Paul Eggert wrote: > * m4/threadlib.m4: When conditionally invoking a macro that uses > or might use AC_REQUIRE, put it inside AS_CASE or AS_IF instead > of using shell constructs directly.
This change was not needed, because the use of AS_CASE or AS_IF w.r.t. AC_REQUIRE is not needed inside AC_DEFUNs [1]. I.e. it is a precaution that is only needed in configure.ac. Bruno [1] https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.72/html_node/Common-Shell-Constructs.html
