jzmq [경고] autoconf input should be named 'configure.ac', not 'configure.in'

jzmq 설치 중에 다음과 같은 경고 발생 시

$ ./autogen.sh
autoreconf: Entering directory `.'
autoreconf: configure.in: not using Gettext
autoreconf: running: aclocal -I config --force -I config
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: configure.in: tracing
autoreconf: running: libtoolize --copy --force
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'config'.
libtoolize: copying file 'config/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'config'.
libtoolize: copying file 'config/libtool.m4'
libtoolize: copying file 'config/ltoptions.m4'
libtoolize: copying file 'config/ltsugar.m4'
libtoolize: copying file 'config/ltversion.m4'
libtoolize: copying file 'config/lt~obsolete.m4'
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: running: /usr/bin/autoconf --include=config --force
autoreconf: running: /usr/bin/autoheader --include=config --force
autoreconf: running: automake --add-missing --copy --force-missing
automake: warning: autoconf input should be named 'configure.ac', not 'configure.in'
configure.in:28: installing 'config/compile'
configure.in:28: installing 'config/config.guess'
configure.in:28: installing 'config/config.sub'
configure.in:14: installing 'config/install-sh'
configure.in:14: installing 'config/missing'
Makefile.am: installing './INSTALL'
automake: warning: autoconf input should be named 'configure.ac', not 'configure.in'
src/Makefile.am: installing 'config/depcomp'
autoreconf: Leaving directory `.'
 

autoconf의 입력은 'configure.in'이 아닌 'configure.ac'가 필요하다고 하여 임의로 생성합니다.

$ cp ./configure.in ./configure.ac
 

그리고 configure.in 파일명을 변경합니다.

$ mv ./configure.in{,.bak}
 

다시 autogen.sh 스크립트 파일을 실행합니다.