Rarely an error message when compiling kernel, any hint?

gglf900

WHen kernel compiling, sometimes error messages can be difficult to locate or sometimes nothing at all. From below log, it gives some indication of where it failed by giving line number of makefile etc but nothing much. Is there a good way to move forward toward troubleshooting?

LD [M] net/qrtr/qrtr.ko
LD [M] net/qrtr/qrtr-mhi.ko
LD [M] virt/lib/irqbypass.ko
error: Bad exit status from /var/tmp/rpm-tmp.S3j3Sq (%build)

RPM build errors:
Bad exit status from /var/tmp/rpm-tmp.S3j3Sq (%build)
make[2]: *** [scripts/Makefile.package:75: binrpm-pkg] Error 1
make[1]: *** [/home/nonroot/extdir/gg/git/linux/Makefile:1643: binrpm-pkg] Error 2
make: *** [Makefile:248: __sub-make] Error 2

So these will make 3 hints on following files and lines respectively:

Bad exit status from /var/tmp/rpm-tmp.S3j3Sq (%build)

make[2]: *** [scripts/Makefile.package:75: binrpm-pkg] Error 1
make[1]: *** [/home/nonroot/extdir/gg/git/linux/Makefile:1643: binrpm-pkg] Error 2

1) /var/tmp/rpm-tmp.S3j3Sq : error log but no file, have no idea where in this file to look
2) make[2]: *** [scripts/Makefile.package:75: binrpm-pkg] Error 1. Gives file name and line but still unsure what the error is:

Offending line:
rpm-pkg srcrpm-pkg binrpm-pkg: rpmbuild/SPECS/kernel.spec
** +$(strip rpmbuild -b$(build-type) rpmbuild/SPECS/kernel.spec \
** --define='_topdir $(abspath rpmbuild)' \
$(if $(filter a b, $(build-type)), \
--target $(UTS_MACHINE)-linux --build-in-place --noprep --define='_smp_mflags %{nil}' \
$$(rpm -q rpm >/dev/null 2>&1 || echo --nodeps) \
$(rpm-no-devel)) \
$(RPMOPTS))

3) make[1]: *** [/home/nonroot/extdir/gg/git/linux/Makefile:1643: binrpm-pkg] Error 2

Offending line, but no error, however it appears to lead to make[2] above