[...]

./libpng-manual.txt 
Documentation compressed.
+ exit 0
Provides: libpng(APNG)-devel = 0.10 libtool(/usr/lib/libpng.la) libtool(/usr/lib/libpng16.la) pkgconfig(libpng) = 1.6.28 pkgconfig(libpng16) = 1.6.28
Requires(rpmlib): rpmlib(VersionedDependencies) <= 3.0.3-1
Requires: /bin/sh
Conflicts: libpng < 1.0.15
Processing files: libpng-static-1.6.28-1
Provides: libpng(APNG)-static = 0.10
Processing files: libpng-progs-1.6.28-1
Requires: libc.so.6 libc.so.6(GLIBC_2.0) libc.so.6(GLIBC_2.1) libc.so.6(GLIBC_2.11) libc.so.6(GLIBC_2.2) libc.so.6(GLIBC_2.3) libc.so.6(GLIBC_2.3.4) libc.so.6(GLIBC_2.4) libc.so.6(GLIBC_2.7) libm.so.6 libpng16.so.16 libpng16.so.16(PNG16_0) libz.so.1 libz.so.1(ZLIB_1.2.3.4) rtld(GNU_HASH)
Checking for unpackaged file(s): /usr/lib/rpm/check-files /tmp/B.9Rrn8C/BUILD/tmp/libpng-1.6.28-root-builder
Wrote: /tmp/B.9Rrn8C/RPMS/libpng-1.6.28-1.i686.rpm
Wrote: /tmp/B.9Rrn8C/RPMS/libpng-devel-1.6.28-1.i686.rpm
Wrote: /tmp/B.9Rrn8C/RPMS/libpng-static-1.6.28-1.i686.rpm
Wrote: /tmp/B.9Rrn8C/RPMS/libpng-progs-1.6.28-1.i686.rpm
Executing(%clean): env -i TMP=/home/users/builder/tmp HOME=/home/users/builder PATH=/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/users/builder/bin TMPDIR=/tmp/B.9Rrn8C/BUILD/tmp  /bin/sh -e /tmp/B.9Rrn8C/BUILD/tmp/rpm-tmp.96326
+ umask 022
+ cd /tmp/B.9Rrn8C/BUILD
+ cd libpng-1.6.28
+ /bin/rm '--interactive=never' -rf /tmp/B.9Rrn8C/BUILD/tmp/libpng-1.6.28-root-builder
+ rm -rf /tmp/B.9Rrn8C/BUILD/tmp/libpng-1.6.28-root-builder
ended at: Thu Mar 30 13:13:56 2017, done in 0:00:38.894180
mesg: ttyname failed: Inappropriate ioctl for device
+ chmod -R u+rwX /tmp/B.9Rrn8C/BUILD
+ rm -rf /tmp/B.9Rrn8C/tmp /tmp/B.9Rrn8C/BUILD
copy rpm files to cache_dir: /spools/ready
Creating pndir index of /spools/ready/ (type=dir)...
Loading [pndir]previous /spools/ready/packages.ndir.gz...
Loading [dir]/spools/ready/...
Writing /spools/ready/packages.ndir.gz...
Begin-TLD-Builder-Info
upgrading packages
Preparing...                ##################################################
libpng                      ##################################################
libpng-devel                ##################################################
End-TLD-Builder-Info
mesg: ttyname failed: Inappropriate ioctl for device
+ rm -rf /tmp/B.9Rrn8C
Begin-TLD-Builder-Info
Build-Time: user:148.65s sys:1.36s real:41.18s (faults io:5 non-io:1002210)
Files queued for ftp:
     28715 libpng-progs-1.6.28-1.i686.rpm
     93168 libpng-static-1.6.28-1.i686.rpm
    212629 libpng-devel-1.6.28-1.i686.rpm
    196479 libpng-1.6.28-1.i686.rpm
       198 libpng-1.6.28-1.src.rpm.uploadinfo
End-TLD-Builder-Info