[...]

--2022-04-02 10:37:09--  http://distfiles.pld-linux.org/by-md5/f/0/f02073fd96816b184c79b297775e37dc/libpng-1.6.37-apng.patch.gz
Resolving distfiles.pld-linux.org... 193.239.45.41
Connecting to distfiles.pld-linux.org|193.239.45.41|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 10781 (11K) [application/x-gzip]
Saving to: 'libpng-1.6.37-apng.patch.gz'
     0K ..........                                            100% 96.8M=0s
2022-04-02 10:37:09 (96.8 MB/s) - 'libpng-1.6.37-apng.patch.gz' saved [10781/10781]
./builder[2756]: ulimit: exceeds allowable limit
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libpng-1.6.37-2.src.rpm
real 0.37
user 0.16
sys 0.05
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
No conditional flags passed
from available:
--with   :	
--without:	 default_libpng tests
Available branches: DEVEL LIBPNG_1_2 LIBPNG_1_4 RA-branch libpng-1.6 master
libpng-1.6.37.tar.xz having proper md5sum already exists
libpng-1.6.37-apng.patch.gz having proper md5sum already exists
./builder[2756]: ulimit: exceeds allowable limit
Building target platforms: i686-linux
Building for target i686-linux
Wrote: /home/users/builder/rpm/SRPMS/libpng-1.6.37-2.src.rpm
real 0.41
user 0.20
sys 0.04
Writing git revision for tag tld/libpng-1.6.37-2
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:1.95s sys:2.14s real:7.54s (faults io:4 non-io:168183)
Files queued for ftp:
   1039014 libpng-1.6.37-2.src.rpm
       185 libpng-1.6.37-2.src.rpm.uploadinfo
End-TLD-Builder-Info