Stepan Kasal wrote:
Hi,
On Mon, Feb 07, 2005 at 03:40:02PM +0200, Philippe Trottier wrote:
here is something I have noticed, exec_prefix is set to NONE until the end of the config script... now I am thinking to see if it is set at NONE and if it is then set exec_prefix to ${prefix}, and put it back to NONE afterward ... does that make any sense ?
if it's set to NONE, it means it hasn't been given on the command line. Perhaps a macro below will execute
test $exec_prefix = NONE
Yes that I noticed...
But why is it not set at the beginning just like ${prefix} is a good question ...to see whether a value was given or not. I don't want to destroy this information, so I restore the previous state.
It would be also possible to do something like:
test "x$prefix" = xNONE && prefix=$ac_default_prefix test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' eval eval ac_define_dir="\"\\\"$1\\\"\"" test -d "$ac_define_dir" dnl
or even:
test "x$prefix" = xNONE && prefix=$ac_default_prefix test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' eval eval test -d "\"\\\"$1\\\"\"" dnl
But please note that I had to change the value assigned to exec_prefix,
and I had to add one more `eval' on that account.
setting the exec_prefix in the beginning of configure.ac would still allow the exec_prefix to be set at make stage (I think ?) any other reasons why it should be left to NONE till the end ? non- Unix platforms maybe ?The reason is that in the generated Makefiles, you should see:
exec_prefix = ${prefix}
not the value of $prefix. This subtle difference enables the following:
make prefix=...
which should change both prefix and exec_prefix variables.
To sum up, I think the solution with restoring NONEs is the cleanest way.
The other solution is not to touch it at all, but I do not know if with my clumsy use of sed is dangerous or not... then I have been trying to understand the disable and enable trouble in this case, it does seem to work very nicely, at least for me ...
AC_MSG_CHECKING([Library directory at])
if test "${exec_prefix}" = "NONE" ; then
eval test -d `echo $libdir | sed 's,exec_prefix,prefix,'` &&
eval LDFLAGS="-L`echo $libdir | sed 's,exec_prefix,prefix,'` $LDFLAGS" &&
else
eval test -d $libdir &&
eval LDFLAGS="-L$libdir $LDFLAGS" &&
fi
AC_MSG_RESULT($libdir)
I know I should rebraket everything to make it clean again ... I know I am not the only one trying to do the same thing, so I'll keep it complete ...
Phil
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