Description of problem:
I can't build compat-gcc-7.3-2.96.110 by GNU cc - amongst warnings compiler 
emits error and then rpm hangs. Problem appear when output from rpm is 
pipelined, for example like `rpm ... | tee LOG`.
As I could get from `ps`, system waits two /bin/sh, which are spawned somewhere 
during build. They have parent PID as 1 and they don't exit. So parent of `rpm` 
becomes <defunct> waiting infinitely for child cleaning.
In this tracker you shouldn't mind about compilation errors during build but you 
should pay attention to such ill-formed build process, where compilation error 
causes hanging. Seems something inside has been finished unclearly. As 
installation script is usually run with root privilege, extra attention should be paid to 
neatness.

Iâll attach the log, done by ` rpmbuild --define "_topdir $(pwd)/.." --define "_tmppath 
$(pwd)/../tmp" -bb compat-gcc.spec 2>&1 | tee LOG` command with ctrl/C in the 
end (when it hangs). Feel free to contact me if you canât reproduce this bug (I note 
that you are to have error inside build, so probably erroneous patch will be needed 
for you).

Version-Release number of selected component (if applicable):


How reproducible:
always

Steps to Reproduce:
1. rpm -i compat-gcc-7.3-2.96.110.src.rpm
2. cd to SPECS directory
3. rpmbuild --define "_topdir $(pwd)/.." --define "_tmppath $(pwd)/../tmp" -bb 
compat-gcc.spec 2>&1 | tee LOG

    
Actual results:
Installation error and hanging

Expected results:
At least any exit without hanging and without extra running program left in memory.

Additional info: