I'm sending this to both lists because I don't know which one is right. I'm trying to conditionally configure and build subdirectories using Automake conditionals. I'm flipping back and forth between both manuals, so I'm guessing both apply. I have a top level configure/makefile that I'm building to configure and build the various trees in the mingw-w64.sf.net project. Here's the relevant directory layout: trunk/ trunk/mingw-w64-libraries trunk/mingw-w64-libraries/libmangle trunk/mingw-w64-libraries/pseh trunk contains the top level configure.ac/makefile.am mingw-w64-libraries contains just sub directories libmangle and pseh both contain their own self-contained fully autotool'd build system This same thing is replicated across a lot of directories inside trunk, but I'm guessing once I get one right, I'll get them all. So I have a top level configure, and I put this in it: AC_MSG_CHECKING([whether to build the optional libraries]) AC_ARG_WITH([libraries], [AS_HELP_STRING([--with-libraries=ARG], [Build the extra mingw-w64 libs, where ARG is one of libmangle, pseh, or all])], [], [with_libraries=no]) AS_CASE([$with_libraries], [yes|all],[ with_libraries="libmangle,pseh" with_libraries_mangle=yes with_libraries_pseh=yes], [libmangle],[ with_libraries="libmangle" with_libraries_mangle=yes with_libraries_pseh=no], [pseh],[ with_libraries="pseh" with_libraries_mangle=no with_libraries_pseh=yes], [no],[ with_libraries_mangle=no with_libraries_pseh=no], [AC_MSG_ERROR([Invalid argument to --with-libraries: $with_libraries])]) AM_CONDITIONAL([LIBRARIES_MANGLE],[test "x$with_libraries_mangle" = xyes]) AM_CONDITIONAL([LIBRARIES_PSEH],[test "x$with_libraries_pseh" = xyes]) AM_COND_IF([LIBRARIES_MANGLE],[AC_CONFIG_SUBDIRS([mingw-w64-libraries/libmangle])]) AM_COND_IF([LIBRARIES_PSEH],[AC_CONFIG_SUBDIRS([mingw-w64-libraries/pseh])]) AC_MSG_RESULT([$with_libraries]) Those two AM_COND_IF lines at the bottom didn't use to be there. Instead, I had the AC_CONFIG_SUBDIRS lines in each appropriate branch of the case statement. However, autoreconf complained that hte macro was expanded more than once. Is the way I'm doing this kosher? Is it "The Right Way", or is there a better approach? (for the whole thing, not just the AM_COND_IF part) _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf