[...]

building SRPM using: cd rpm/packages; nice -n 0 ./builder -nu -nm --nodeps --http --define '_tld_builder 1' -bs  -r HEAD   fast_float.spec 2>&1
builder: SMP make flags are set to -j2
Cloning into 'fast_float'...
Already up to date.
Available branches: master
--2025-04-18 12:16:31--  http://distfiles.pld-linux.org/by-md5/e/9/e9a548c7cc8dd0c81d620cb22c97dc40/fast_float-6.1.0.tar.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: 95974 (94K) [application/x-gzip]
Saving to: 'fast_float-6.1.0.tar.gz'
     0K .......... .......... .......... .......... .......... 53%  765K 0s
    50K .......... .......... .......... .......... ...       100% 1.44M=0.1s
2025-04-18 12:16:31 (986 KB/s) - 'fast_float-6.1.0.tar.gz' saved [95974/95974]
./builder[2768]: ulimit: unlimited exceeds allowable coredump(blocks) limit
Updating .distbcond
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/fast_float-6.1.0-1.src.rpm
real 0.07
user 0.05
sys 0.01
exit status 0
Writing package revision
builder: SMP make flags are set to -j2
Already up to date.
Available branches: master
fast_float-6.1.0.tar.gz having proper md5sum already exists
./builder[2768]: ulimit: unlimited exceeds allowable coredump(blocks) limit
Updating .distbcond
Building target platforms: x86_64-linux
Building for target x86_64-linux
Wrote: /home/users/builder/rpm/SRPMS/fast_float-6.1.0-1.src.rpm
real 0.12
user 0.04
sys 0.06
Writing git revision for tag tld/fast_float-6.1.0-1
error: Macro %_builddir has empty body
Begin-TLD-Builder-Info
Build-Time: user:1.11s sys:0.64s real:3.64s (faults io:0 non-io:134107)
Files queued for ftp:
    111819 fast_float-6.1.0-1.src.rpm
       188 fast_float-6.1.0-1.src.rpm.uploadinfo
End-TLD-Builder-Info