Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
libical-devel
libical-devel(x86-64)
pkgconfig(libical)

Requires :

libicalss_cxx.so.3()(64bit)
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
libicalss.so.3()(64bit)
libical(x86-64) = 3.0.3-2.el7
libicalvcal.so.3()(64bit)
/usr/bin/pkg-config
libical_cxx.so.3()(64bit)
rpmlib(PayloadIsXz) <= 5.2-1
pkgconfig(icu-uc)
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
libical.so.3()(64bit)
pkgconfig(icu-i18n)

Content of RPM :
/usr/include/libical
/usr/include/libical/ical.h
/usr/include/libical/icalarray.h
/usr/include/libical/icalattach.h
/usr/include/libical/icalcalendar.h
/usr/include/libical/icalclassify.h
/usr/include/libical/icalcluster.h
/usr/include/libical/icalcomponent.h
/usr/include/libical/icalderivedparameter.h
/usr/include/libical/icalderivedproperty.h
/usr/include/libical/icalderivedvalue.h
/usr/include/libical/icaldirset.h
/usr/include/libical/icaldirsetimpl.h
/usr/include/libical/icalduration.h
/usr/include/libical/icalenums.h
/usr/include/libical/icalerror.h
/usr/include/libical/icalfileset.h
/usr/include/libical/icalfilesetimpl.h
/usr/include/libical/icalgauge.h
/usr/include/libical/icalgaugeimpl.h
/usr/include/libical/icallangbind.h
/usr/include/libical/icalmemory.h
/usr/include/libical/icalmessage.h
/usr/include/libical/icalmime.h
/usr/include/libical/icalparameter.h
/usr/include/libical/icalparameter_cxx.h
/usr/include/libical/icalparser.h
/usr/include/libical/icalperiod.h
/usr/include/libical/icalproperty.h
/usr/include/libical/icalproperty_cxx.h
There is 37 files more in these RPM.