Hi, In my configure.ac, I want to check in this perl module exiftool (http: //search.cpan.org/~exiftool/Image-ExifTool-10.20/lib/Image/ExifTool.pod ) exists as: AX_PROG_PERL_MODULES( Image::ExifTool, ,) But this is giving error: ./configure: line 4071: syntax error near unexpected token `Image::ExifTool,' ./configure: line 4071: `AX_PROG_PERL_MODULES( Image::ExifTool, ,)' What is going wrong here? For reference, here is my complete configure.ac AC_INIT([mkbib], [0.1],[],[mkbib]) AM_INIT_AUTOMAKE([1.9.6 dist-bzip2 subdir-objects]) AM_PATH_PYTHON([3.0]) AM_PATH_GTK_3_0([3.4.0],,AC_MSG_ERROR([Gtk+ 3.0.0 or higher required.])) AX_PROG_PERL_MODULES( Image::ExifTool, ,) GLIB_GSETTINGS AC_CONFIG_FILES([Makefile data/Makefile data/mkbib.desktop data/icons/Makefile data/icons/hicolor/Makefile data/icons/hicolor/48x48/Makefile data/icons/hicolor/48x48/apps/Makefile data/icons/hicolor/scalable/Makefile data/icons/hicolor/scalable/apps/Makefile data/ui/Makefile ]) AC_OUTPUT _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf