Hello, * NightStrike wrote on Fri, Oct 16, 2009 at 06:45:57PM CEST: > xx=yes > AS_VAR_IF([xx],[yes],[echo equal],[echo not equal]) > results in this: > > xx=yes > if test "x$xx" = x""yes; then > echo equal > else > echo not equal > fi > with autoconf 2.63. > > How come the right hand side of the test is x""yes, as in, with two > double quotes between the x and the yes? Why isn't it just "xyes", or > just xyesy? It's not "xyes", because I think the quoting of the second argument to AS_VAR_IF was to be the user's responsibility. (FYI, if you pass a nonliteral as first argument, then autoconf will expand different code. xyesy would have been a problem if you pass $foo as second argument. The two double quotes look a bit ugly in the output, but are not really problematic. They are not really needed for the shell, if I remember correctly, but so that M4 splitting/macro expansion works as expected. Hope that helps. Is there an actual bug you've encountered with this code? Thanks, Ralf _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
