Hi, We are using autoconf as part of our build system but have run into an error. When invoking autoconf, the following error is reported: configure.in:295: error: '<filename>' is already registered with AC_CONFIG_FILES where: <filename> is the name of a Makefile.am in our project. The construct in which this error appears is: AS_IF([test...], [AC_CONFIG_FILES([ ... list of Makefiles in various directories [AS_IF([test...], [makefile1.am makefile2.am makefile3.am])] ]) ]) I have verified that the list does not contain duplicate Makefile entries. The configuration script works fine when I remove the [AS_IF] statement, but not when it is included. I am fairly confident that the syntax used is correct and I have removed all trailing whitespace etc... Also, all of the Makefiles have been verified to be in UNIX format. I am using autoconf 2.68 and m4 1.4.15. Any help would be appreciated. Kind regards, Steve _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf