr/include/ruby/backward -I/usr/include -I. -DHAVE_RUBY_THREAD_H -DHAVE_RB_THREAD_CALL_WITHOUT_GVL -I/opt/local/include -I/usr/local/include -I/usr/include -I/usr/include    -fPIC -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic -m64 -o pcaprub.o -c pcaprub.c
rm -f pcaprub_c.so
gcc -shared -o pcaprub_c.so pcaprub.o -L. -L/usr/lib64 -L/opt/local/lib -L/usr/local/lib -L/usr/lib64 -L/usr/lib -L. -Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -fstack-protector -rdynamic -Wl,-export-dynamic  -m64  -lruby -lpcap -lpcap  -lpthread -ldl -lcrypt -lm   -lc
current directory: /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4/ext/pcaprub_c
make "DESTDIR=" install
/usr/bin/mkdir -p . ./.gem.20160706-15761-1v5ysuc
exit > .RUBYARCHDIR.time
/usr/bin/install -c -m 0755 pcaprub_c.so ./.gem.20160706-15761-1v5ysuc
To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /home/user/rpmbuild/BUILD/pcaprub-0.12.4/usr/lib64/gems/ruby/pcaprub-0.12.4/mkmf.log
Successfully installed pcaprub-0.12.4
Parsing documentation for pcaprub-0.12.4
Parsing sources...
100% [13/13]  lib/pcaprub/version.rb    
Installing ri documentation for pcaprub-0.12.4
Installing darkfish documentation for pcaprub-0.12.4
Done installing documentation for pcaprub after 0 seconds
1 gem installed
+ exit 0
Esecuzione(%install) in corso: /bin/sh -e /var/tmp/rpm-tmp.9dfiOf
+ umask 022
+ cd /home/user/rpmbuild/BUILD
+ '[' /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64 '!=' / ']'
+ rm -rf /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64
++ dirname /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64
+ mkdir -p /home/user/rpmbuild/BUILDROOT
+ mkdir /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64
+ cd pcaprub-0.12.4
+ mkdir -p /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems
+ cp -a ./usr/share/gems/build_info ./usr/share/gems/cache ./usr/share/gems/doc ./usr/share/gems/extensions ./usr/share/gems/gems ./usr/share/gems/specifications /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems/
+ mkdir -p /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/lib64/gems/ruby/pcaprub-0.12.4
+ cp -a ./usr/lib64/gems/ruby/pcaprub-0.12.4/gem.build_complete ./usr/lib64/gems/ruby/pcaprub-0.12.4/pcaprub_c.so /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/lib64/gems/ruby/pcaprub-0.12.4/
+ rm -rf /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems/gems/pcaprub-0.12.4/ext/
+ /usr/lib/rpm/find-debuginfo.sh --strict-build-id -m --run-dwz --dwz-low-mem-die-limit 10000000 --dwz-max-die-limit 110000000 /home/user/rpmbuild/BUILD/pcaprub-0.12.4
extracting debug info from /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/lib64/gems/ruby/pcaprub-0.12.4/pcaprub_c.so
dwz: Too few files for multifile optimization
/usr/lib/rpm/sepdebugcrcfix: Updated 1 CRC32s, 0 CRC32s did match.
66 blocks
+ '[' noarch = noarch ']'
+ case "${QA_CHECK_RPATHS:-}" in
+ /usr/lib/rpm/check-buildroot
+ /usr/lib/rpm/brp-compress
+ /usr/lib/rpm/brp-strip-static-archive /usr/bin/strip
+ /usr/lib/rpm/brp-python-bytecompile /usr/bin/python 1
+ /usr/lib/rpm/brp-python-hardlink
+ /usr/lib/rpm/redhat/brp-java-repack-jars
Esecuzione(%check) in corso: /bin/sh -e /var/tmp/rpm-tmp.xD3nuY
+ umask 022
+ cd /home/user/rpmbuild/BUILD
+ cd pcaprub-0.12.4
+ pushd ./usr/share/gems/gems/pcaprub-0.12.4
~/rpmbuild/BUILD/pcaprub-0.12.4/usr/share/gems/gems/pcaprub-0.12.4 ~/rpmbuild/BUILD/pcaprub-0.12.4
+ popd
~/rpmbuild/BUILD/pcaprub-0.12.4
+ exit 0
Elaborazione file: rubygem-pcaprub-0.12.4-1.fc24.x86_64
errore: File non trovato: /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems/gems/pcaprub-0.12.4/ext


Errori di compilazione RPM:
    File non trovato: /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems/gems/pcaprub-0.12.4/ext

I would say that the error is pretty clear and straight-forward:

Elaborazione file: rubygem-pcaprub-0.12.4-1.fc24.x86_64
errore: File non trovato: /home/user/rpmbuild/BUILDROOT/rubygem-pcaprub-0.12.4-1.fc24.x86_64/usr/share/gems/gems/pcaprub-0.12.4/ext

Now everything should be fine.
Thanks

https://fedorapeople.org/~germano/package_reviews/rubygem-pcaprub/rubygem-pcaprub.spec

https://fedorapeople.org/~germano/package_reviews/rubygem-pcaprub/rubygem-pcaprub-0.12.4-1.fc24.src.rpm

Please delete commented code.

Package is ok, APPROVED.

Package request has been approved: https://admin.fedoraproject.org/pkgdb/package/rpms/rubygem-pcaprub

I have a few comments.

* The test suite is not executed
  - It is always good idea to execute the test suite to make sure the package
    works. There is test suite available in upstream repository, so it should
    not be a problem.

* Please remove the binary extension from the source tree
  - Please see [1] how to do it and for the link to associated BZ with reasoning.

* License
  - The license field does not contain valid Fedora identifier. Please see [2]
    and pick the correct one (likely LGPLv2?)



[1] http://pkgs.fedoraproject.org/cgit/rpms/rubygem-sqlite3.git/tree/rubygem-sqlite3.spec#n49
[2] https://fedoraproject.org/wiki/Licensing:Main#Software_License_List

BTW, for the EPEL7, you probably want to follow these guidelines [1], which are referenced on the top of regular Fedora packaging guidelines.


[1] https://fedoraproject.org/w/index.php?title=Packaging:Ruby&oldid=363159

I was trying to change the title due https://admin.fedoraproject.org/pkgdb/request/package/ error message "Invalid title for this bugzilla ticket (no "-" present)"

rubygem-pcaprub-0.12.4-1.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-84c96a7498

rubygem-pcaprub-0.12.4-1.fc23 has been pushed to the Fedora 23 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-c385335ed5

rubygem-pcaprub-0.12.4-1.fc24 has been pushed to the Fedora 24 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-b59a456f28

rubygem-pcaprub-0.12.4-1.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.

rubygem-pcaprub-0.12.4-1.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.

rubygem-pcaprub-0.12.4-1.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.