On Sat, Jul 28, 2018 at 09:26:06PM +0300, Nir Soffer wrote: > I'm trying to build upstream source on RHEL 7.5 and get this error: > > # autoreconf -i > libtoolize: putting auxiliary files in `.'. > libtoolize: copying file `./ltmain.sh' > libtoolize: putting macros in AC_CONFIG_MACRO_DIR, `m4'. > libtoolize: copying file `m4/libtool.m4' > libtoolize: copying file `m4/ltoptions.m4' > libtoolize: copying file `m4/ltsugar.m4' > libtoolize: copying file `m4/ltversion.m4' > libtoolize: copying file `m4/lt~obsolete.m4' > configure.ac:190: error: possibly undefined macro: PKG_CHECK_VAR > If this token and others are legitimate, please use m4_pattern_allow. > See the Autoconf documentation. > autoreconf: /usr/bin/autoconf failed with exit status: 1 > > How to fix this? I hope I can avoid reading autoconf documentation :-) Can confirm it also happens for me (on RHEL 7.6 nightly). The attached patch should fix it.