URL:
https://github.com/SSSD/sssd/pull/5573
Title: #5573: configure: set CPP macro with AC_PROG_CPP
kloczek commented:
"""
I can confirm that thi patch fixes buils fter "autoreconf -fiv" with ac 2.71 in
build env.
"""
See the full comment at
https://github.com/SSSD/sssd/pull/5573#issuecomment-815066137