+ # Check the presence of files that are mentioned as AC_LIBSOURCES arguments.
+ # The check is performed only when autoconf is run from the directory where
+ # the configure.ac resides; if it is run from a different directory, the
+ # check is skipped.
+ echo " m4_ifval([${macro_prefix_arg}_LIBSOURCES_LIST], ["
+ echo " m4_syscmd([test ! -d ]${macro_prefix_arg}_LIBSOURCES_DIR[ ||"
+ echo " for gl_file in ]${macro_prefix_arg}_LIBSOURCES_LIST[ ; do"
+ echo " if test ! -r ]${macro_prefix_arg}_LIBSOURCES_DIR[/\$gl_file ; then"
+ echo " echo \"missing file ]${macro_prefix_arg}_LIBSOURCES_DIR[/\$gl_file\" >&2"
+ echo " exit 1"
+ echo " fi"
+ echo " done])dnl"
+ echo " m4_if(m4_sysval, [0], [],"
+ echo " [AC_FATAL([expected source file, required through AC_LIBSOURCES, not found])])"
+ echo " ])"
+ echo " m4_popdef([${macro_prefix_arg}_LIBSOURCES_DIR])"
+ echo " m4_popdef([${macro_prefix_arg}_LIBSOURCES_LIST])"