Hello Zack,
thanks for the analysis.
>> [autoconf 6d38e9fa2b]
>> [clang 9.0.1]
>> [https://github.com/libarchive/libarchive.git]
>>
>> fails as below.
> ...
>> checking whether C compiler accepts -Wall... yes
>> checking whether C compiler accepts -Wformat... yes
>> checking whether C compiler
Follow-up Comment #12, sr #110403 (project autoconf):
The bug exists also in the /bin/sh of Solaris OpenIndiana 20171031.
The symptom is this failure during configure:
configure: creating ./config.status
config.status: creating Makefile
gawk: ./conf0h1pqt/subs.awk:1691: cat >>"$ac_tmp/subs1.awk"