Hi Paul, This patch is not good, IMO.
> Without this patch, ‘./configure CFLAGS="-m32"’ fails on gzip with GNU/Linux > x86-64. We have documented in https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.69/html_node/Preset-Output-Variables.html that this is the wrong way to do a 32-bit build on 64-bit platforms. There are two ways that work: 1) ./configure CC="gcc -m32" 2) ./configure CPPFLAGS="-m32" LDFLAGS="-m32" This configuration issue comes up occasionally, therefore it is a documentation problem that we should probably fix in the INSTALL file. I'd would be in favour of reverting this change because 1) AC_COMPILE_IFELSE is slower than AC_EGREP_CPP, and there is common consensus (discussion on gnu-prog-discuss in October 2016) that configure scripts are already slower than it should be. 2) There are many more uses of AC_EGREP_CPP outside of gnulib. Bruno
