[...]

tmp/B.gnQzTn/BUILD/tmp
+ exec nice -n 19 rpmbuild -bb --define '_smp_mflags -j4' --define '_tld_builder 1' --define '_topdir /tmp/B.gnQzTn' --define '_specdir %{_topdir}' --define '_sourcedir %{_specdir}' --define '_rpmdir %{_topdir}/RPMS' --define '_builddir %{_topdir}/BUILD' --target x86_64-tld-linux /tmp/B.gnQzTn/Mesa.spec
error: Failed build dependencies:
	clang-devel >= 7.0.0 is needed by Mesa-19.0.4-1.src
	llvm-devel >= 7.0.0 is needed by Mesa-19.0.4-1.src
Building target platforms: x86_64-tld-linux
ended at: Wed May 29 15:24:02 2019, done in 0:00:00.088160
error: No files produced.
+ chmod -R u+rwX /tmp/B.gnQzTn/BUILD
+ rm -rf /tmp/B.gnQzTn/tmp /tmp/B.gnQzTn/BUILD
+ rm -rf /tmp/B.gnQzTn
Begin-TLD-Builder-Info
Build-Time: user:1.78s sys:0.40s real:5.15s (faults io:0 non-io:146097)
End-TLD-Builder-Info