https://lists.freeradius.org/hyperkitty/list/freeradius-devel@lists.freeradius.org/thread/CY3YPWTAK2NMKN3HTUPXKGZ2X6OQGEFJ/
[PATCH] fix debian/rules to honour CFLAGS - Freeradius-Devel - lists.freeradius.org
patchfixdebianruleshonour
https://barnowl.mit.edu/browser/m4/ax_cflags_warn_all.m4?annotate=blame&rev=6383920fd2bf91655aa255c01f48608ecdca08fe
ax_cflags_warn_all.m4 in m4 – BarnOwl
cflagswarnbarnowl
https://openwall.com/lists/musl/2015/10/23/1
musl - Re: Having hard time adding to CFLAGS
hard timemusladdingcflags