[...]

checking for alarm... yes
checking for dup2... yes
checking for ftruncate... yes
checking for localtime_r... yes
checking for mempcpy... yes
checking for mkdir... yes
checking for munmap... yes
checking for nl_langinfo... yes
checking for rmdir... yes
checking for setlocale... yes
checking for socket... yes
checking for stpcpy... yes
checking for uname... yes
checking for library containing clock_gettime... none required
checking for cos in -lm... yes
checking for i686-tld-linux-gnu-pkg-config... /usr/bin/i686-tld-linux-gnu-pkg-config
checking pkg-config is at least version 0.9.0... yes
checking for gobject-introspection... yes
checking for blkid >= 2.20... yes
checking for libselinux >= 2.1.9... yes
checking for mallinfo... yes
checking whether unshare is declared... yes
checking for i686-tld-linux-gnu-gperf... no
checking for gperf... no
configure: error: *** gperf not found
error: Bad exit status from /tmp/B.rpIwOP/BUILD/tmp/rpm-tmp.u7FkVS (%build)
RPM build errors:
    line 57: It's not recommended to have unversioned Obsoletes: Obsoletes:	dev
    line 58: It's not recommended to have unversioned Obsoletes: Obsoletes:	hotplug
    line 59: It's not recommended to have unversioned Obsoletes: Obsoletes:	hotplug-input
    line 60: It's not recommended to have unversioned Obsoletes: Obsoletes:	hotplug-net
    line 61: It's not recommended to have unversioned Obsoletes: Obsoletes:	hotplug-pci
    line 62: It's not recommended to have unversioned Obsoletes: Obsoletes:	udev-dev
    line 64: It's not recommended to have unversioned Obsoletes: Obsoletes:	udev-tools
    line 94: It's not recommended to have unversioned Obsoletes: Obsoletes:	udev-compat
    line 124: It's not recommended to have unversioned Obsoletes: Obsoletes:	udev-static
    line 239: Trigger fired by the same package is already defined in spec file: %post core
    Bad exit status from /tmp/B.rpIwOP/BUILD/tmp/rpm-tmp.u7FkVS (%build)
ended at: Sun Mar 21 12:33:53 2021, done in 0:00:12.706167
error: No files produced.
+ chmod -R u+rwX /tmp/B.rpIwOP/BUILD
+ rm -rf /tmp/B.rpIwOP/tmp /tmp/B.rpIwOP/BUILD
+ rm -rf /tmp/B.rpIwOP
Begin-TLD-Builder-Info
Build-Time: user:11.64s sys:3.59s real:16.50s (faults io:0 non-io:764786)
End-TLD-Builder-Info