Forbid the AX_COMPARE_VERSION macro from being found in the output configure script. If autoconf-archive is not installed when autoreconf is run, the following error message is emitted: configure.ac:231: error: possibly undefined macro: AX_COMPARE_VERSION 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 Signed-off-by: Eli Schwartz <eschwartz@archlinux.org> --- Actually, I think we can catch this error in a more visible way! At least now people will be able to tell that the autoreconf was borked and "it's missing something", and "possibly undefined macro" has better googleability than: (dash) ./configure: Syntax error: word unexpected (expecting ")") configure.ac | 1 + 1 file changed, 1 insertion(+) diff --git a/configure.ac b/configure.ac index e59f82e9..9db39232 100644 --- a/configure.ac +++ b/configure.ac @@ -228,6 +228,7 @@ PKG_CHECK_VAR(bashcompdir, [bash-completion], [completionsdir], , PKG_CHECK_MODULES(LIBARCHIVE, [libarchive >= 3.0.0], , AC_MSG_ERROR([*** libarchive >= 3.0.0 is needed to compile pacman!])) +m4_pattern_forbid([^AX_COMPARE_VERSION$]) # Check file for seccomp if test "x$with_file_seccomp" = "xauto"; then file_version="$(file --version| sed -n 's/^file-\(.*\)/\1/p')" -- 2.24.1